Structural flotation device

Abstract

A floating wave break device, having a deep and elongated shear panel formed of a sheet of high-density polyethylene (HDPE), and a plurality of buoyancy tubes transversely oriented along the elongated shear panel, each of the buoyancy tubes being formed of HDPE pipe. A structural joint is formed between each of the buoyancy tubes and a surface of the elongated shear panel, and a support is coupled between each of the buoyancy tubes and a surface of the shear panel.

Description

This application is a Continuation-in-part and claims benefit of copending U.S. patent application Ser. No. 10/951,106 filed in the name of the same inventor on Sep. 27, 2004, the complete disclosure of which is incorporated herein by reference, which claims the benefit of U.S. patent application Ser. No. 10/376,398 filed in the name of the same inventor on Feb. 28, 2003, now U.S. Pat. No. 6,796,262, which is incorporated herein by reference, which claims the benefit of U.S. Provisional Application Ser. No. 60/362,469 filed in the name of the same inventor on Mar. 7, 2002, the complete disclosure of which is incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to the field of flotation devices, and in particular to flotation devices formed of interconnected tubing or pipe and methods of forming the same.

BACKGROUND OF THE INVENTION

Many prior art float systems exist which use flotation devices formed from one of a variety of conventional materials such as Styrofoam, polyethylene tubs, concrete sections poured around Styrofoam cores and others. Large concrete floats are known in which concrete forms the structural component and the flotation device is enclosed Styrofoam or air.

Flotation devices using interconnected tubing or pipe for buoyancy and methods of forming the same are also generally well-known. U.S. Pat. 4,834,014, entitled FLOATING PLATFORM STRUCTURE, issued May 30, 1989, to Olsen, et al., for example, describes a semi-submersible floating platform structure supported by a number of buoyancy bodies in the form of pipes closed at the ends by welded plates. The closed pipes rest in recesses in a plurality of inverted cribs or yokes that also act as buoyancy bodies. A deck structure is mounted on top of columns projected above the buoyancy bodies to form the float structure.

U.S. Pat. No. 6,089,176, entitled APPARATUS FOR AND A METHOD OF CONSTRUCTING A FLOATING DOCK STRUCTURE, issued Jul. 18, 2000, to Costello describes a floating dock structure formed of two sets of parallel and space apart heavy-gauge, high-density polyethylene (HDPE) tubes interconnected and sealed water-tight by a plastic joining process to form a square or rectangular configuration of pontoon floats. An overlying series of deck crosspieces completes the floating dock structure.

Other prior art devices are also known using elongated buoyancy tubes or pipes with an overlying decking. Such devices as are known in prior art generally connect the elongated buoyancy tubes or pipes transversely between spaced apart generally planar walls.

While useful in some applications, all these prior art devices are generally limited as structural supports.

SUMMARY OF THE INVENTION

The present invention provides a floating wave break device, having a deep and elongated shear panel formed of a sheet of high-density polyethylene (HDPE), and a plurality of buoyancy tubes transversely oriented along the elongated shear panel, each of the buoyancy tubes being formed of HDPE pipe. A structural joint is formed between each of the buoyancy tubes and a surface of the elongated shear panel, and a support is coupled between each of the buoyancy tubes and a surface of the shear panel.

Thus, the present invention provides a floating wave break device and method for producing the same. The structural flotation device of the invention is formed of a deep and elongated shear panel embodied as a relatively thin and substantially planar sheet of high-density polyethylene (HDPE) that is supported in an upright orientation by two pluralities of substantially parallel and spaced apart heavy-gauge HDPE buoyancy tubes that are transversely oriented relative to the elongated shear panel, one plurality of the buoyancy tubes on each opposite side of the shear panel. All of the buoyancy tubes are of a substantially identical length that is shorter than the elongated shear panels. The openings in one end of each buoyancy tube is joined to a substantially planar and unbroken surface of the elongated shear panel with substantially water-tight structural seams along its entire circumference. Ends of the buoyancy tubes opposite from the shear panel are also sealed with substantially water-tight structural seams along its entire circumference. A support is provided between the shear panel and each of the buoyancy tubes for supporting the shear panel relative to the buoyancy tubes. The supports are optionally another heavy-gauge HDPE support tube extending between a portion of the shear panel spaced away from the juncture with the corresponding buoyancy tube and a portion the corresponding buoyancy tube spaced away from the shear panel. The support tubes are joined to both the shear panel and the corresponding buoyancy tube by a conventional thermal fusion plastic welding process. Optionally, the plastic weld joints between the support tubes and each of the shear panel and the corresponding buoyancy-tube are substantially water-tight structural seams formed along the entire circumference of openings in either end of the support tubes.

Alternatively, the supports are formed of sheets of the HDPE material of which the shear panels are formed. The sheet supports are optionally formed in an angle or curve to provide longitudinal as well as vertical support for the shear panel.

The durable HDPE material-based structural flotation device of this invention experiences no electrolysis, requires no painting, and is impervious to destructive marine borers.

Any concrete, wood or other deck can be installed on the top of the floating structure.

When the wave break shear panel is straight to form a substantially rectangular wave break, as shown in the Figures, the ends of the transverse buoyancy tubes are cut square and thermally fused to the shear panel formed by high-density polyethylene (HDPE) sheet material having a depth which is much deeper than the diameter of the buoyancy tubes and as long as the entire structural wave break device, which may be any length, but according to one aspect of the invention is about 20 to 40 feet in length. The depth of the shear panel is any depth greater than the diameter of the buoyancy tubes, which may be any diameter, but according to one aspect of the invention, the shear panel is 15 to 25 feet in depth. The buoyancy tubes are spaced apart as a function of flotation and structural requirements of the intended application.

According to another aspect of the invention, the floating wave break structure may be curved, as in a round or annular “donut” shape, or angled in another non-rectangular configuration. When the shear panel is curved to form a substantially curved floating structure or angled to form a non-rectangular structure, the ends of the transverse pipe sections are optionally contoured to match the curvature or angularity of the shear panels, but need not be so contoured.

Both the HDPE pipe and HDPE sheet are manufactured products that are commercially available. The currently manufactured sheet are heat fused to form sheet in longer lengths preferred for this invention. Longer lengths may become commercially available in time.

The effectiveness of the flotation system of the invention is the shear strength of the sheet of which the shear panels are formed. When the pipe sections of the buoyancy tubes are connected to the continuous sheet of the shear panel, which span the entire length of the wave break device, the large moment of inertia of the planar sheet results in a flotation device strong enough to operate as a structural device. The rigid connection of the tube sections to the sheet product flotation device maintain the planar orientation of the shear panels to the loaded deck surface such that a rigid structural component results upon which even buildings can be erected. The tube sections range in diameter from between about 14 inches to as much as 48 inches or more, the diameter selected being a function of the amount of flotation required for the application and the expected wave environment.

The effectiveness of the polyethylene sheet welded to the pipe sections also results in the structural flotation device being unusually strong relative to its weight. As a result the structural flotation device of the invention is easier to ship and handle than flotation devices of the prior art and also make very effective sectional barges or floating platforms.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated as the same becomes better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a pictorial view of a portion of a floating structure integrating the structural flotation device of the invention embodied as a pair of elongated shear panels spaced apart across the width of the structural flotation device;

FIG. 2 is a pictorial view of a portion of the monolithic structural flotation device of the invention;

FIG. 3 is a top-down view of the structural flotation device of the invention;

FIG. 4 is a cross-sectional view taken through the floating structure shown in FIG. 1 and showing the structural flotation device 10 of the invention;

FIG. 5 illustrates the structural flotation device of the invention embodied having shear panels of increased vertical depth and additional rows of transverse buoyancy tubes;

FIG. 6 is an end view that illustrates the wave break device of the present invention;

FIG. 7 is a pictorial view of the wave break device of the present invention;

FIG. 8 is a pictorial view of another alternative embodiment of the wave break device of the present invention having flexible tension devices that stabilize the buoyancy tubes relative to the shear panel depth, and optional flexible tension devices that stabilize the buoyancy tubes relative to the shear panel length;

FIG. 9 is a pictorial view of another alternative embodiment of the wave break device of the present invention having multiple flexible tension devices that stabilize the buoyancy tubes relative to the shear panel depth;

FIG. 10 illustrates the floating wave break device of the present invention having supplemental flotation contained in one or more of the transverse buoyancy tubes and a quantity of transverse ballast tubes mounted adjacent to the lower depending edge; and

FIG. 11 combines the floating wave break device of the present invention with the structural flotation devices illustrated in FIGS. 1-5 and described herein.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

In the Figures, like numerals indicate like elements.

The present invention is a structural flotation device and method for producing the same. The structural flotation device of the invention includes two elongated shear panels formed of substantially planar sheets of high-density polyethylene (HDPE) spaced apart by two or more substantially parallel and spaced apart heavy-gauge HDPE buoyancy tubes transversely oriented relative to the elongated shear panels, all of the buoyancy tubes being of substantially identical length foreshortened relative to the elongated shear panels, and both ends of each buoyancy tube being joined with substantially water-tight structural seams along its entire circumference to a substantially planar and unbroken surface of each of the elongated shear panels.

Use of a plastic joining process, such as thermal fusion, integrally joins the planar sheets of HDPE material with the transverse HDPE buoyancy tubes to form a single monolithic structural flotation device. The durable HDPE material-based structural flotation device of this invention experiences no electrolysis, requires no painting, and is impervious to destructive marine borers.

FIG. 1 is a pictorial view of a portion of a floating structure integrating the structural flotation device 10 of the invention embodied as a pair of elongated shear panels 12 of about 20 foot to 40 foot lengths spaced apart across the width of the structural flotation device 10. As illustrated, the spaced apart elongated shear panels 12 are substantially parallel and oriented vertically relative to the water line when the structural device 10 is floated. The elongated shear panels 12 are embodied as substantially planar sheets in the range of about ¾ inch or thicker high-density polyethylene(HDPE) spaced apart by two, three or more transverse buoyancy tubes 14 (one shown). The buoyancy tubes 14 are embodied by example and without limitation as substantially identical about 4 foot to 12 foot lengths of hollow SDR 32.5 HDPE tubes about 18 inch to 24 inch diameter. The buoyancy tubes 14 are alternatively embodied in tubes that are shorter or longer than the 4 to 12 foot range and may be of smaller or larger diameter than the 18 inch to 24 inch range.

Spacing between adjacent buoyancy tubes 14 is selected as a function of the expected load and structural requirements of the resulting structural flotation device 10. The thickness or gauge of the tube sections 14 and of the shear panels 12 are selected as a function of requirements required for a specific application as determined by structural calculations. Both the HDPE pipe for making the tubes 14 and the HDPE sheet for making the shear panels 12 are commercially available manufactured products. As currently manufactured, the HDPE sheets are heat fused to form sheet of the lengths desired for the shear panels 12 of this invention. Longer lengths of HDPE sheet material may become commercially available in time.

Each of the buoyancy tubes 14 is cut crosswise to its length so that it is significantly shorter than the elongated shear panels with all of the buoyancy tubes 14 being substantially the same length. The buoyancy tubes 14 are oriented transversely to the vertically oriented shear panels 12 and spaced along their lengths. The transverse buoyancy tubes 14 are joined to the elongated shear panels 12 either through a thermal fusion process or a mechanical joining process capable of achieving a desired rigid structural joint 15 having a water-tight seal. The combination of the elongated shear panels 12 with the transversely oriented buoyancy tubes 14 forms the monolithic foundation of the floating structure 10 which is a dock or another floating product.

The effectiveness of the monolithic structural flotation device 10 of the invention is the shear strength of the HDPE sheet 12 rigidly welded or otherwise rigidly joined to the ends of the tube sections 14. With the tube sections 14 structurally joined to the continuous shear panels 12, each one spanning the entire length of the monolithic structural flotation device 10 of the invention, the shear strength inherent in the planar dimension of the HDPE sheet results in an extremely large moment of inertia that resists crosswise distortion or bending, while the relatively short and large diameter tubes 14 result in a large moment of inertia resists distortion or bending about the longitudinal axis of the structure 10. The flotation device 10 thus forms an extremely rigid structural component.

According to one embodiment of the invention, the rigid structural joints 15 are produced by a conventional thermal fusion plastic welding process that joins the open ends of the HDPE pipe forming the buoyancy tubes 14 to the sheet of HDPE material of which the shear panels 12 are formed. The thermal fusion welding process is known to join the distinct buoyancy tubes 14 with the shear panels 12 in a single integral unit that produces the monolithic structural flotation device 10 of the invention.

Alternatively, the rigid structural joints 15 are produced by another conventional mechanical joining method, such as is generally well-known in the art. For example, the rigid structural joints 15 are produced by adhesive, or by bolts through a flange joined to the open ends of the buoyancy tubes 14 and corresponding holes in the shear panels 12. The rigid structural joints 15 are made water-tight by compressible o-rings or another suitable gasket captured between the flanges and the shear panels and being compressed by nuts threaded onto the bolts.

Optionally, multiple interior partial panels 16 of the HDPE material are thermally fused or otherwise structurally joined to an upper surface of each of the buoyancy tubes 14, which provide interior partitions and supports for various types and styles of decking 18. For example, a concrete, wood or other deck 18 can be installed on the top of the floating structure 10, using the shear panels 12 and interior partial panels 16 for support.

FIG. 2 is a pictorial view of a portion of the monolithic structural flotation device 10 of the invention. The deck 18 is removed from the floating structure shown in FIG. 1 to more clearly show the configuration structural flotation device 10. The buoyancy tubes 14 are spaced far enough from the plane defined by longitudinal top edges 20 of the vertical shear panels 12 to permit interior partial panels 16 to be fit under the deck 18. Each of the interior partial panels 16 is an elongated sheet of the HDPE material similar to the shear panels 12, but is only a fraction of the width or vertical dimension. The interior partial panels 16 are contoured or “coped” to conform to the outer shape of the buoyancy tubes 14. A rigid structural joint 22 is formed between the HDPE material of the buoyancy tubes 14 and the partial panels 16 by a conventional thermal fusion plastic welding process.

Although shown as being substantially parallel and evenly spaced between the vertical shear panels 12, the interior partial panels 16 are optionally oriented diagonally to the shear panels 12 in an “X” configuration. Thus embodied, the interior partial panels 16 operate as cross-bracing that provides shear strength crosswise to the vertical shear panels 12, as will be understood by those of skill in the mechanical arts.

Elongated stringers 24 are secured along the top edge of each interior partial panels 16 and along the interior top edge 20 of each of the shear panels 12 for attachment of the deck 18. According to different embodiments of the invention, the stringers 24 are by example and without limitation any 8 foot, 10 foot, or 12 foot or longer lengths of either 2 inch by 4 inch or 2 inch by 6 inch cross-section of wood, for example, treated fir of number 2 grade or better. The stringers 24 may be cut to shorter lengths as required. Decking 18 is fastened to the interior partitions by way of the stringers using conventional fasteners such as screws or nails (not shown).

Elongated whalers 26 are secured along the exterior top edge 20 of each of the shear panels 12 opposite the corresponding stringer 24. According to one embodiment of the invention, the whalers 26 are any 8 foot, 10 foot, or 12 foot or longer lengths of 3 inch by 8 inch or larger sections of wood, for example, treated fir of number 2 grade or better. Fasteners 28 such as bolts and nuts or another fastening means may be used to secure the stringers 24 and whalers 26 to the respective interior partial panels 16 and exterior shear panels 12.

FIG. 3 is a top-down view of the floating structure with the decking 18 removed to show the interior details of the structural flotation device 10, the stringers 24 are removed for clarity. As illustrated, multiple buoyancy tubes 14 are spaced transversely at intervals along the elongated shear panels 12 and rigidly coupled thereto by water-tight structural joints 15. Structural joints 22 are used to rigidly couple the elongated interior panels 16 at intervals along the transverse buoyancy tubes 14 between the external shear panels 12. Additional vertical splash panels 30 of the HDPE material are optionally coupled transverse to the external shear panels 12 and the interior panels 16 by thermal fusing or another suitable method.

FIG. 4 is a cross-sectional view taken through the floating structure shown in FIG. 1. As shown, the structural flotation device 10 of the invention includes three of the transverse buoyancy tubes 14 joined to the elongated shear panels 12. According to one embodiment of the invention, supplemental flotation 32 is provided. By example and without limitation, the supplemental flotation is embodied as StyTofoam in sheet form under the decking 18. The additional buoyancy is a function of the volume of the Styrofoam 32 provided, including the sheet area and thickness of the sheets. According to one embodiment of the invention, crosswise baffles 34 are suspended under the decking 18 between sequential transverse buoyancy tubes 14. The baffles 34 may be wooden in the form of minimum ½ inch treated plywood sheets secured to the transverse buoyancy tubes 14 and the interior wall of the shear panels 12. When the baffles 34 are formed of the HDPE material, they are structurally joined, as by thermal fusing, to both the transverse buoyancy tubes 14 and the shear panels 12. Optionally, the structural joints 22 between the baffles 34 and each of the buoyancy tubes 14 and shear panels 12 are embodied as intermittent or “skip” welds, which enhance manufacturability while ensuring the structural integrity and monolithic characteristic of the floating structure 10. The Styrofoam 32 is joined to the under side of the baffles 34. When the Styrofoam 32 is coated, no additional protection is needed. However, when the Styrofoam 32 is uncoated, a lower splash plate 36 is provided as a protective cover over the Styrofoam. When the splash plates 36 are formed of the HDPE material, they are also structurally joined, as by thermal fusing, to both the transverse buoyancy tubes 14 and the shear panels 12 using rigid structural joints 22 embodied as intermittent “skip” welds. The wood baffles 34 and Styrofoam covers 36 also add cross-axis shear strength to the structural flotation device 10.

When the interior partial panels 16 of HDPE material are present in combination with the baffles 34 of HDPE material, the two are optionally mutually thermally fused using, for example, the intermittent “skip” welds described above. The thermally fused combination of interior partial panels 16 and crosswise baffles 34 provide a very large moment of inertia acting crosswise to the moment of inertia provided by the elongated shear panels 12.

According to one embodiment of the invention, Styrofoam cores 38 are provided for one or more of the buoyancy tubes 14. The Styrofoam cores 38 provide additional protection from water intrusion and ensure continued buoyancy even if the tough HDPE material is breached.

FIG. 5 illustrates the structural flotation device 10 of the invention embodied having multiple rows of the transverse HDPE tubes. The vertical depth of the shear panels 12 is increased by use of wider sheets of the HDPE material, thereby making room for attachment of the additional rows of transverse tubes 14. The rows of transverse tubes 14 may be mutually vertically aligned (shown at center) or laterally offset (shown at right and left). Furthermore, the buoyancy tubes 14 and ballast tubes 48, while being shown in row and column arrangement, are alternatively arranged randomly relative to the shear panels 50.

According to one embodiment of the invention, an upper row 40 of the transverse tubes 14 are sealed to create the buoyancy tubes 14 that provide flotation, while one or more of the transverse tubes 14 of lower or deeper rows 42, 44 are filled with a ballast material 46, such as but not limited to concrete, grout or water, to create passive ballast tubes 48. For example, the passive ballast material 46 is introduced into the transverse tubes 14 through small passages 50 formed in the tube wall. When two or more of the small passages 50 are used, one can operate as a vent while the ballast material is being introduced. Afterward, the small passages 50 can be sealed, if desired. When the small passages 50 are thermally formed in the tube wall, a portion of the HDPE material can be thermally fused over the passage as a seal. The passive ballast tubes 48 act like a bulb keel on a boat to drive the center of gravity of the structural flotation device 10 lower relative to the waterline. The passive ballast tubes 48 thereby provide stability to the flotation device 10 in rough sea conditions.

When the ballast material 46 is to be water, the passive ballast tubes 48 are formed with at least two or more of the passages 50 that are left open. The passages 50 are positioned such that, when submersed in water during use, one of the passages operates as a fill hole for introduction of surrounding water into the interior of the tube, while another of the passages operates as a vent for air to escape. Alternatively, a single passage directed toward the top edge 20 of the shear panels 12, ie., the deck 18, is positioned to operate as both a fill hole and air vent. Thus, while water may flow through the ballast tubes 48 as a result of tidal, thermal or other current action, at any time the ballast tubes 48 contain an amount of water that acts as passive ballast material.

According to another alternative embodiment of the invention, the passive ballast material 46 is introduced into the transverse tubes 14 through one or more alternative shear panel passages 52 formed in one or both of the shear panels 12 within the diameter of the passive ballast tubes 48. According to one embodiment, the passage or passages 52 are small passages (shown at center) in the shear panels 12 through which the ballast material 46 is introduced. When the ballast material is to be water drawn from the surrounding body of water, either one or more of the passages 52 is positioned to operate as a vent, or the shear panel passages 52 are combined with one or more of the wall passages 50 positioned to operates as a vent for air to escape the ballast tube 48, as discussed above.

Alternatively, the shear panel passage 52 is sized as large as the diameter of the tube 48. A single passage 52 may be provided, which results in a close-ended tube 48 for pouring a ballast material 46 such as concrete, grout. Optionally, passage 52 is later covered and sealed if desired. When the ballast material 46 is to be water introduced when the structural flotation device 10 is floated and the ballast tubes 48 submerged, the surrounding water flows into and fills the tube 48 from the ends.

When the ballast tubes 48 are to be completely open at one or both ends by the full-sized shear panel passages 52 (even if later covered and sealed), one or both of the passages 52 are alternatively provided by providing holes in the shear panels 12 sized to admit the full outside diameter of the tube 48. The tube 48 fits within the shear panel passages 52 and, optionally, extends outside the bounds of the two shear panels. In such configuration, if the passages 52 are to be covered and sealed, an external cover 54 is applied as a disk of appropriately sized HDPE material either thermally fused to the tube 48, or joined by another conventional mechanical joining method, such as is generally well-known in the art. For example, the cover 54 is joined using an appropriate adhesive, or by bolts through a flange joined to the open ends of the tubes 48 and corresponding holes in the cover 54. The cover 54 is made water-tight by compressible o-rings captured between a flange on the tube 48 and the cover 54 and being compressed by nuts threaded onto bolts through the flange.

Multiple structural flotation devices 10 of the invention are optionally connected together side-to-side to form a large square or rectangular float. A rigid connection is provided between adjacent structural flotation devices 10 by means of bolts passed through the corresponding whalers 26. Optionally, the corresponding shear panels 12 of adjacent flotation devices 10 are thermally fused.

Multiple structural flotation devices 10 of the invention are optionally connected together end-to-end to form a long rigid pier. A rigid connection may be provided between adjacent structural flotation devices 10 by means of steel plates secured by bolts and nuts between corresponding interior partitions 16.

Alternatively, multiple structural flotation devices 10 of the invention are connected together end-to-end with hinged joints to form a long flexible pier. For example, steel jam plates are attached to the interior partitions 16 using bolts and nuts. Adjacent structural flotation devices 10 are attached by steel hinge plates connected between the steel jam plates using a pair of hinge pins inserted like the hinge pins of a bicycle chain through holes in either end of the hinge plate and mating holes in the steel jam plates of each structural flotation devices 10. Alternatively, the steel hinge plates are used with hinge pin bushings inserted through the interior partitions 16. The hinge pins are inserted through holes in either end of the hinge plate and the mating hinge pin bushings.

Adjacent structural flotation devices 10 are connected to other structural flotation devices 10 to form a right angle or rigid tee connection by means of steel plates attached to the outside whaler 26 by bolts and nuts.

Structural flotation devices 10 are connected to piling by means of conventional fixed pile hoops or chain type connectors.

Continuation-In-Part

FIG. 6 is an end view that illustrates a floating wave break device 100 of the present invention having a deep and elongated shear panel 102 embodied as a substantially planar sheet of high-density polyethylene (HDPE) that is supported in an upright orientation by two pluralities 104, 106 of substantially parallel and spaced apart heavy-gauge HDPE buoyancy tubes 14 that are transversely oriented relative to the elongated shear panel 102. One plurality 104 of the transverse buoyancy tubes 14 is joined on a first side 110 of the shear panel 102 adjacent to a flotation edge 105, with the other plurality 106 of the transverse buoyancy tubes 14 joined on a second side 112 of the shear panel 102 opposite from the first plurality 104 and adjacent to flotation edge 105. All of the transverse buoyancy tubes 14 are of a substantially identical length that is shorter than the depth and length of the deep and elongated shear panels 102. Openings 114 in first ends 116 of each transverse buoyancy tube 14 is joined to a respective substantially planar and unbroken side surface 110, 112 of the elongated shear panel 102 with the substantially water-tight structural seams or joints 15 along its entire circumference (shown for plurality 106 of the transverse buoyancy tubes 14). For example, the structural seams 15 are formed by a conventional thermal fusion plastic welding process.

Openings 120 in second or outer ends 122 of the transverse buoyancy tubes 14 opposite from the shear panel 102 are also sealed with substantially water-tight structural seams 124 along its entire circumference. For example, a cover plate 126 of the same heavy-gauge HDPE material of which the shear panel 102 is formed are thermal fusion plastic welded over the second ends 122 of the transverse buoyancy tubes 14 (shown for plurality 104 of the transverse buoyancy tubes 14).

Accordingly, when immersed in a surrounding body of water, the shear panel 102 hangs substantially vertically with its floatation edge 105 suspended by the first and second pluralities 104, 105 of transverse buoyancy tubes 14. A dependent edge 107 of the shear panel 102 hangs deep in the water.

According to one embodiment of the present invention, a support 128 is provided between the shear panel 102 and each of the transverse buoyancy tubes 14 for supporting the shear panel 102 relative to the transverse buoyancy tubes 14. The supports 128 are optionally embodied as combination tension-and-compression members that support the transverse buoyancy tubes 14 against bending forces acting between the tubes 14 and the body of the shear panel 102 as indicated by the arrow 129. For example, the supports are optionally embodied as tube-type gussets 130 that are formed of another heavy-gauge HDPE tube (shown on right). The supports 128 extend between a portion of the shear panel 102 spaced away from the juncture with the corresponding transverse buoyancy tube 14, and a portion the corresponding buoyancy tube 14 that is spaced away from the shear panel 102. When the supports 128 are formed by the tube-type-gussets 130, of the same or similar HDPE material of which the transverse buoyancy tubes 14 are formed. The tube supports 130 are joined to both the shear panel 102 and the corresponding transverse buoyancy tube 14 by a conventional thermal fusion plastic welding process, whereby substantially water-tight structural seams 132, 134 are formed along its entire circumference at opposite ends, respectively. Optionally, the plastic weld joints 132, 134 between the tube supports 130 and each of the shear panel 102 and the corresponding transverse buoyancy tube 14 are substantially water-tight structural seams formed along the entire circumference of openings in either end of the tube supports 130. The tube supports 130 thus operate as additional buoyancy tubes between each of the transverse buoyancy tubes 14 and respective first and second surfaces 110, 112 of the shear panel 102.

The tube supports 130 further operate to support the transverse buoyancy tubes 14 against twisting forces acting between the tubes 14 and the lengthwise direction of the shear panel 102 as indicated in FIG. 7 by the arrow 135. This ability to resist such twisting forces 135 is provided by the tube supports 130 having a diameter dimension extended along the lengthwise direction of the shear panel 102.

Alternatively, the supports 128 are formed of sheets or plates 136 of the same or similar HDPE material of which the shear panels 102 are formed (shown on left). The sheet supports 136 are optionally formed in an angle or curve to provide longitudinal as well as vertical support for the shear panel 102. The sheet supports 136 are joined to both the shear panel 102 and the corresponding transverse buoyancy tube 14 by a conventional thermal fusion plastic welding process, whereby structural seams 138, 140 are formed there between at opposite ends of the sheet supports 136, respectively. The sheet supports 136 also provide the combination tension-and-compression members that support the transverse buoyancy tubes 14 against bending forces 129 acting between the tubes 14 and the body of the shear panel 102.

When the shear panel 102 is straight to form a substantially rectangular floating wave break device 100, as shown in FIGS. 6 and 7, the ends of the transverse buoyancy tubes 14 are cut square and thermally fused to the shear panel 102 formed by high-density polyethylene (HDPE) sheet material having a depth D which is much deeper than the diameter of the transverse buoyancy tubes 14 and as long as the entire structural floating wave break device 100, which may be any length, but according to one aspect of the invention is about 20 to 40 feet in length L (shown in FIG. 7). The transverse buoyancy tubes 14 are adjusted to support the shear panel 102 in different sea conditions and wave action by adjusting diameter and length parameters. According to one or more embodiments of the present invention, the buoyancy tubes 14 are as long as the depth D of the shear panel 102, or even longer, which stabilizes the floating wave break device 100 in different sea conditions and wave action, with longer transverse buoyancy tubes 14 generally resulting in greater stability.

The depth D of the shear panel 102 is any depth greater than the diameter of the transverse buoyancy tubes 14, which may be any diameter, but according to one aspect of the invention, the shear panel 102 is 15 to 25 feet in depth D. The transverse buoyancy tubes 14 are spaced apart as a function of flotation and structural requirements of the intended application.

FIG. 7 is a pictorial view of the floating wave break device 100 of the present invention.

FIG. 8 is a pictorial view of another alternative embodiment of the floating wave break device 100 of the present invention wherein the supports 128 between the shear panel 102 and each of the transverse buoyancy tubes 14 for supporting the shear panel 102 relative to the transverse buoyancy tubes 14 are embodied as flexible tension support 142 that stabilize the buoyancy tubes 14 relative to the shear panel depth D. According to different embodiments of the present invention, the flexible tension supports 142 are embodied as cable, chain, rope or the like. Alternatively, the flexible tension supports 142 are embodied as solid rods or bars or hollow tubes that are much longer than their thickness or diameter such that they are relatively bendable under sideways loading. Respective coupling devices 144, 146 couple first and second ends 148, 150 of the tension supports 142 to the shear panel 102 and transverse buoyancy tubes 14. By example and without limitation, the coupling devices 144, 146 are embodied as corrosion resistant bolts, eye bolts, hooks, or another conventional device for substantially permanently coupling cable, chain, rope, rods or tubes, or the like to plates and tubes. The flexible tension supports 142 are coupled to the shear panel 102 and buoyancy tubes 14 at substantially equal distances from the intersection of the shear panel 102 and transverse buoyancy tubes 14 represented by the seams 15, whereby the flexible tension supports 142 form about a 45 degree angle to both the shear panel 102 and buoyancy tubes 14. The flexible tension supports 142 are optionally coupled to the buoyancy tubes 14 near the second or outer ends 122 of the transverse buoyancy tubes 14 opposite from the shear panel 102. However, the flexible tension supports 142 are optionally coupled to form different greater or lesser angles to the shear panel 102 and transverse buoyancy tubes 14 with the flexible tension supports 142 being coupled any where along the transverse buoyancy tubes 14 between their first and second or outer ends 116, 122. Optionally, the flexible tension supports 142 are coupled to the plate 126 that is welded over the second ends 122 of the transverse buoyancy tubes 14.

Optionally, different second flexible tension members 152 are coupled between adjacent transverse buoyancy tubes 14 for stabilizing them relative to the shear panel length L, while the first flexible tension supports 142 stabilize the transverse buoyancy tubes 14 relative to the depth D of the shear panel 102. According to one embodiment of the present invention, as illustrated on the second side 112 of the shear panel 102, the second flexible tension members 152 are coupled between the second or outer ends 122 of adjacent buoyancy tubes 14 for stabilizing them relative to the shear panel length L. The second flexible tension supports 152 are optionally coupled between adjacent transverse buoyancy tubes 14 at a position that is spaced a maximum distance from the shear panel 102 for providing maximum lengthwise stability. For example, the second flexible tension supports 152 are coupled at or adjacent to the second or outer ends 122 of adjacent transverse buoyancy tubes 14 for providing the most effective lengthwise stability. As illustrated by example and without limitation on the first side 110 of the shear panel 102, the second flexible tension supports 152 are optionally coupled between the cover plates 126 that are welded over the second ends 122 of adjacent transverse buoyancy tubes 14. For example, the second flexible tension supports 152 are coupled by coupling devices or couplers 154 that are substantially permanently mounted at or near the second ends 122 of the transverse buoyancy tubes 14, or that are coupled to the cover plates 126.

The flexible tension supports 152 are embodied as cable, chain, rope or the like. Alternatively, the flexible tension supports 152 are embodied as solid rods or bars or hollow tubes that are much longer than their thickness or diameter such that they are relatively bendable under sideways loading.

Optionally, the flexible tension supports 152 are embodied as a single cable, chain, rope, rod, bars or hollow tube device that spans the entire distance between the first and last transverse buoyancy tubes 14 with the couplers 154 securing the flexible tension members 152 at intermittent points along its length.

By example and without limitation, the couplers 154 for securing the flexible tension members 152 to adjacent transverse buoyancy tubes 14 or their respective cover plates 126 are embodied as corrosion resistant bolts, eye bolts, hooks, or another conventional device for substantially permanently coupling cable, chain, rope, rods or tubes, or the like to plates and tubes.

FIG. 9 is a pictorial view of another alternative embodiment of the floating wave break device 100 of the present invention wherein the supports 128 between the shear panel 102 and each of the transverse buoyancy tubes 14 for supporting the shear panel 102 relative to the transverse buoyancy tubes 14 are embodied as the flexible tension support 142. According to different embodiments of the present invention, multiple flexible tension supports 142 couple each of the transverse buoyancy tubes 14 to different areas of the shear panel 102 such that the transverse buoyancy tubes 14 are stabilized relative to the length L of the shear panel 102 while being simultaneously stabilized relative to the shear panel depth D. The multiple flexible tension supports 142 are shown for only one of the transverse buoyancy tubes 14 on each side 110, 112 of the shear panel 102, the multiple flexible tension supports 142 corresponding to others of the buoyancy tubes 14 are omitted for clarity.

FIG. 10 illustrates the floating wave break device 100 of the present invention having one or more of the transverse buoyancy tubes 14 (shown for plurality 104 of the transverse buoyancy tubes 14) having the Styrofoam cores 38, as illustrated in FIG. 4 and discussed herein above. The Styrofoam cores 38 provide buoyancy even if the cover plate 126 are not present over the openings 120, as illustrated in FIG. 4 and discussed herein above. Additionally, the cover plates 126 are optionally used in combination with the optional Styrofoam cores 38, whereby the optional Styrofoam cores 38 provide additional protection from water intrusion and ensure continued buoyancy even if the tough HDPE material is breached.

FIG. 10 also illustrates the floating wave break device 100 of the present invention having the transverse ballast tubes 48 mounted on one or both sides 110, 112 of the shear panel 102 adjacent to the lower depending edge 107 thereof opposite and spaced away from the plurality 104 of the transverse buoyancy tubes 14 adjacent to the upper flotation edge 105. The transverse ballast tubes 48 are, by example and without limitation, of the type discussed herein above.

Accordingly, the optional ballast tubes 48 are filled with the ballast material 46, such as but not limited to concrete, grout or water, to create passive ballast tubes 48, as discussed herein above. For example, the passive ballast material 46 is introduced into the transverse tubes 14 through the openings 120 in the outer ends 122. The openings 120 are optionally sealed with the plate 126 being welded over the second ends 122 of the transverse buoyancy tubes 14.

Alternatively, the passive ballast material 46 is introduced into the transverse tubes 14 through small passages 50 optionally formed in the tube wall. When two or more of the small passages 50 are used, one can operate as a vent while the ballast material is being introduced, as discussed herein above. Afterward, the small passages 50 can be sealed, if desired. When the small passages 50 are thermally formed in the tube wall, a portion of the HDPE material can be thermally fused over the passage as a seal. The passive ballast tubes 48 act like a bulb keel on a boat to drive the center of gravity of the floating wave break device 100 of the present invention lower relative to the waterline. The passive ballast tubes 48 also provide stability to the floating wave break device 100 in rough sea conditions.

As discussed herein above, when the ballast material 46 is to be water, the passive ballast tubes 48 are formed with at least two or more of the passages 50 that are left open. The passages 50 are positioned such that, when submersed in water during use, one of the passages operates as a fill hole for introduction of surrounding water into the interior of the tube, while another of the passages operates as a vent for air to escape. Alternatively, a single passage 50 directed toward the upper flotation edge 105 of the shear panels 102 is positioned to operate as both a fill hole and air vent. Thus, while water may flow through the ballast tubes 48 as a result of tidal, thermal or other current action, at any time the ballast tubes 48 contain an amount of water that acts as passive ballast material.

According to another alternative embodiment of the invention, the passive ballast material 46 is introduced into the transverse ballast tubes 48 through their openings 120 in second or outer ends 122 opposite from the shear panel 102. When the ballast material is to be water drawn from the surrounding body of water, one or both of the cover plates 126 is optionally installed over the openings 120 and sealed with the substantially water-tight structural seams 124, or alternatively the cover plates 126 are permanently removed.

FIG. 11 combines the floating wave break device 100 of the present invention with the structural flotation devices 10 illustrated in FIGS. 1-5 and described herein above. The floating wave break device 100 of the present invention is provided with the support 128 between the shear panel 102 and each of the transverse buoyancy tubes 14 for supporting the shear panel 102 relative to the transverse buoyancy tubes 14, as discussed herein above. By example and without limitation, the floating wave break device 100 of the present invention operates as a base with the spaced apart elongated exterior shear panels 12 joined on the outer ends 122 of the buoyancy tubes 14 by the water-tight structural joints 15. Optionally, one or more of the interior partial panels 16 of the HDPE material are thermally fused or otherwise structurally joined to an upper surface of each of the buoyancy tubes 14, as discussed herein above.

The elongated stringers 24 are optionally secured along the top edge of each interior partial panels 16, along the interior top edge 20 of each of the shear panels 12, and along one surface 110, 112 (shown) at the flotation edge 105 of the elongated shear panel 102 for attachment of the deck 18. The deck 18 (removed for clarity) is optionally installed on the top of the floating wave break device 100, using the exterior and interior shear panels 12 and 102 and interior partial panels 16 for support.

While the preferred embodiment of the invention has been illustrated and described, it will be appreciated that various changes can be made therein without departing from the spirit and scope of the invention. For example, the buoyancy tubes 14 are optionally square, rectangular or otherwise non-cylindrical in form and may be formed of one or more seamlessly welded sheets. The ballast tubes 48 are optionally square, rectangular or otherwise non-cylindrical in form and may be formed of one or more seamlessly welded sheets. Additionally, ballast may be provided in other forms, such as weights attached adjacent to the dependent edge 107 of the shear panel 102. Therefore, it is reasonably to be expected that those skilled in this art can make numerous revisions and adaptations of the invention, and it is intended that such revisions and adaptations will be included within the scope of the following claims as equivalents of the invention.

Claims

1. A floating wave break device, comprising:

a deep and elongated shear panel formed of a sheet of high-density polyethylene (HDPE);

a plurality of buoyancy tubes transversely oriented along the elongated shear panel, each of the buoyancy tubes being formed of HDPE pipe;

a structural joint formed between each of the buoyancy tubes and a surface of the elongated shear panel; and

a support coupled between each of the buoyancy tubes and a surface of the shear panel.

2. The device of claim 1 wherein each of the structural joints formed between the buoyancy tubes and the shear panel further comprises a substantially water-tight structural seam.

3. The device of claim 2 wherein each of the structural joints formed between the buoyancy tubes and the shear panel further comprises a thermal fusion joint.

4. The device of claim 1 wherein the plurality of buoyancy tubes transversely oriented along the elongated shear panel further comprises a first and a second plurality of buoyancy tubes transversely oriented along opposite sides of the shear panel.

5. The device of claim 4 wherein each of the first and a second plurality of buoyancy tubes is further positioned adjacent to one elongated edge of the shear panel.

6. The device of claim 5 wherein the support coupled between one or more of the buoyancy tubes and a surface of the shear panel further comprises a support tube of high-density polyethylene (HDPE).

7. The device of claim 6, further comprising a substantially water-tight structural seam between the support tube and each of the surface of the shear panel and the buoyancy tube.

8. The device of claim 5, further comprising ballast coupled adjacent to a dependent edge of the shear panel opposite from the first and a second pluralities of buoyancy tubes.

9. The device of claim 5, further comprising:

a pair of spaced apart elongated shear panels each formed of a sheet of high-density polyethylene (HDPE) and being oriented transversely of the first and a second pluralities of buoyancy tubes, one of the pair of spaced apart elongated shear panels being joined adjacent to respective ends of different ones of the first and second pluralities of buoyancy tubes opposite from the deep and elongated shear panel; and

a structural joint formed between the end of each of the buoyancy tubes and a surface of the respective elongated shear panel.

10. The device of claim 9 wherein the buoyancy tubes are further sized relatively shorter than the elongated shear panels.

11. A floating wave break device, comprising:

a shear panel formed of a relatively thin substantially planar sheet of high-density polyethylene (HDPE) that is relatively extended in length and depth;

first and second pluralities of buoyancy tubes each transversely oriented along the shear panel on opposite first and second surfaces thereof and adjacent to a first edge thereof, each of the buoyancy tubes being formed of HDPE pipe and being and being sized relatively shorter than the shear panel;

a structural joint formed between each of the buoyancy tubes and a surface of the elongated shear panel; and

a structural support coupled between one or more of the buoyancy tubes and respective first and second surfaces of the shear panel.

12. The device of claim 11 wherein one or more of the first and second pluralities of buoyancy tubes further comprises a substantially water-tight buoyancy tube.

13. The device of claim 11 wherein one or more of the structural supports further comprises a substantially water-tight buoyancy tube.

14. The device of claim 11, further comprising one or more ballast tubes coupled to the shear panel adjacent to a second edge thereof opposite from first edge thereof, each of the one or more ballast tubes containing an amount of ballast material.

15. The device of claim 11, further comprising a tension member coupled between two adjacent buoyancy tubes adjacent to respective outer ends thereof.

16. The device of claim 15 wherein one or more of the tension members coupled between two adjacent buoyancy tubes adjacent to respective outer ends thereof further comprises:

an elongated shear panel formed of a sheet of high-density polyethylene (HDPE) and being oriented transversely of the buoyancy tubes; and

a structural joint formed between the end of each of the buoyancy tubes and a surface of the elongated shear panel.

17. A floating wave break device, comprising:

first and second elongated shear panels each formed of a relatively thin substantially planar sheet of high-density polyethylene (HDPE), the first and second elongated shear panels being spaced apart a transverse distance that is a fraction of a longitudinal dimension of the panels;

a third shear panel formed of a relatively thin substantially planar sheet of high-density polyethylene (HDPE) having first and second side surfaces that are relatively extended in length and depth, the third shear panel being positioned between the first and second elongated shear panels; and

first and second rows of buoyancy tubes each formed of HDPE pipe having a diameter that is relatively narrower than a width dimension of the first and second elongated shear panels and a length that substantially fills the transverse distance between the third shear panel and each of the first and second elongated shear panels, the first and second rows of buoyancy tubes being spaced apart between the elongated shear panels with each of the buoyancy tubes of the first row being structurally joined in transverse orientation to the first side surface of the third shear panel and an unbroken surface of the first elongated shear panel, and each of the buoyancy tubes of the second row being structurally joined in transverse orientation to the second side surface of the third shear panel and an unbroken surface of the second elongated shear panel.

18. The device of claim 17, further comprising a structural support coupled between one or more of the buoyancy tubes and the third shear panel.

19. The device of claim 18, further comprising a substantially water-tight joint between one or more of the buoyancy tubes and each of the third shear panel and a respective one of the first and second shear panels.

20. The device of claim 19, further comprising an amount of supplemental flotation contained by one or more of the buoyancy tubes.