Fluke Type Patents (Class 114/301)
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Patent number: 5855181Abstract: A fixed shank plow anchor includes a weighted nose having a spike incorporated into it to enhance deployment of the anchor on the sea bed. The center of gravity of the anchor is situated within the shank so that when the anchor drops onto a sea bed, and force is applied to the end of the shank in a forward direction, an overturning moment is created facilitating digging of the nose of the anchor into the sea bed. The anchor is self-launching.Type: GrantFiled: February 14, 1997Date of Patent: January 5, 1999Inventor: Sefton M.D. Oxford
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Patent number: 5850802Abstract: A collapsible boat anchor (12) comprising four side panels (13, 13a, 13b and 13c) each hingeably connected to the next as to form a square. To the forward and rearward side panels (13 and 13b) respectively are affixed a plurality of flukes (14 through 20a) arranged in upper and lower configuration as to allow the anchor (12) to set on whichever side it may fall. Moveable attached to the inside of the anchor at forward side panel (13) and right side panel (13c) is a center stabilizing bar (30). The center stabilizing bar (30) secures the anchor in an open and locked position while engaged, but facilitates collapse of the anchor for storage while disengaged. To provide a tie-off location for an anchor line, a lead arm (28) is pivotably affixed to the anchor at a anchor pull ring (26).Type: GrantFiled: July 16, 1997Date of Patent: December 22, 1998Inventor: Ryan T. Dvorak
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Patent number: 5829379Abstract: The invention relates to a plate anchor having two anchor plates (2, 3) which are disposed in a plane and have between them a gap (12) which extends in the longitudinal direction of the anchor. An anchor shaft (1) is swingably mounted on pivot means which is disposed in the region of the end of the anchor plates (2, 3) which is directed generally away from the anchored vessel, whereby the shaft (1) can be swung into and through the gap (12). Each anchor plate (2, 3) has at least one forwardly disposed pointed claw element (21, 31) and at least one lagging pointed claw element (22, 32). All of the claw elements have lateral edges which are backswept in the direction generally away from the ship.Type: GrantFiled: January 21, 1997Date of Patent: November 3, 1998Inventor: Rudiger von Spies
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Patent number: 5823133Abstract: Method and apparatus for the anchoring of a floating object by an elongated shank having an attached fluke that extends along the vicinity of the shank, with an edge of the fluke extending to a tip from a constraint movably mounted on the shank, with the fluke apertured and proportioned to limit fouling by a rode attached to the shank and facilitate attachment for storage.Type: GrantFiled: March 3, 1997Date of Patent: October 20, 1998Inventor: Peter C. Mele
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Patent number: 5806456Abstract: Plow type anchors that include a fluke and an arcuate shank having a long leg portion and a short leg portion that attaches the long leg portion to the fluke are improved by being provided with a plurality of hitch members spaced apart longitudinally along the long leg portion enabling an anchor line to be attached to the anchor at different positions along the arcuate shank to thereby provide a plurality of attack angles at which the anchor will enter and proceed into the mooring bed during an anchoring operation employing the anchor.Type: GrantFiled: June 19, 1997Date of Patent: September 15, 1998Inventor: Andrew L. Peabody
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Patent number: 5784981Abstract: A boat anchor assembly which allows the boat anchor to be retrieved easily, even when fouled in rocks or debris on a lake bottom, for example. The anchor includes a V-shaped anchor, structure for attaching an anchor line to the end of the anchor shank, an anchoring line, and a breakable tie. The end of the anchor line is attached to the anchor crown and removably attached by a tie to the structure for attaching an anchor line to the end of the anchor's shank. The tie will break when sufficient force is applied to the anchor line, thus to transfer the pulling force exerted by the anchor line from the end of the shank to the crown so that the anchor may be easily pulled from any entanglements. The entire V-shaped anchor is coated in a plastic or other suitable material to prevent rust, and the arm and shank of the V-shaped anchor are tapered towards their ends so as easily to penetrate a brush pile or rock bed.Type: GrantFiled: September 17, 1997Date of Patent: July 28, 1998Inventor: Leonard R. Graham, Sr.
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Patent number: 5743207Abstract: An apparatus and method for anchoring a buoyant device are provided. The apparatus preferably includes first and second plates adjoined along a common line. An end of the second plate is transversely connected to an end of the first plate along the common line and extends inwardly therefrom at a predetermined angle so that the first and second plates in combination define an angled plate member. A shank is pivotally connected to a medial portion of the angled plate member and extends outwardly therefrom. At least one prong member is connected to and extends outwardly from the outer surface of each of the first and second plates of the angled plate member.Type: GrantFiled: March 12, 1997Date of Patent: April 28, 1998Assignee: International Design Systems CompanyInventor: Sabah Naser Al-Sabah
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Patent number: 5683209Abstract: An anchor comprising an exterior bale and having two fluke planes in a horizontal plane that lie vertically parallel and in a horizontal plane are separated by vertical ribs uniting the horizontal planes at an angle of 90.degree. and forming with them open spaces between the fluke planes that allow the passage of marine floor material through the entire length of the fluke planes area. Stops elements are to either side of the fluke plane and control the burial angle rotation of the fluke in relationship to the bale.Type: GrantFiled: February 1, 1993Date of Patent: November 4, 1997Inventor: John L. Costley, Jr.
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Patent number: 5640921Abstract: Anchor fluke comprising a bottom side and an upper side and a longitudinal plane of symmetry, the upper side being defined by two convexly bent faces, formed by faces ascending in a convex manner from the sharp front edge in a symmetrical fashion relative to the longitudinal plane of symmetry twoards the rear and sidewards upto an apex line, by surfaces connecting smoothly thereonto in that location and descending in a symmetrical and convex fashion rearwards and towards the sides.Type: GrantFiled: May 31, 1995Date of Patent: June 24, 1997Assignee: Vrijhof Ankers Beheer B.V.Inventors: Rob Van Den Haak, Gijsbertus Degenkamp
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Patent number: 5619947Abstract: A releasable anchor includes a generally "J" shaped fluke formed of a resilient material which has memory to return the fluke to a "J" shape after a biasing force has been applied thereto. Preferably, the fluke is formed of a strap of spring steel and has a weight affixed to the free end so as to direct the fluke's free end downwardly through the water. One or more flukes may be connected to form variations in anchor shape.Type: GrantFiled: July 7, 1995Date of Patent: April 15, 1997Inventor: J. Douglas Lewis
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Patent number: 5546884Abstract: Anchor fluke, being formed as to have a penetration or front-side and a rear side, as well as a longitudinal plane of symmetry intersecting these sides, the anchor fluke comprising first device for attachment of an anchor line for use in a vertical anchoring system and a second device for attachment of at least two connecting lines spaced in the longitudianl plane of symmetry so as to connect the fluke to a pulling or penetration anchor line, the fluke being so formed that at least its upper surface has a shape convexly curved or buckled in cross-section along the plane of symmetry, the first attachment device for the anchor line for a vertical anchoring system being located near the center of area of the fluke.Type: GrantFiled: June 7, 1995Date of Patent: August 20, 1996Assignee: Vrijof Ankers Beheer B.V.Inventor: Rob Van Den Haak
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Patent number: 5546883Abstract: Method for anchoring an object in a body of water having a ground-like bottom, in which an anchor, comprising a fluke with upper surfaces having a center location and a shank, which obliquely extends upwards and forwards from the fluke and is connected by a first end to the fluke and can be attached by a second end to a penetration or pulling line, is pulled into the bottom ground by a pulling line, and wherein the anchor, after the fluke has penetrated the bottom ground to a sufficient extent, is attached by an anchor line to the object, the point of engagement of the anchor line being located above the center location of the upper surfaces of the fluke and the pulling force exerted thereon via the anchor line being essentially directed vertically.Type: GrantFiled: May 10, 1994Date of Patent: August 20, 1996Assignee: Vrijhof Ankers Beheer B.V.Inventor: Rob van den Haak
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Patent number: 5542368Abstract: A lightweight anchor, with its upward-bent tail fin, big-notched fluke and a shank of steel bar bent into a U shape, together with its entire shape, has a great hold of the bottom. The anchor when stuck in a bottom obstacle can be recovered from the bottom simply by moving the ship of its user to the opposite position of its mooring and giving a tug or two to its anchor rope. Because it is simply structured and easy of fabrication with immovable fluke, tail fin and shank, it reduces the cost of fabrication and enhances safety of handling. It avoids most of the demerits of conventional lightweight anchors by its simple structure and its peculiar shape, but its position-correcting mechanism is most remarkable.Type: GrantFiled: August 1, 1994Date of Patent: August 6, 1996Inventor: Kenji Yoshioka
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Patent number: 5540175Abstract: An anchor comprising a fluke means with upper surfaces having a center of area and a front end or penetration end and a rear end, and a shank means, being connected at a first end to the fluke means and, being provided at a second end with first means for attachment to an anchor or pulling line, said shank means being attached by means of at least one hinged joint to the fluke means at a location at a distance of the center of area, and being attached by means of a disconnectable connection to the fluke means in a location on the other side of the center of area with respect to the hinged joint, said hinged joint being located at a location towards the front at a distance of the center of area and operating means being present for effectuating the disconnection of the disconnectable connection by remote control.Type: GrantFiled: June 7, 1995Date of Patent: July 30, 1996Assignee: Vrijof Ankers Beheer B.V.Inventor: Rob Van Den Haak
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Patent number: 5511506Abstract: A marine anchor has an anhedral fluke with a shank attached thereto including an anchor line attachment point. A rear plate assembly behind the fluke is inclined at an obtuse angle .alpha. to the fluke and serves to provide a turning moment about the attachment point countering turning moments produced by friction effect on the fluke and the shank and by edge resistance during anchor burial to give improved anchor holding power while soil escapes the passage between the rear assembly and the fluke allows escape of sand and soft mud passing over the fluke. Peripheral edges of the rear assembly are shaped to cause rolling of the anchor to a burial position. An upturned toe portion at the front of the fluke encourages effective anchor operation in clay soils while also facilitating rock gripping by the anchor.Type: GrantFiled: February 7, 1994Date of Patent: April 30, 1996Assignee: Brupat LimitedInventor: Peter Bruce
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Patent number: 5474015Abstract: A marine anchor comprising a fluke and a shank attached to the fluke is intended for drag embedment in a mooring bed by pulling the anchor substantially horizontally via the shank. Further, it is a particular feature of the anchor that two modes of operation are possible through use of the line extending between the anchor cable attachment point on the shank and the fluke centroid being variable to provide a first line present for drag embedment of the anchor, and a second line utilized when the anchor is embedded, wherein the pulling force on the anchor via the shank can now be essentially upwards, thereby providing an increased holding force due to the increased fluke area presented in the direction of the upwards force. The change in direction from the first line to the second line can be achieved by having the shank pivotal and by providing pivot control members permitting selective pivoting of the shank.Type: GrantFiled: August 19, 1994Date of Patent: December 12, 1995Assignee: Brupat LimitedInventor: Peter Bruce
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Patent number: 5469802Abstract: A boat anchor includes a short arcuate shank having transversely extending plow-type flukes at one end and transversely extending ears at the other end. A metal cable connects to the rear end where the plow flukes are positioned, and extends to a constraining guide located on the shank between the flukes and the ears. The cable then extends through a longitudinally non-constraining front guide on the shank end near the ears of the anchor. The cable partially wraps around the shank in its path between the intermediate guide and the front guide. For use on rocky bottoms, the cable is disengaged from the intermediate guide. By attaching the cable to the shank adjacent to the plow flukes, pulling stresses from the cable are applied to the intermediate constraint and fluked end of the anchor. The shank between the ears and the intermediate constraint is not fully stressed and those portions can be made thinner and lighter without affecting the holding power of the anchor.Type: GrantFiled: June 22, 1994Date of Patent: November 28, 1995Inventor: Dragomir Ivicevic
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Patent number: 5404831Abstract: There is disclosed an anchor assembly comprised of a shank member on which are disposed cooperating fluke members which are rotably positioned on the shank member wherein each fluke member is formed with stabilizer portions capable of assuming a nestling relationship therebetween in deployed cooperation of the anchor assembly.Type: GrantFiled: December 2, 1992Date of Patent: April 11, 1995Inventor: Raymond A. Miller
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Patent number: 5396858Abstract: The present invention provides:an anchor comprisinga plough portion which is generally V-shaped in plan to taper from a broad portion at one end to a holding entering point at the other end, and which is generally V-shaped in cross-section transverse to the length of the plough portion between the ends,a shank attached to the plough portion and to which an anchor cable, chainrope or rode may be affixed, andtines extending from adjacent the broad portion of the plough portion in a generally forward direction.Type: GrantFiled: December 23, 1993Date of Patent: March 14, 1995Inventor: Rex W. Francis
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Patent number: 5353731Abstract: A marine anchor having a cylindrical hub member including a plurality of radially extending, peripherally spaced, rod-like flukes. The anchor further includes a rod-like supporting handle extending substantially coextensive with and spaced radially from the hub member. The supporting handle is configured to define oppositely disposed bails arranged to alternatively receive a slidably mounted ring attachable to an anchor line or rope, depending upon the position of the anchor.Type: GrantFiled: April 26, 1994Date of Patent: October 11, 1994Inventor: Rayohl E. Richter
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Patent number: 5188055Abstract: A boat anchor is disclosed including a fluke, having a relatively pointed tip portion and a relatively broad tail portion disposed rearwardly of the tip portion. A shank is fixed to the fluke rearwardly of the tip portion and extends forwardly of the tip portion to a distal end. The shank includes a generally longitudinal slot that extends from a first end proximate the distal end of the shank to an opposite second end located rearwardly of the anchor's center of gravity. The slot is slidably engageable by an anchor line and allows the anchor line to slide between the first end of the slot, wherein force may be exerted on the line to embed the tip of the fluke into the ground, and the second end of the slot, wherein force may be exerted on the line to pull the tip portion of the anchor out of the ground.Type: GrantFiled: January 8, 1992Date of Patent: February 23, 1993Inventor: Gary P. Kershner
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Patent number: 5140931Abstract: A boat anchor having a shank which is pivotally movable relative to the other elements is designed to provide three stop positions defining terminal positions of movement of the shank in each direction. A primary stop is provided by contact of a pin extending laterally through the shank with edge portions of the crown side, between which the shank is mounted. A secondary stop, operable upon failure of the primary stop, is provided by contact of the end of the shank adjacent the pin with inner surfaces of the crown heads. A tertiary stop, operable upon failure of the secondary stop, is provided by mutual contact of edge portions of the shank and crown heads.Type: GrantFiled: September 30, 1991Date of Patent: August 25, 1992Assignee: Jaquith Industries, Inc.Inventor: Richard D. Parks
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Patent number: 5138967Abstract: A marine anchor is described which has a shank having a leading end for attachment to a cable and a general double-bladed ploughshare shaped fluke fixed to the shank with the blades disposed symmetrically about the median plane of the shank. The leading ends of the blades terminate in a single apex and the trailing ends of each blade diverges outwardly from said medial plane, each blade having a generally inwardly dished shape. The blades can be curved or consist of at least two flat angled surfaces.Type: GrantFiled: November 1, 1990Date of Patent: August 18, 1992Assignee: Simpson-Lawrence Ltd.Inventors: Philip F. McCarron, James W. Stewart, Gordon M. Lyall
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Patent number: 5133277Abstract: An anchor having critically improved ability to penetrate and bury deep in mooring beds that can function well in a wide variety of mooring bed types is formed with a fluke component for burying into a mooring bed when it is cast on the bed and a shank component by which the anchor is attached to anchor rode. The fluke component is a contoured plate having identical starboard and port halves that increase in width from distal end to proximal end and meet in an apex at the center of the proximal end. The shank component has an elongated shaft bolted to a standard member above the plate with the shaft and the standard lying in a common plane with the longitudinal axis of symmetry of the plate. When the shaft is horizontal the plate is angled downward so its apex digs into the mooring bed when tension is applied to the anchor rode. Such angle may be varied to obtain maximum holding with different types of mooring beds.Type: GrantFiled: January 3, 1991Date of Patent: July 28, 1992Inventor: Andrew L. Peabody
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Patent number: 5086724Abstract: Anchor apparatus for use in various seabed conditions includes a fluke to which is secured a pair of shanks, a main shank and a retrieval shank, and a wedge having a cutting edge is secured between the fluke and the main shank. A burying plate with cutting edges is removably secured to the fluke. At the outer edge of the burying plate, remote from the fluke, there is a float to help insure that the anchor apparatus remains in an upward or predetermined orientation as it moves downwardly through the water and sets in the seabed. A handle may be secured to the burying plate to help in the manual operation of the anchor apparatus or in the movement of the burying plate as it is removed from the fluke. The anchor apparatus includes two shanks, a main shank and a retrieval shank. Anchor line or chain is secured to the retrieval shank.Type: GrantFiled: October 22, 1990Date of Patent: February 11, 1992Inventor: Ralph E. Schreiber
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Patent number: 5067430Abstract: An anchor including an axis control bar for holding a vessel in place. The anchor has a pair of planes extending from a crown made up of two flat vanes. An axis control bar is connected between the planes for providing enhanced structural strength and leverage for releasing the anchor from a set position.Type: GrantFiled: June 7, 1990Date of Patent: November 26, 1991Assignee: The Charles Henry Ford TrustInventor: Charles H. Ford
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Patent number: 5005508Abstract: An improved anchor assembly of the Danforth type. The crown is formed from a single piece of rectangular tubing by a pressing operation to form a crown having two parallel inwardly disposed sidewalls and, at generally right angles thereto, two sidewalls which extend towards each other in a forward direction. Right-hand and left-hand flukes are each formed from a single piece of metal plate material and have a triangular plate portion and flange portion which extends to either side of the plate portion at right angles thereto. Extensions of the flange are welded to the parallel sidewalls of the crown box. The rear end of a shank, which is formed from square bar stock, is disposed within the crown box with an aperture in the shank being in alignment with corresponding apertures in the flange extensions of the flukes and the parallel sidewalls of the crown box. A stock is inserted through the apertures so that the shank can pivot about an intermediate portion of the stock.Type: GrantFiled: September 20, 1989Date of Patent: April 9, 1991Assignee: The Crosby CompanyInventors: Peter W. Crosby, Henry W. Schenk
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Patent number: 4995326Abstract: An anchor comprising a fluke and a shank assembly, the latter including at one end, located at the front of the anchor, an element for attaching an anchor cable and being joined to the fluke at the other end, the fluke extending along a major plane and the shank assembly comprising two substantially elongated plate-shaped shank members which are joined at the one end and define inbetween a passage for anchor soil, wherein at least one element connecting the two shank members has been arranged in the passage. In order to improve the anchor's rigidity, the connecting elements each comprise one pair of crossing connecting parts, each part extending from the one shank member to the other shank member and comprising two portions arranged on either side of the point where the connecting parts cross. Also the passage for anchor soil through the anchor has been enhanced.Type: GrantFiled: November 30, 1989Date of Patent: February 26, 1991Inventor: Rob van den Haak
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Patent number: 4907523Abstract: The invention has as its object a drag anchor which is simple to manufacture and provides an effective grip in the bottom material where the anchor is to be used, besides which the anchor can be executed with a very low weight.The invention, which relates most particularly to a drag anchor, the shank of which is pivotally attached to its part which forms the fluke, is characterized in that its part (2) which forms the fluke consists of a hollow body (2) open at its front and rear end in the direction in which the shank (1) is towed, i.e. the direction of movement of the drag anchor, which body forms a mantle enclosing the rear part of the shank with an extension in the direction of movement of the drag anchor.Type: GrantFiled: July 5, 1988Date of Patent: March 13, 1990Inventor: Hans Claesson
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Patent number: 4856451Abstract: A marine anchor comprises a fluke with a shank attached to the fluke to enable the anchor to be joined to an anchor cable. Additionally there is provided a soil barrier plate located aft of the rear of the fluke but above the level of the fluke, with a soil passage between the barrier plate and the fluke. The barrier plate is set an angle to the fluke, and the barrier plate and the associated soil passage are arranged so as to function in a manner enabling the anchor to operate effectively and without adjustment in cohesive soils such as mud even when the fluke is set (say at an attack angle 0.degree. of 30.degree.) for optimum operation in non-cohesive soils such as sand, without substantially detracting from the performance of the anchor in non-cohesive (sand) soils.Type: GrantFiled: November 20, 1987Date of Patent: August 15, 1989Assignee: Brupat LimitedInventor: Peter Bruce
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Patent number: 4831952Abstract: A gliding anchor for mooring a vessel includes a central shank having a weighted forward end and a blade hinged to said shank. The blade is hinged to the shank by means of a pantographic linkage, the rear link being longer than the forward link to provide downward inclination of the blade when in its open position. The blade is provided with a pair of upswept wings extending on either side of the shank which serve to cause the anchor to glide when the blade is deployed in a first position wherein its longitudinal axis lies parallel to that of the shank. These wings are deployed as bottom engaging flukes when the blade is rotated downwards about the hinge to a second open position by a force being applied to the anchor line attached to the rear of the shank.Type: GrantFiled: October 22, 1987Date of Patent: May 23, 1989Assignee: Dumison Marine Pty. Ltd.Inventor: Philip W. Dulhunty
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Patent number: 4827863Abstract: An improved anchor having a shank and, pivotally connected thereto, a head consisting of a generally flat, arcuate body, a pair of flukes attached to the body and extending laterally from a plane of the shank and body, and a bottom penetrating nose portion, has the further features of the body and shank having a narrowed lead edge and the material of the shank and body being disposed in rectangular cross-sections having substantial ratios of height to thickness. The shank and body of the anchor thereby have a thin lead edge profile to facilitate passage of the anchor through a bottom surface to burrow into the bottom, and the shank has broad side surfaces to resist anchor dislodgement under side forces.Type: GrantFiled: September 8, 1987Date of Patent: May 9, 1989Assignee: Rule Industries, Inc.Inventors: Max Scholz, Scott Batchelder, Robert Dowding
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Patent number: 4802434Abstract: A marine anchor including a main fluke with a shank attached to the fluke. To enable the anchor to orientate on the sea bed from an inverted position to an upright working position, auxiliary flukes are supported by respective lugs upstanding from the fluke on either side of the anchor's vertical plane of symmetry. The auxiliary flukes extend laterally from the lugs and are inclined at an acute angle to the main fluke. The anchor includes support means arranged such that when the anchor lies inverted on a firm seabed one of the auxiliary flukes is located in position for digging in when the anchor is pulled forwardly.Type: GrantFiled: May 5, 1987Date of Patent: February 7, 1989Assignee: BruPat LimitedInventor: Peter Bruce
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Patent number: 4793276Abstract: An anchor with a shaft and a head portion made of high density lead and having a plurality of flukes extending radially from the head portion.Type: GrantFiled: October 22, 1986Date of Patent: December 27, 1988Inventor: Edward Stafford
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Patent number: 4785758Abstract: Apparatus for releasably mooring a marine vessel. An elongate anchor stem terminates at opposing ends with a swiveling connector assembly adapted for attachment to a boat anchor line and a fluke assembly. The fluke assembly includes a base plate with a plurality of curved anchor arms extending radially outwards therefrom, each terminating in a fluke. Each fluke defines a pair of opposing projections adapted to matingly engage a link of a connecting chain attached to one end of the stem and comprising a portion of the connector assembly. Upon such mating engagement a bridle is formed, whereupon exertion of upward force on the anchor line causes the anchor to more readily disengage from the floor of the water body and/or any foreign objects.Type: GrantFiled: May 9, 1986Date of Patent: November 22, 1988Inventor: Philip T. Eichelberger, Sr.
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Patent number: 4781142Abstract: The present invention is a drag embedment marine anchor having a fluke and shank which are fixed relative to each other during operation. The fluke is symmetrical about its central longitudinal axis and has two pointed front tips for penetrating soil. The elongated shank extends upwardly along the longitudinal axis of the fluke and is rotatably pinned to a trunion at approximately the geometric center of the fluke, to reduce the bending moment in the shank. The attitude of the shank is fixed relative to the fluke at various attitudes by a stopper, to accommodate different soil conditions. The fluke is wedge-shaped in side elevation, and has stabilizer fins protruding upwardly from a stern transom, the stabilizer fins extending beyond the top surface of the fluke to correct yaw. The fluke is formed from a hollow shell having a smooth top surface and a plurality of stiffening ribs depending from its bottom.Type: GrantFiled: February 20, 1987Date of Patent: November 1, 1988Inventor: Maxwell C. Cheung
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Patent number: 4732105Abstract: A boat anchor (10) includes three runners (11, 12, 13) having respective rear spikes (18, 19, 20) and front spikes (22, 23) for penetrating bottom material such as hard sand or mud. A bail (30) rolls the anchor onto the hooks. Flukes (32-36) are positioned on the runners (11, 12, 13) and induce drag through the bottom material which limits the movement of the anchor.Type: GrantFiled: November 28, 1986Date of Patent: March 22, 1988Inventor: Roger Fisher
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Patent number: 4706595Abstract: An anchor having a V-shaped twin shank with its legs composed of flat shapes in planes substantially parallel to the fluke so that the soil moves as through a tunnel for sliding penetration which is kept in a straight course due to stabilizer ear plates at a forwardly opening angle at the rear corners of the fluke.Type: GrantFiled: April 22, 1985Date of Patent: November 17, 1987Inventor: Rob van den Haak
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Patent number: 4704982Abstract: What is proposed in accordance with the invention is a sea anchor so arranged, after having been dropped, as to be capable of gliding obliquely forwards through the water along a flat, inclined plane so as to land on the bottom in a holding position at a considerable horizontal distance from the boat or vessel which dropped the anchor. For this purpose the shank of the anchor is combined with a transverse wing corresponding to the pair of arms of the conventional anchor. The wing has a marked `V` form and is noticeably swept back, causing it to adopt a stable attitude during its glide through the water, in conjunction with which it takes with it an achor rope which further stabilizes its glide. The wing as a whole is preferably pivotally connected to the anchor leg, for example by means of a pivot bolt, in which case the central section of the wing is extended rearwards to a spade-like, tapering structure which ends in a point.Type: GrantFiled: April 11, 1986Date of Patent: November 10, 1987Inventor: Agge Sahlberg
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Patent number: 4679348Abstract: A game trap drag having arms, flukes, and a penetration enhancement/antihitching member oriented in relation to each other and the drag shank such that the drag more effectively penetrates the earth's surface when the trapped animal attempts to drag the trap away from the set location. The penetration enhancement/antihitching member raises the crown of the trap drag above the horizontal of the earth's surface providing an improved ground engagement angle. The penetration enhancement/antihitching member further functions to prevent the trap-to-drag chain from becoming hitched around the drag.Type: GrantFiled: September 29, 1986Date of Patent: July 14, 1987Inventor: Eddie L. Wimberley
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Patent number: 4602588Abstract: An anchor for boats comprises a hollow body having an outer shell of molded resinous plastic material. The body includes an integral stem having a lower end integrally joined to a ballast chamber elongated to extend transversely of the stem in opposite directions. A pair of claws are integrally formed to project transversely outwardly of the ballast chamber and transversely of the stem axis for engagement with a supporting bottom surface under water. The outer shell is designed to withstand loads imposed by an anchor line between the stem and a bottom engaging fluke or claw. Ballast material such as metal punchings and scrap pieces, and/or concrete is carried in the shell to provide sufficient anchor weight for causing the flukes or claws to bite to dig into the underwater bottom surface and hold.Type: GrantFiled: September 14, 1984Date of Patent: July 29, 1986Inventor: John A. MacLean
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Patent number: 4592300Abstract: The present invention relates in one aspect to an anchor comprising a shank portion and a stock portion, the stock portion extending through a first aperture in the shank portion and extending laterally of the shank portion when in use, but being demountable so as to be removable from the first aperture in the shank entirely or so as to be moveable in the first aperture to a position where it can be orientated substantially in alignment with the shank, wherein the stock is fitted with a keeper which in the operative position of the stock, is engageable with a second aperture in the shank of the stock spaced from the first aperture, said keeper being provided with means to enable it to be retained in the second aperture.Type: GrantFiled: August 13, 1984Date of Patent: June 3, 1986Inventor: Harley E. Swarbrick
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Patent number: 4579077Abstract: A simple yet rugged and reliable collapsible anchor in an anchor assembly is disclosed for use with various small craft which are susceptible to damage by a conventional anchor stowed aboard or by the anchor being fouled when there is a swift current. The anchor is a stock anchor in which both the stock arms and the flukes are foldable alongside the anchor's hollow shank so as to be sheathed in a sheath from which the anchor is released when it is cast. A release mechanism is provided within the anchor's hollow shank which mechanism allows the anchor to be either self-tripped, or manually tripped, by exerting a pulling force of predetermined amount, which force required is adjustable; the mechanism obviates the use of shear pins.Type: GrantFiled: October 12, 1984Date of Patent: April 1, 1986Inventor: Jack A. Soules
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Patent number: 4577581Abstract: An anchoring device according to the invention, for a floating installation, to which the device is attached by an anchoring line. The device comprises at least two anchors of plowshare type (1 and 2), disposed side by side and attached by crossmembers (4 and 5) to rigid shanks (6 and 7) and an anchoring plate (12) attached to the free ends of the shanks (6 and 7). The use of the device is in the anchoring over long periods of time of floating installations such as floating installations of drilling, of production, barges, pontoons, buoys, and other such installations.Type: GrantFiled: August 31, 1983Date of Patent: March 25, 1986Assignee: Societe Nouvelle Construction Metalliques de ProvenceInventor: Alain Puech
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Patent number: 4543904Abstract: Self-clearing anchor (10) having one or more arms (13) hinged to the stem (11), in the vicinity of the crown (12) of the anchor (10), cooperating with biassing member (17) to counteract the rotation of the arms (13), the arms being adapted, when subjected to a determined stress, to collapse beyond the crown (112) of the anchor (10). In the anchor, the biassing member (17) can be adjusted by appropriate regulation member (19).Type: GrantFiled: March 23, 1983Date of Patent: October 1, 1985Inventor: Francesco Puoti
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Patent number: 4523539Abstract: An improved boat anchor assembly to prevent anchor snags and loss of the anchor including an anchor chain attached to a sleeve movably positioned around a shank extending from the anchor. The sleeve automatically locks to the shank in a predetermined manner changing the pivot point of engagement of the anchor chain and the shank effectively freeing the anchor from entangling snags.Type: GrantFiled: December 15, 1983Date of Patent: June 18, 1985Inventor: Gerald M. Granger
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Patent number: 4433635Abstract: A single fluke anchor for ships, structures built floating on or in the water, buoys, fishing nets and the like comprising a fluke formed integral to a shank, a stabilizer located behind the fluke and formed integral with the fluke and perpendicular to the shank, and triggers arranged integral to the both sides of the curved portion of the shank, whereby big holding power can be provided together with operation easiness.Type: GrantFiled: October 25, 1982Date of Patent: February 28, 1984Assignee: Kyuroku CorporationInventor: Soroku Takahashi
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Patent number: 4397256Abstract: A shank is provided for an anchor, which is in the form of a longitudinally extending double-plate girder with a transverse element joining the double plates. In accordance with the present invention, the transverse element is substantially spaced from the cable attachment end of the shank and is orientated with a positive attack angle so that the element can contribute to the burial force developed by the anchor. The above double-plate girder shank on the one hand provides increased resistance to bending moments in vertical and sideways directions and on the other hand enables satisfactory soil penetration by the shank due to the open construction. A plurality of the above transverse elements are preferably provided and form with the double plates passages diverging aft. The double-plate shank can be removably attached to the fluke.Type: GrantFiled: August 16, 1982Date of Patent: August 9, 1983Inventor: Peter Bruce
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Patent number: 4385584Abstract: An improved boat anchor assembly including an anchor shank having a pair of penetrating flukes pivotally connected thereto and supported for angular displacement about an axis normally related to the longitudinal axis of the shank, motion limiting stops mounted on the shank for arresting pivotal motion of the flukes relative to the shank, said shank being provided with a pivotal coupling interposed between the ends thereof and a shear pin for imparting stability to the shank and adapted to give way under angularly applied loads of predetermined magnitudes whereby the shank is permitted to "break" for facilitating recovery of the anchor, and releasable coupling means including a single non-load bearing pin for releasably locking said flukes and said shanks into an integral configuration whereby the anchor readily may be disassembled for compact storage.Type: GrantFiled: July 15, 1981Date of Patent: May 31, 1983Inventor: Lee S. Simpson, III
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Patent number: 4346663Abstract: An anchoring system wherein the anchor comprises a plate. An anchor line is connected to the plate by a flexible connection located ahead of the center of mass of the bearing surface of the plate in the direction of displacement thereof when being positioned. The plate is further adapted for facilitating penetration into the ground whereby the entire anchor penetrates into the ground.Type: GrantFiled: January 2, 1980Date of Patent: August 31, 1982Assignee: Institut Francais du PetroleInventors: Pierre Habib, Minh P. Luong