Abstract: An adjustable extension assembly for a downspout includes a fixed piece attachable to the lowermost end of a downpipe, a rotatable collar attached to the fixed piece, and at least one extension pivotally attached to the rotatable collar. Additional slidable members may be telescopingly attached to the extension. The extension members are channel-shaped in cross-section. The extension may be composed of a polymerized material or a metal. In addition to being easily attached to a downspout, the adjustable extension of the present invention may be selectively adjusted for fitting, for selective water deflection, and for proper lawn maintenance.

Abstract: A resilient edge adapter is provided for defining an edge of a drainable athletic playing surface formed of a moldable material. The edge adapter includes a base portion for cooperably engaging an upper portion of a drainage channel and an upstanding portion extending upwardly from the base portion for restraining the moldable material when applied adjacent to the drainage channel, thereby defining an edge of the athletic playing surface. The upstanding portion may be formed of a resilient and elastically deformable material and the base portion may include an elongate continuous plug portion to cooperably engage a corresponding slot defined in the upper edge of the channel. An edge adapter is also provided which has a pair of upstanding portions extending upwardly from a base portion for forming a running track surface over both opposed edges of a grate. Associated methods for forming athletic playing surfaces are also provided.

Abstract: A trench liner system used for forming a dual containment trench and for relining an existing trench has a primary liner and a secondary liner means extending along the length of the trench, a separating means is disposed between the primary liner and the secondary liner. A means for holding the primary liner, the secondary liner and the separating means against the trench walls has a vertical member having an upper end and an opposite lower end, with a first horizontal member extending from the upper end and terminating in a first edge. A first wall depends from the first edge and a second horizontal member extends from the lower end away from the first horizontal member. The second horizontal member terminates in a second edge having a second wall depending therefrom. The outer surface of the vertical member and the upper surface of the second horizontal member form a ledge adapted to receive grates and covers.

Abstract: A raingutter leaf guard assembly 8 is mounted on top of a typical raingutter 56 to prevent leaves from passing through a grid 12. A hinge portion 24 permits raising the leaf guard assembly 8 when an angled rod 30 affixed to a long pole 32 is mated to a funnel shaped opening 28 in lever 26. A downward pull of pole 32 from ground level raises the leaf guard assembly 8 and dumps leaf debris to the ground. Assembly 9 is comprised of an elbow 44 permanently connected to a raingutter end cap 38. A long pipe 52 is connected to the elbow 44 from ground level. A female duplex hose bib adaptor 54 completes the pipe thread 50, and garden hose thread 55 connections, thereby flushing a gutter clear of debris. All raingutter maintenance is performed on the ground.

Abstract: A trench liner system used for lining a single containment trench and for forming a dual containment trench from a single containment trench comprising a primary liner means within the trench supported by a separating means between the primary liner and the trench walls and bottom, and a means for holding the primary liner means and the separating means to the trench walls. The separating means comprises a plurality of pairs of elongated members disposed along the trench such that the rear surface of each elongated member is in contact with one wall of the trench and the underside surface of each member is in contact with the bottom of the trench. The elongated members are in opposed relationship to each other. The length of the lower portion of each elongated member is less than one-half the width of the bottom of the trench so that a gap is formed between the distal edges of the lower portions to position therein a means for detecting a leak in the primary liner.

Abstract: A method for cutting first and second complementary foamed plastic bodies of a predetermined shape from a single workpiece includes the step of moving a linear cutting element through the workpiece. The linear cutting element, such as a heated wire, is moved through the workpiece to form a first surface which forms a portion of the predetermined shape of the first and second foamed plastic bodies. The workpiece is thereafter shifted in position relative to the linear cutting element and the linear cutting element is again moved through the shifted workpiece to form a second surface. Due to the shifting of the workpiece, the first surface is sloped relative to the second surface. The first and second foamed plastic bodies are preferably first and second trench forms defining the shapes of different sections of a trench drain which has a continuously sloped bottom surface.

Abstract: A trench liner system used for forming a dual containment trench and for relining an existing trench has a primary liner and a secondary liner means extending along the length of the trench, a separating means is disposed between the primary liner and the secondary liner. A means for holding the primary liner, the secondary liner and the separating means against the trench walls. The separating means also includes a perforated plate in contacting relationship with the lower edges of the opposed elongated members under which a means for detecting a leak in the primary liner is positioned. The separating means has a plurality of ribs spaced between the liner means so that a cavity is formed between the primary liner means and the secondary liner means between the ribs.

Abstract: A grate attachment fixture is disclosed which rotationally engages a locking bar with the opposed sidewalls of a drainage channel and which thereafter secures a grate to the drainage channel. The grate attachment fixture includes a rotatable connector adapted to adjustably interconnect the locking bar and the grate. The grate attachment fixture also includes a grate securing member affixed to the locking bar. The grate securing member includes a pair of adjustment surfaces including a positive engagement surface for engaging a portion of the connector such that upon rotation of the connector in a first angular direction, the locking bar initially rotates within the trench in the first angular direction until the first locking bar engages the opposed sidewalls. Thereafter, the positive engagement surface cooperates with the connector to apply a tensile force between the grate and the locking bar upon further rotation of the connector.

Abstract: A system for forming a single-walled trench comprising a pair of frame members, each having a horizontal section and a section depending from the horizontal section; a collapsing pair of wall pans having sidewalls interior to the depending portion of the frame members, a bottom floor disposed between the sidewalls, a releasing mechanism to collapse inward the sidewalls, a device which collapses the sidewalls inward and removes the entire bottom and sidewalls from the poured trench leaving the frames embedded securely in the concrete; and adjustable anchoring means attached to the frame members for providing vertical adjustment of the frame members relative to the ground and each other, leaving all but the frame members available for re-use.

Abstract: An improved trench drain or so-called channel drain system is disclosed which provides a universal drainage unit, preferably formed of injection molded plastic in a standard length, for installation in concrete floors, airport areas, driveways, service station aprons, EPA-mandated on-site collection and disposal areas, and the like. The trench drain unit terminates at one end in a female end and at the other end in a male end. Such drain ends can respectively receive male and female end caps, whereby the drain operates as a single unit drain, or instead can receive the molded interlocking male and female ends of an adjacent trench drain unit, whereby a connected series drain system is created. The mating interlocking male and female ends so encapsulate one another as to create a substantially watertight connection. Drain openings covered by knock-out membranes, with downwardly-extending pipe flange connectors, are located proximal each respective end of the universal drain unit.

Abstract: A drainage channel system for forming a trench is disclosed according to the present invention. The drainage channel system includes a number of precast drainage channel sections and one or more alignment keys for aligning and interlocking adjacent drainage channel sections. Each alignment key includes first and second opposed, inwardly facing jaw members shaped for longitudinally bridging across a predetermined exterior portion of adjacent first and second sidewalls, respectively, of adjacent drainage channel sections. Accordingly, each jaw member engages the predetermined exterior portions of the respective sidewalls to longitudinally interlock the drainage channel sections. In particular, each jaw member includes opposed clamping tabs having longitudinally opposed surfaces which apply a longitudinally compressive force to the adjacent drainage channel sections.

Abstract: A portable runoff water diverter can be placed in the path of a flow of runoff water to divert at least a portion of the water to a point where it can advantageously be used, for example to irrigate landscaping. The diverter defines at least one channel through which runoff water, that might otherwise flow to a sewer, is redirected. The diverter advantageously is made of a resilient material such as rubber, so that it may be used in an alley or along a curb, where a flow of runoff water occurs in response to rain, without being destroyed should it be run over by a vehicle.

Abstract: A modular assembly of channel sections (2) is disclosed which are connected to one another for providing a drainage system by a shutter coupling between a groove 24 formed at one end of any channel section and a rib (6') formed at the other end. Channel section (2) has a modular construction as it is provided with a number of parallel ribs (6') extending in a plane perpendicular to the length of the section at regular intervals so that the length of the final assembled channel can be changed by varying the coupling of the sections. Further anchoring ribs (6) are provided near ribs (6'). A shutter head member (26) coupled at either end of channel section (2) and having a dead but easily pierceable pipe fitting (30) is also provided.

Abstract: The invention provides a drainage channel preferably formed from a sheet material, such as stainless steel. The channel has a flat bottom and upwardly extending sidewalls that form an acute angle with the bottom. A pair of shoulders extend outwardly from upper portions of the sidewalls for receiving a grate. Upper edge walls extend upwardly from outer portions of each shoulder. The exterior width of the channel at its bottom is less than the interior width or the channel between the upper edge walls, but greater than the interior channel width between the upper ends of the sidewalls. Consequently, the drainage channel can be mechanically anchored in concrete without requiring use of additional anchoring elements, and is also stackable.

Abstract: A trench forming assembly and removable form for forming a trench of predetermined shape is disclosed according to the present invention. The removable form includes an elongate form body having top, bottom and opposed side surfaces and first and second elongate form removal slots extending upwardly from the bottom surface of the form body. Preferably the removable form has a top surface defining a complex shape including at least a first upwardly extending ear portion which extends longitudinally along the top surface. At least a first form removal slot of this elongate form body extends into a portion of the first ear portion. Advantageously, the form body includes a pair of coplanar elongate slots integrally formed in the side surfaces for receiving a pair of frame members in a predetermined coplanar, spaced relationship above the bottom surface of the form body.

Abstract: A means for securing a cover to a drainage channel body defining a drainage channel and wherein said channel body defines at least two cutouts located substantially opposite one another in inner side walls defining said channel comprises at least one cross-bar and a fixing means. The cross-bar defines two ends that can be inserted respectively into said cutouts so that the cross-bar is disposed transversely across the drainage channel. A clamping means is located at at least one of the ends of the cross-bar to retain the cross-bar in place after insertion of its ends into the cut-outs. The fixing means attaches the cover to the channel body by way of attachment of the cover to the cross-bar.

Abstract: Surface drainage apparatus comprises a channel body defining a drainage channel with a cover defining apertures through which drainage can pass into the drainage channel. A fixing means is provided for attachment of the cover to the channel body and comprises a first fixing element for attachment to the channel body and a complementary second fixing element for attachment to the cover. The channel body defines at least one universal receiving aperture into which one of a plurality of differently constructed first fixing elements is capable of being located both before and after installation of said surface drainage apparatus. In this way both the production costs and the operating costs of the surface drainage apparatus can be reduced, especially when conversion is necessary.

Abstract: A reusable support structure for installing a trench liner in a trench formed in the ground, and a method for doing so. The support structure includes a crossbar having two ends and spanning the trench. The top end of a threaded rod is adjustably connected to the crossbar by a nut threaded onto the rod above the crossbar. The bottom end of the threaded rod is connected to the bottom or floor portion of the liner by a nut threaded onto the rod below the bottom floor portion of the liner, the threaded rod thus passing through the liner floor. A plurality of these trench liners are installed in the trench, and are connected together by one or more tabs at one end of each trench liner that coact with the opposite end of the next adjacent trench liner to connect the two trench liners together. The top nut then rests on the crossbar, supporting the rod, and in turn the trench liner, at the proper height in the trench, the height being adjustable by turning the nut.

Abstract: Apparatus and method for sparging ground water by developing density driven convection and promoting the physical removal and biodegradation of contaminants. The method includes providing a well casing having two fluid permeable sidewalls separated by a fluid impermeable sidewall, and inserting the well casing into a generally vertical borehole so that the fluid permeable sidewalls are positioned below the water table. An injector tube is provided in the well casing so that a lower end thereof is located at the lower end of the well casing and below the level of ground water collected in the well casing. Gas under pressure is forced out the lower end of the injector tube and into the ground water collected in the well casing to cause the gas to carry water upwardly within the well casing and out the well casing through the uppermost fluid permeable sidewall.

Abstract: The invention is directed to a process of forming a ditch liner by dispensing a solidifiable liquid mixture onto a continuously moving porous blanket, applying pressure against the mixture and the coated blanket to form a continuous matrix within the blanket, laying the resulting coated blanket into a ditch before the liquid mixture has fully cured, conforming the coated blanket to the shape of the ditch, and allowing the mixture to fully cure. The improvement resides in using a reaction mixture of a polyisocyanate, up to 60% by weight of a filler, a specified polyol mixture and, optionally, a catalyst. The polyol mixture requires three different propylene oxide adducts: i) a propylene oxide adduct of an alkanolamine, ii) a propylene oxide adduct of a low molecular weight organic compound having from 3 to 8 OH groups, and iii) a propylene oxide adduct of a low molecular weight diol.

Abstract: A trench forming assembly for forming a trench of predetermined shaped is disclosed according to the present invention. The assembly includes a pair of parallel elongate frame members for defining a support surface for supporting a trench cover. The assembly also includes an elongate form body for shaping a hardenable trench forming composition into the predetermined shape of the trench and having opposed side surfaces with which the frame members may be engaged. The trench forming assembly further includes at least one pair of upwardly extending legs for anchoring the frame members in a predetermined location. Each upwardly extending leg is joined at a top portion to one of the frame members and is joined at a lower portion to a corresponding leg for forming a generally U-shaped structure. The generally U-shaped anchoring leg structure maintains engagement of the frame members with the side surfaces of the form body.

Abstract: An assembly (10) for forming a trench (T) includes one or more frame members (16) that cooperate with a removable form (12) around which a moldable trench forming composition (C) is poured. The form is made of deformable buoyant material such as expanded polystyrene. Rebar legs (18) are attached to the frame members to provide secure anchoring of the frame members to both the ground (E) and in the trench forming composition. Preferably, each frame member includes a horizontal leg that is received in a slot (22) formed in one of the opposing side walls of the form. The cooperating engagement between the frame member (16) and the form provides longitudinal support to prevent the buoyant form (12) from lifting within the trench composition (C) while also maintaining the proper spacing and planar alignment of the frame members. Wire strands (28) are placed within cooperating guide tracks (24) in the opposed ends of the form.

Abstract: Used motor vehicle tires are subjected to a pair of radial severing cuts and thereby a peripheral segment of each tire removed. The tire remainder portions, generally constituting 1/2 to 1/3 of the original tires, are then aligned side by side and connected to form an extended drainage construction which may be utilized in place of conventional larger drains with the effect of ameliorating soil erosion and washaway problems.

Abstract: An assembly (10) for forming a trench (T) includes one or more frame members (16) that cooperate with a removable form (12) around which a moldable trench forming composition (C) is poured. The form is made of deformable buoyant material such as expanded polystyrene. Rebar legs (18) are attached to the frame members to provide secure anchoring of the frame members to both the ground (E) and in the trench forming composition. Preferably, each frame member includes a horizontal leg that is received in a slot (22) formed in one of the opposing side walls of the form. The cooperating engagement between the frame member (16) and the form provides longitudinal support to prevent the buoyant form (12) from lifting within the trench composition (C) while also maintaining the proper spacing and planar alignment of the frame members. Wire strands (28) are placed within cooperating guide tracks (24) in the opposed ends of the form.

Abstract: A collector plate for attachment at the roof edge of a building which includes a strainer to prevent the debris from entering the gutter trough or pipe. The collector plate includes a collector plate, having a flat section to collect the rain from the roof, a arcuate section to direct the water into a vertical direction, a down lead section to accelerate the speed of the water, before it encounters the strainer, which separates the debris before the water enters the pipe.

Abstract: A method and apparatus for forming a trench with grates or solid covers comprising an outer shell which is disposed between opposed frame members at a certain position, within a ditch and an inner core that is received within a channel in the shell. The core aids in providing rigidity to the shell while concrete hardens about the outer surface of the shell. After the concrete or other encasing material sets, the core can be removed from the shell which then enables the shell to be more easily displaced from the formed trench. One end of a core can project outwardly from an end of its shell so as to be received within the space formed in the rear of the channel of an abutting shell which, likewise, has its core projecting beyond its front end wall, thereby helping to align the shells within the trench.

Abstract: A method and apparatus for forming a trench with grates or solid covers, comprising an outer shell which is disposed between opposed frame members at a certain position within a ditch and an inner core that is received within a channel in the shell. The core aids in providing rigidity to the shell while concrete hardens about the outer surface of the shell. Rods are vertically driven through the core and the outer shell into the bottom of the trench to stabilize the forms while the concrete or other setting material is poured into the trench. The rods are removed before the material hardens. After the encasing material sets, the core can be removed from the shell which then enables the shell to be more easily displaced from the formed trench.

Abstract: An assembly (10) for forming a trench (T) includes one or more frame members (16) that cooperate with a removable form (12) around which a moldable trench forming composition (C) is poured. The form is made of deformable buoyant material such as expanded polystyrene. Rebar legs (18) are attached to the frame members to provide secure anchoring of the frame members to both the ground (E) and in the trench forming composition. Preferably, each frame member includes a horizontal leg that is received in a slot (22) formed in one of the opposing side walls of the form. Wire strands (28) are placed within cooperating guide tracks (24) in the opposed ends of the form. The wire strands are pulled through to deform the form after the composition has hardened.

Abstract: A system for forming a multi-walled trench comprising an outer wall, an inner wall disposed within the outer wall and along which the fluid to be contained flows, means for securing in position the inner wall so as to allow expansion and contraction thereof relative to the outer wall and means for vertically adjusting the trench relative to the surface elevation prior to the pouring of concrete. Various embodiments of the securing means are provided.

Abstract: A process for forming notched irrigation laterals uses a construction laser adapted to propagate radiation along a planar path, and a device that both detects the radiation and is used to manually form notches in the lateral. The laser is positioned relative to the longitudinal axis of the lateral so as to minimize optical interference during the formation process.

Abstract: A clip-type support for use in installing trench drain systems. The clip device has two clip structures spaced from each other along a central web to engage, clamp and support two inter-engaging end portions of adjacent drain channel sections. A middle portion of the clip device separating the two clip structures has two deformable tabs, each located on opposite sides of the web. The tabs have apertures for engaging support rods which support the clip and drain channel sections within a trench in which the trench drain system is being installed. By deforming the tabs, the apertures are aligned relative to the rods thereby allowing the clip to move along the rods to align the adjacent drain channel sections. When the tabs are not deformed, the apertures are not aligned thereby locking the clip in place relative to the rods.

Abstract: A safety trench drain conduit formed of first and second trench drain elements each in the form of an open top channel having imperforate bottom and sidewall portions. The first trench drain element is located and retained within the second trench drain element and is constructed and arranged to allow liquid access thereto from outside the second trench drain element. The second trench drain element bottom and sidewall portions envelope those of the first trench drain element. The second, outer, trench drain element sidewall portions include transverse surfaces above and laterally outward of and sloped inwardly toward the first trench drain element to direct any seepage near the entrance of the trench drain toward the open top of the first trench drain element.

Abstract: A drainage channel comprising a channel body which is U-shaped in cross-section and defines a concave base and integrally formed opposing first and second vertically spaced-apart side walls, the first and second side walls including respective crowns formed in upper free ends of the side walls. The upper free end of the side walls define a predetermined thickness between respective inner side wall surfaces and outer sidewall surfaces. The outer surfaces of the side walls define an elongate detent spaced below the upper free ends of the first and second side walls and extending along at least part of the length of the channel body and defining an area of reduced thickness below the relatively thicker free ends of the first and second side walls. A coping encloses the crown of a respective side of the channel body. The coping includes an inner leg for resting against the inner side wall surfaces of the channel and an outer leg for resting against the outer side wall surfaces of the channel.

Abstract: A modular trench drain system comprising generally V-shaped channels, generally L-shaped grate frames, support anchors, and a grating which are arranged so as to result in a trench drain system tailored made for an individual site.

Abstract: A channel section is of generally U-shaped cross-section and is made from glass fibre reinforced concrete. The section can be thin and light and easily man-handled. In order to provide the section with sufficient rigidity during the setting of a concrete back fill around the section, a framework of reinforcing bars is provided spaced from the reinforced concrete channel member by tie bars. The reinforcing bars and tie bars form a rigid composite structure with the fibre reinforced concrete member which keeps the member rigid while the concrete back fill is drying and which forms a reinforcing structure in the concrete after drying.

Abstract: An eavestrough fitting according to the present invention comprises a body portion of a shape generally corresponding to the eavestrough to be axially received therein, with a fitting on the interior surface including an abutment member positioned to limit the extent to which an eavestrough is axially inserted within the fitting. Retaining tabs extend above and project outwardly from the abutment member and define a slot like opening between the retaining tabs and interior surface of the fitting into which an end portion of the eavestrough is inserted and retained. A sealing arrangement is moulded to the fitting on the interior surface of the fitting in front of the retaining tabs and forms an effective seal between the lower surface of the eavestrough and the eavestrough fitting. This fitting allows for an effective method of joining lengths of eavestrough, whether they be symmetrical or nonsymmetrical, and positively retain the eavestrough within the fitting.

Abstract: A sidewall extension member for use with a drainage channel system of the type characterized by a plurality of drainage channel segments of progressively greater depth adapted to be interlocked end-to-end to provide a below grade gravity feed sloping drainage run of a predetermined length, each of the channel segments comprising a pair of opposing, spaced-apart side walls, a bottom wall connecting the side walls adjacent one end thereof, and a top opening opposite the bottom wall, the side walls and the bottom wall defining a fluid carrying space therebetween and the top opening defining a fluid entrance adapted to receive a grate. The sidewall extension member includes first and second sidewall extension panels formed of a cementitious material for being positioned on and received and supported by respective side walls of the drainage channel in longitudinally extending alignment therewith.

Abstract: A device for forming a trench having a pair of frame members each having a first adjustment slot therethrough, a form pan having sidewalls, the sidewalls having an adjustment slot in registration with the first adjustment slot of the frame members, and means for adjustably securing the form pan to the frames through the first and second adjustment slots to allow positioning of the form pan relative to the frames.

Abstract: A method and apparatus for constructing a grate or solid covered trench is provided, having a "Z" type frame made positionally adjustable by an adjustment slot and fastening means combination, and a trench-form construction achieving stability by means of a number of box-shaped bracings positioned along the trench-form sidewalls. The positions of the bracings are staggered to provide both a supporting surface to the frame and stability to the lower regions of the sidewalls.

Abstract: A device for forming a trench having a pair of frame members, connecting rods disposed between the frame members to maintain the frame members in a fixed position relative to each other, anchoring means attached to the frame members for positioning the frame members relative to the ground and a form removably held in a fixed position between the frame members having an upper surface and a shaped lower surface, the shaped lower surface providing means for molding a moldable trench composition into the shape.

Abstract: There is provided a new and useful propagation assembly consisting of at least one propagation tray comprising a lower plant support section including at least one longitudinal channel for nutrient solution flow; and an upper space section having a series of spaced openings positioned longitudinally above each at least channel.

Abstract: An elongate safety conduit or trench for receiving chemical liquids, having first and second preassembled conduit elements, the first located and retained within the second. A space is between the two at the bottom for collecting liquid that may leak through the first. A seal along the length of the conduit between the two elements inhibits entry of liquid between the two.

Abstract: A gutter protector adapted for mounting on a sloping shingled roof for attachment under the next-to-last row of shingles and extending at an inclination to the roof with perforations for flow of water through the gutter protector directly into the gutter and onto the roof and into the gutter. There are a series of alternating perforated sections and imperforate sections that are relatively inclined to cause change of direction of flow to facilitate flow of water through the perforations and to facilitate lifting and washing of leaves and debris from section to section and off the gutter protector away from the roof. An outer end portion extends upwardly from the gutter to obstruct view of the other sections from ground level.

Abstract: Structure and a method for installation of drain conduit whereby the drain conduit is positioned at a proper elevation with respect to an adjacent surface in a floor or parking lot or the like. The drain conduit is positioned within a trench. Support structure of this invention supports the drain conduit in the trench as concrete or other solidifiable material is poured into the trench to support and to secure the position of the drain conduit. Then after the concrete has partially solidified and is capable of support of the drain conduit, the support structure of this invention is removed and is reused in another installation.

Abstract: Floor drainage systems in locations using a relatively large amount of water are usually covered with expanded metal gratings which easily become blocked and do not allow sufficient support for relatively heavy vehicular traffic to pass thereover. The present device utilizes a culvert section having spaced apart upper angle members and a sheetmetal culvert depending there below, the depth of which gradually increases from one end to the other. Location tabs extend from the sides of the culvert along the length thereof and these are all spaced the same distance downwardly from the upper angle members so that the sections are all readily supported upon pegs placed along the trench at the same depth from the surface. Concrete may then be poured around and under the culvert and the floor surface finished flush with the upper surface of the angle members so that only an elongated slot is seen when the installation is completed.

Abstract: A method and apparatus for the repair of leaky gutters by the installation of a semi-conforming, resilient liner. The liner material is selected for its ability to readily form durable watertight joints with adjoining pieces of similar material, or to itself, to provide a watertight conveyance to the downspout for runoff water. The resiliency of the material is selected such that the liner is generally semi-conformal in order to prevent seepage of water between the liner and the gutter, and to allow easy handling and installation. Finally, the liner presented when installed is durable enough and inexpensive enough to make lining of the gutters to repair the leaks more cost effective than replacement of the leaky gutter with new ones. In one embodiment, PVC material and bonding agents, similar to those commonly used in plastic pipe plumbing, are selected for use.

Abstract: A drainage channel is shown which features a body having complementary ends which, in abutting relationship, form interlock with adjacent channel bodies when joining the channel bodies together; and an edge protective frame device for the upper free rims or edges of the channel side walls comprising a web resting on top of the channel side wall and two anchor legs extending downwards from and linked by the web and proceeding in the same direction and distance, at least one of which anchor legs is flush with its respective channel side wall and between the two of which legs the material of the upper part of the channel walls is formed; and a mounting leg for a channel cover, extending upwards from the outer edge of the web.

Abstract: A covering system for canals to minimize evaporization loss from water transportation canals. The system comprises a plurality of strips of liquid impervious materials of predetermined length adjacent one another forming a section. The strips are secured to a transverse support at one end of each section. The strips float on the canal surface in both a flowing and quiescent condition. The sections of strips are spaced so that in the direction of flow adjacent sections overlap a predetermined distance to accomodate fluctuations in the water level in the canal.

Abstract: A flexible drainage gutter for use under a horizontal surface having moisture accumulation or leaks under cracks or expansion joints. A flexible, waterproof membrane is attached along its elongated edges to rigid flanges which can be attached to the horizontal surface itself or to support members attached to the surface. The width of the membrane can vary so that the membrane hangs down from the flanges a greater distance downstream than upstream, thereby providing for the slope of the gutter. Alternatively, the wall portions of the flanges, to which the edges of the membrane are attached, can vary in width while maintaining the width of the membrane constant to provide for the slope of the gutter.

Abstract: A drainage channel system is disclosed which is characterized by a plurality of drainage channel segments (30) of progressively greater length adapted to be interlocked end-to-end. Each channel segment (30) comprises a pair of opposing, spaced-apart sidewalls (31), (32), a bottom wall (33) connecting the sidewalls (31), (32) adjacent one end and a top opening opposite bottom wall (33) defining a fluid entrance adapted to receive a grate (37). A sidewall extension (10) is provided for being mounted on top of each of the sidewalls of channel segment (30) along at least a part of the length thereof to effectively increase the total depth of each channel segment (30) and increase the length of a continuously and progressively sloping run of the drainage channel system.