Abstract: A locking device for manhole inner covers is disclosed. The locking device is operated only by an authorized key thus almost completely protecting the underground arrangements such as pipes, drains or wires from unauthorized persons, who intend to reach the arrangements with the object of damaging or breaking the arrangements. The locking device is cased by a longitudinal channel type housing. Two reciprocating units are arranged in the housing so that the arrangement of the units inside the housing is point-symmetric about the center of the housing. Each unit has a plurality of regularly-spaced gear holes, which selectively engage with the asterisk part of a key. A locking bolt is coupled to each reciprocating unit and fully projects or retracts from or into the housing. A keyhole panel is movably seated on a central member so that the keyhole panel can move in a vertical direction. The keyhole panel has an asterisk keyhole.

Abstract: A manhole cover and frame assembly includes an outer frame having a support surface and a side wall that extends upward from the support surface and has a recessed portion. An inner frame is supportable on the support surface. The inner frame has a protrusion extending from the outer peripheral surface. The inner frame also includes an adjustable joint for adjusting the inner frame in its peripheral dimensions to expand to engage the protrusion with the recessed portion, thereby preventing upward movement of the inner frame, and to contract to remove the protrusion from the recessed portion. The inner frame also includes a cover support surface. A manhole cover is supportable on the cover support surface.

Abstract: A method and article for sealing a manhole riser a catch basin, and a pipe juncture. The method is an economical process whereby elastomeric bands are placed around and inside a manhole riser, a catch basin, or a pipe juncture and effectively seals the manhole riser, catch basin, or pipe juncture from loss of water or infiltration of water and other contaminants such as gases and salt.

Abstract: A resilient annular transition collar is provided for roadway structures, including manholes and catch basins, which acts as a flexible transition between the rigid structure or frame of the manhole and the semi-rigid structure of the asphalt paving. The resilient transition collar absorbs any movement of the pavement during expansion and contraction and this absorption avoids the prior art problems of break-up, cracking and separation between manhole and pavement. Risers or adjusting rings may be employed in conjunction with the transition collar to ensure a flush fit between the pavement surface and the upper surface of the transition collar. A mold structure for forming the collars includes heat transfer studs to provide an increased production rate.

Abstract: A drain closure apparatus for closing a storm drain, or other type of drain, in a fluid-tight manner so as to prevent a flow of hazardous materials into the drain. The closure member comprises a first cover member having an outside diameter and a peripheral edge which corresponds to the outside diameter and peripheral edge of an existing drain cover member covering a drain to enable seating and supporting the first cover member in the drain in place of the existing drain cover member, a second cover member in a hole provided therefor in the center of the first cover member, said second cover member having holes in the top thereof so as to permit a flow of fluid through the second cover member and into the drain, a closure member, and a threaded rod for moving the closure member between a first position and a second position as the second cover member is rotated to selectively close the drain in a fluid-tight manner.

Abstract: In order to prevent hazardous substances--oils, fuels, deicing liquids--spilled onto the ground or pavement, e.g. at an airport, to enter storm sewer system with subsequent contamination of the environment, a catchbasin structure is provided comprising a receptacle with an opening closable with a valve in a manner to seal off the entry of the liquid into the storm sewer system. Instead, the liquid can be kept in the receptacle and on the ground in the area adjacent to the catchbasin, or selectively directed to a storage tank system for treatment or recovery.

Abstract: A spacer arrangement is provided for use in raising the height of a manhole cover frame, including one or more base spacer elements and one or more upper side extension elements; said one or more base spacer elements are adapted to be located within said manhole cover frame with said one or more side extension elements extending upwardly relative thereto; the spacer arrangement is adapted to receive a manhole cover; at least an underside surface of said one or more base spacer elements includes downwardly directed projections for stabilizing at least said one or more base spacer elements.

Abstract: A transition collar for use in road construction comprises an annular collar member made of elastomeric materials such as rubber. It has a generally planar top surface and a central opening sized to accommodate a rigid frame structure having an access opening formed therein. The collar member has a vertical outer wall that faces the road material, which outer wall has a number of horizontally extending, spaced apart ridges formed thereon. These ridges assist in securing the collar in a road bed. Preferably the uppermost ridge is spaced below the top surface of the collar. The collar can have a number of small bumps distributed over its top surface to improve traction for vehicles. Preferably these bumps have sloping sidewalls extending about their periphery. A cushioning device is used to adjust the position of the frame structure and comprises a flat, elastomeric member with exterior dimensions corresponding to those of the frame structure.

Abstract: A manhole cover is seated on a flange in a frame from which depends a skirt forming an access opening to a cavity. A cover lifting mechanism external the access opening includes an arm secured to the cover and a tubular cylinder fixed to the skirt, the cylinder including internal aligned journal bushings. A tubular shaft depends from the arm into the journal and axially displaces and rotates about the journal axis. The shaft has an axially extending central bore with a threaded portion. A threaded rod in the central bore rotates about the shaft axis and is captured to a bearing secured to the cylinder lower end. The rod upper end is squared to receive a socket wrench for manually turning the rod with a mechanical advantage which lifts the shaft, the arm and thus the cover out of its seat. Once lifted, the cover is readily rotated away from the access opening by rotating the shaft in the journal while the threads remain engaged.

Abstract: A method and article for sealing a manhole riser, a catch basin, and a pipe juncture. The method is an economical process whereby elastomeric bands are placed around a manhole riser, a catch basin, or a pipe juncture and effectively seals the manhole riser, catch basin, or pipe juncture from loss of water or infiltration of water and other contaminants.

Abstract: A temporary manhole cover constructed of glass fiber reinforced resin grate fits into the standard manhole opening is strong enough to support a motor vehicle and light enough to be lifted out from below or above and also includes a cut out to the edge for pipes, tubing, and wires to be trained through the opening down the manhole.

Abstract: The invention is a monitoring well cover with a generally planar lid, a generally cylindrical rim, and one or more generally cylindrical skirts. The lid has threads on its side to secure the lid to the rim. The rim has an L-shaped upper edge for receiving and sealing tightly with the lid and has snaps positioned around its lower edge for receiving and sealing tightly with one of the skirts. The skirts each having flanges positioned around their upper ends and snaps positioned around their lower ends such that the first of the skirts may seal tightly with the rim and each subsequent skirt may seal tightly with the skirt preceding it. The lid, the rim, and the skirt are all constructed from a fiber reinforced, heat stabilized, high strength thermoplastic.

Abstract: A manhole includes a carriage mounted on the underside of the cover that cooperates with a supporting guide channel located across the mouth of the manhole. the guide channel can be rotated to an incline so that the carriage can easily roll onto and from the supporting guide member. The free end of the guide channel is raised and lowered by a standard ratchet wrench inserted through the cover so that the operator need not lift any part of the cover manually. Once raised to the ready position, the operator simply pulls laterally on the cover handle to roll the cover slightly upward and laterally from the manhole opening. Once the cover clears the manhole, the guide channel can be rotated up and outward to provide access to the entire manhole area , if desired. To replace the cover, the guide channel is rotated to again extend across the manhole, the cover/carriage assembly is rolled laterally on to the guide channel until the cover edge contacts the ring edge.

Abstract: A method and article for sealing a manhole riser and a catch basin. The method is an economical process whereby elastomeric bands are placed around a manhole riser and/or a catch basin and effectively seal the manhole riser and catch basin from infiltration of water and other contaminants.

Abstract: Landings and/or manhole covers formed of a plurality of plate bodies each having a plurality of apertures. Utilizing the plate bodies, a reflecting body having high luminance can be simply and surely provided on the landings and/or manhole covers and it is strong and easily manufactured. The reflecting body comprises a reflecting piece formed by a ceiling having a plurality of concaves and convexes at the rear surfaces thereof and a plurality of legs having windows at the intermediate portions thereof, and a stopper member which is mounted on the aperture of the plate body and has projections, wherein the ceiling is integrated with said plurality of legs and said ceiling and legs respectively made of polycarbonate, polyacrylate or other transparent high polymer substance, and wherein said projections of said stopper member are inserted into said windows of said plurality of legs.

Abstract: A cover assembly for manholes and the like has a hinged cover which is urged closed by gravity and open by an opposing bias force acting between the cover and cover base in such manner as to reduce the force required to open a relatively heavy cover whose weight exceeds the maximum single person lifting weight permitted by OSHA and union regulations to a value equal to or less than such maximum lifting weight. A manually releasable latch prevents uncontrolled closure of the cover by gravity in the event of failure of the bias force.

Abstract: An internal fastening band for an internal manhold chimney seal is disclosed, as well as a means for expanding the band and a means for removing the band. One end of the band is narrower than the other end so that when overlapped the ends of the band nest into one another to form a continuous expansion band. The first end portion has a plurality of apertures longitudinally spaced along the fastening band, and a plurality of slots spaced between the apertures and an end of the fastening band. The second end portion also has a aperture along a tab for engaging one of the slots to connect the first end portion to the second end portion with the particular slot being selected to adjust the continuous circular fastening band to a desired diameter. A tool is described for engaging an aperture in each end portion to increase the diameter of the circular expansion band and force the resilient sleeve against the inside surface of the manhole.

Abstract: A segmented adjustment riser for maintenance holes has a plurality of similar elongated one-piece segments. Each segment has two opposite ends provided with respective interengaging formations, and the segments are placed together end to end to form an endless riser member having planar upper and lower sides. The formations interengage and resist lateral displacement of each end of each segment relative to the adjacent end of each adjacent segment. The segments can be manufactured relatively easily and with greater economy than the corresponding one-piece riser member and facilitate handling and installation.

Abstract: A molded plastic extension member for use in increasing the height of manholes, or catch basins when surfacing or resurfacing a roadway is described. A wedge to adjust the angle of the catch basin support frame or the manhole cover support frame is also described. The extension includes a pocket for reducing the total surface area of the molded plastic member. It also includes a shoulder that interlocks with either the manhole cone, the catch basin cone, or with other stackable molded plastic members. The extension also contains a planer support surface which provides rigidity and support, and provides a surface for caulking to be applied to form a watertight seal.

Abstract: A hand-operated tool for removing and replacing a wide variety of different manhole covers is disclosed. The tool includes a handle which extends upward from slip-resistant feet. A collar with forward extending ears attaches to the lower, central region of the handle. An S-hook is positioned within the ears so that its hook extends downward and frontward, and a clevis is positioned outside the ears. The S-hook, clevis, and ears are all bolted together. One end of a chain attaches to the clevis, and another end of the chain attaches to a link of an elongated link-up unit. The link-up unit's link is dimensioned for snug, but hand-removable, attachment to the S-hook. The snug attachment resists rotation between the link-up unit and the S-hook. A hook pivotably couples to the link-up unit at an opposing end from the link-up unit's link. The hook is coupled so that is can pivot up and down only, and cannot freely rotate around the general direction of elongation of the link-up unit.

Abstract: An opening and closing apparatus for a manhole cover includes a supporting member 2 having a number of elongated holes 1, two hook rods 4, each having a lower hook, and extending vertically through one of the elongated holes 1 of the supporting member 2, and a bracket 5 through which each hook rod 4 extends. A clamp 6 permits adjustment of the vertical position of each hook rod 4. Two horizontal extension members 8 horizontally adjustably connect to opposite ends of the supporting member 2 so that an upper surface of each horizontal extension member 8 wholly or partially overlaps the supporting member 2. A set of bolts 9 and nuts 10 tightly fasten the supporting member 2 to each horizontal extension member 8. A leg 11 projects downward from an inner end of each horizontal extension member 8.

Abstract: A barrel-shaped manhole frame for receiving a manhole cover is provided with an inwardly directed peripheral flange at its lower end having circumferentially spaced inclined grooves to receive wedges that can be driven in situ into surrounding earthwork to wedge the frame upwardly and thereby adjust its height and slope to conform with a roadway or sidewalk surface under construction.

Abstract: An apparatus is provided for installation in a manhole assembly. The mold apparatus is filled with a sealing material to establish a solid bond that blocks inflow of fluids at the joint between abutting components of the manhole assembly. The apparatus includes an open ring, a retaining band for urging the open ring into contact with the manhole so that the open ring defines an annular channel at the joint, and a sealing material dispenser for conveying sealing material into the annular channel. The sealing material hardens in the annular channel to provide the solid bond at the joint between the two manhole components. The manhole components may be an abutting manhole frame and manhole, or two abutting sections of manhole.

Abstract: The lid is made up of a beam assembly and a rim assembly assembled around the beam assembly. The rib assembly is made up of a plurality of channel shaped beams assembled flange to flange. The beams are structurally interlocked to help distribute concentrated loads on the lid surface. Extendable/retractable handles are provided. The top of the lid is coated with slip resistant material. The beams are pultrusions.

Abstract: An in-floor access pit unit for use in a floor having a flooring of a predetermined thickness thereon. The access pit basically comprises a rigid liner, a lower frame, an intermediate frame, a cover assembly, and a height adjusting mechanism. The cover assembly comprises an upper frame in which a cover plate is mounted to provide a recess for receipt of a piece of the same flooring material as on the floor in which the access pit is located. The cover assembly is mounted in the intermediate frame by the height adjusting mechanism. That mechanism comprises plural bolts and nuts for adjusting the height of the intermediate frame and the cover member so that the piece of flooring within the cover assembly is flush with the surrounding flooring. The intermediate frame includes a downwardly depending flange which is disposed closely adjacent a sidewall of the lower frame to prevent the ingress of material therebetween.

Abstract: A subsurface chamber formed by a pit and buried beneath a surface across which aircraft travel is provided with an effective sealing system at its opening. The opening to the chamber is formed by a mounting frame adapted to receive and seat a lid therewithin. The mounting frame is formed with a frustoconical wall tapering downwardly and inwardly toward the opening into the chamber. The lid is provided with a peripheral rim having a plurality of flexible, resilient, annular, water impervious sealing flaps that extend outwardly from the lid an which are vertically spaced from each other. As the lid is lowered into position, the sealing flaps do not scrape or slide against the frustoconical wall of the mounting frame. Rather, they establish contact with the frame only as the lid approaches to within one quarter inch of its fully seated position.

Abstract: A booted road plate includes a plate and an anchoring device appended to the underside of the plate. The plate is sized to cover an excavated repair area to allow vehicular and pedestrian traffic to pass over the excavated repair area without harming the vehicle, pedestrian, or repair area. The anchoring device holds the plate in place over the excavated repair area.

Abstract: In order to prevent the penetration of surface water into a shaft or manhole, the latter is fitted with an insert (5) consisting of a dish-shaped section (9) of impermeable material and the interior space of this dish is connected via connecting ducts (11) with the portion of the shaft or manhole located below the dish (9). The connecting ducts (11) are provided with shut-off devices (12) in the form of spherical floats which act in conjunction with a valve seat (13) to seal off the connecting ducts (11) when the level of liquid in the dish rises (FIG. 1).

Abstract: An Aqua-Blok that fits into a frame or cone of a manhole directly beneath the cover, in the frame below the cover or within the cone to catch water that seeps into the manhole. Aqua-Blok is a polyurea, flexible bowl that rests on the frame directly under the cover or is mounted in frame or the cone. When used in the lower frame, it has a closed cell gasket on its outer top side, and an adjustable stainless steel ring on its inner circumference to press it against the frame. When Aqua-Blok is placed in the cone, it uses a rubber mount placed within the cone to mount Aqua-Blok. The rubber mount has a core with concentric rubber rings on its outer periphery that match the sloped sides of the cone. It has a circular cavity in its inner circumference to receive the pressure ring. The pressure ring forces the core and the concentric rings against the wall of the cone in a watertight fit. The bowl is seated on the mount where it catches any water that flows into the manhole from above it.

Abstract: The improved manhole cover of this invention provides a strong yet lightweight access cover structure made from a series of radially staggered ply layers bonded above and below a homogenous frusto-conical core portion with resin, each ply layer made from an array of radially staggered unidirectional fiber tape.

Abstract: A manhole cover apparatus including a collar defining an opening with an inner perimeter is provided with a pivotally mounted cover having an outer perimeter greater than the inner perimeter of the collar. A seal is provided to seal between the cover and the collar. Closure structure is provided to secure the free end of the cover to the collar. A threaded bolt is provided to close the cover. A pivotally mounted lever arm is mounted to the bolt for turning of the bolt. An adjustable threaded hinge is provided to adjust the cover in a longitudinal direction relative to the collar. The manhole cover apparatus is useable on pressure containers, such as those used to pneumatically handle particulate material.

Abstract: A manhole cover comprises a base and a cover. The base has a first inner rim provided with a first bevel while the cover has a second outer rim provided with a second bevel. When the base is joined with the cover, the first bevel of the base and the second bevel of the cover are caused to make contact with each other such that the base is joined with the cover in an airtight and watertight manner. The first bevel of the base and the second bevel of the cover are of such construction that they enable the cover to be lifted easily to set apart from the base.

Abstract: An adjustable manhole cover support frame that includes a base unit, a top support unit telescopically arranged on the base unit and screw jacks interconnecting the two units permitting selectively adjusting the relative telescopic position of the top unit on the base unit. The base unit has an open ended sleeve projecting upwardly from a flange utilized to secure the base unit to the top end of a manhole vertical conduit. The top support unit has a top annular plate from which depends three cylindrical walls defining a first outer cavity telescopically receiving the sleeve of the base unit and inwardly therefrom a second cavity with holes in the bottom to receive the upper ends of threaded bolts that provide the screw jacks for adjustment.

Abstract: The invention concerns a manhole cover with a frame (1) and a grating (3) or cover fitting flush with the frame (1). In order to secure the cover (3) in such a way that it can be easily removed and put back in place, a one-piece securing element (4a) is attached to the frame (1), the securing element (4a) having a locking element (7) at the end of a tab-like retaining element (6) extending obliquely upwards. The locking element (7) engages against a locking surface (9) at the bottom of a recess (8) in the surface of the grating (3) or cover. To unlock the manhole cover, the locking element (7) can be pulled away from the locking surface (9) with a special tool, e.g. a pair of pliers, the retaining element (6) being bent elastically. The securing element (4a) is mounted on the frame (1), embracing shoulders (5a, 5b) so that it is secured by a snap-in connection. The securing element can also be attached to the cover or grating and engage against a locking surface on the frame.

Abstract: A locking manhole insert to be placed under a conventional manhole cover to prevent unauthorized access to the manhole. The insert includes a plate-shaped disc with a plurality of locking radial arms mounted to its undersurface. The locking radial arms are securable in the extended position using a conventional padlock. The insert further includes apparatus for suspending equipment, such as pollution monitoring units, within the manhole opening.

Abstract: A manhole casting setting fixture includes a pair of spaced parallel frame rails connected by a plurality of transverse struts. Four loop handles are secured at opposite ends of the frame rails to facilitate manual manipulation and transportation of the fixture. A pair of clamp mounting blocks are positioned in juxtaposed relation centrally on bottom surfaces of the frame rails. A pair of lead screws extend through respective threaded coaxial bores in the mounting blocks and include handle portions to facilitate manual loosening and tightening of the lead screws. A pair of arcuate clamping jaws are rotatably mounted on oppositely directed end portions of the lead screws.

Abstract: An anchor for securing a manhole cover support to a manhole frame is shown. Dovetail-shaped receptacles are formed at a plurality of locations about the manhole cover support. A plurality of anchor straps having a cooperating dovetail shape are inserted into the receptacles. A lower end of each anchor strap has a threaded bolt extending upward. The anchor straps are simply dropped into the receptacles and the lower bolt is rotated to wedge the dovetail shapes tightly together and, at the same time, secure the manhole cover support against the frame.

Abstract: A lockable cover for a ground opening such as a manhole or catch basin. The cover has a lock including a reciprocating locking bolt mounted to its underside for engagement of a lip of a surrounding support. The bolt is accessible directly from above the cover through an aperture in the cover. In one disclosed embodiment, a cover is secured to its support by a pin which extends from the cover to under a lip of the support and a lock. In another embodiment, a catch basin cover is secured to its support through a hinge connection and a lock. In another embodiment, a manhole cover is secured to its support through a pair of locks.

Abstract: A manhole frame having a top with an opening therein defining a cover seat area, a side wall extending downward from the top to an inwardly extending lower flange, the exterior of the side wall being outwardly extending at its top and inwardly extending at its lower portion down to an inwardly extending lower flange. Also disclosed is a method of installing and raising the manhole frame to a new level.

Abstract: A manhole cover support cooperable with a manhole frame for raising the elevation of a manhole cover utilizes a gapped support body positionable between the frame and the manhole cover and size-adjustment mechanisms for altering the size of the outer periphery of the support body. The support body includes one section disposed on one side of its gap and another section disposed on the opposite side of its gap, and the size-adjustment mechanisms include a threaded shank attached to the one section of the support body so as to extend across the gap provided therein. The size-adjustment mechanisms also include a U-shaped bracket attached to the another section of the support body so that the portion of the threaded shank which extends across the gap is accepted by the U of the U-shaped bracket and further includes a nut threaded upon the shank so as to be disposed between the attached end of the shank and the bracket.

Abstract: An access cover assembly (10) has a cover member (12) and a frame member (14). The cover member has twelve vertical wall sections (36) with adjoining vertical edges (38) and twelve canted surfaces (40) with adjoining angled edges (46) depending downwardly from said vertical wall sections (36). The frame member has an upwardly facing frusto-conical section (80) and a number of substantially vertical edges (82) depending downwardly from an inner periphery (81) of said section (80), said inner periphery (81) being shaped such that when said angled edges (46) engage said inner periphery (81) when the cover is partially seated in the frame, the cover rotates towards a fully seated position in the frame member (14), whereupon the cover falls into and is locked within the frame member.

Abstract: A protective ramp for placement around a temporarily elevated underground utility access hole support. The ramp includes a ramp member having a top surface and an obverse bottom surface, and an opening, usually centrally disposed, of a size to be placed in closely surrounding position around a predetermined size access hole support. The ramp member also has a thickness defining the opening approximating the height of the elevated access hole support over which the ramp is to be placed and a progressively diminishing thickness from the opening to the outer edge wherein the ratio of the thickness of the ramp member at the opening to the distance from the opening to the outer edge is no less than one to five.

Abstract: The present invention is directed to a gripping system for holding a supporting ring member adapted to support a manhole cover in a tubular member having a peripheral horizontal shoulder. The gripping system has a plurality of rigid elbow-shaped members internally secured inside the ring member. The elbow-shaped members have a horizontal arm radially extending inside the ring member and a substantially vertical pending arm extending below the ring member and adapted to internally face the tubular member. A screw member is threadedly mounted through the vertical arm in the direction of the tubular member. The screw member is provided with a friction plate fixed at one end between the vertical arm and the tubular member for tightening the friction plate on the tubular member and for frictionally retaining the ring member to the tubular member. The friction force is adapted to vertically fix the ring member relative to the tubular member.

Abstract: A watertight chimney assembly prevents infiltration of water in the region between a manhole cover support frame and a concrete manhole assembly. The watertight chimney, in one embodiment, is comprised of a pair of tubular telescoping sleeves each provided with a flange for mounting respectively to and between the top lip of a manhole assembly and the bottom surface of a flange on the cover support frame supported a desired distance above the top of the manhole assembly to maintain the cover frame at proper grade. An O-ring seated within an annular groove provided in one of the tubular sleeves provides a sliding watertight seal therebetween. The sleeve flanges are arranged and compressed between the cover support frame and manhole assembly and contribute to the watertight seal. One of the sleeves is reversible to increase the telescoping range between a minimum and a maximum extension. In an alternative embodiment, the internal surface of the manhole opening constitutes one of the telescoping members.

Abstract: Contamination of the sampling portion of an observation well is avoided while providing axial float between the observation well cover and observation well liner by this observation well cover. The observation well cover includes a manhole ring that is set in a raised area of concrete. A manhole cover is fit on the ring and a liner cover fits underneath the ring. The liner cover has a trap to collect contamination. The walls of the screen cover slidingly mate with a wall and, of an 8-inch to 12-inch observation well liner and, respectively. The inner wall of the trap access hole slidingly mates with the outer wall of a 2-inch or a 4-inch observation well liner. This observation well cover provides axial float of the liner relative to the observation well cover while maintaining sealing integrity.

Abstract: A quick opening manhole cover assembly is provided which is suitable for use with virtually any shape manhole cover of a pressure vessel. The assembly broadly includes a manhole cover having outer dimensions which are less than the inner dimensions of the manhole so that the cover can pass freely therethrough. The assembly also includes a structure for raising and lowering the cover into and out of the manhole. A sliding lock mechanism is located above the cover and is engageable to prevent axial movement of the cover. A safety mechanism is provided to prevent the lock from disengaging when the vessel is under pressure. Once the lock is engaged, the cover is raised and a seal carried atop the cover provides a fluid tight sealing engagement of the cover. The pressure within the vessel urges the cover further upward to further ensure the integrity of the seal.

Abstract: When a PVC sewer pipe is to be connected to a precast reinforced concrete manhole at a designated hole location thereof, this designated hole is made large enough to later accommodate grout and an inserted end of the PVC sewer pipe, on which an ABS manhole adapter is pre-positioned. This ABS manhole adapter serves as a coupling-collar, around which the grout is placed, as the grout is used to fill the remaining volume of the designated hole, thereby completing the resilient connector assembly used in making this connection between the precast reinforced concrete manhole and the PVC sewer pipe.

Abstract: A ground engaging hollow, disklike support mounted coaxially about the top end of the upper section of an underground valve box and having a conical top wall which sheds water to the outer edge of the disk to prevent softening and erosion of ground under the disklike support leading to vertical destabilization of the valve box.

Abstract: This invention provides an apparatus for containing and terminating fuel leaks at a dispenser pump island. The dispenser containment system of the subject invention comprises a substantially rectangular fiberglass box-like structure, having a lower trough portion and an upper hood portion. The lower trough portion of the dispenser containment system is provided with a plurality of integral fiberglass couplings for interconnecting containment hose with the dispenser pump, an integral fiberglass conduit entry penetration for enabling conductive wires to extend through the dispenser containment system and into the fuel dispenser pump and an integral fiberglass vapor recovery port for removing stage II vapor from the dispenser pump.

Abstract: An external manhole sealing assembly for sealing the joint to a manhole frame and a manhole casing which includes a resilient sleeve mounted on the manhole frame and the manhole casing to span the joint between the frame and casing, the sleeve is secured to a flexible ring which is mounted on the flange of the manhole frame and a second band encircling the sleeve on the manhole casing, the manhole frame being raised above the manhole casing a predetermined distance prior to sealing the sleeve to the manhole casing so that a bulge is created in the sleeve when the manhole frame is seated on the manhole casing, the bulge allowing for heaving of the manhole frame without destroying the joint seal.