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6887012 |
Cover apparatus for an access pipe opening
Cover apparatus for temporarily covering access openings for water, drain, manhole and overflow pipes when the access openings are exposed, such as during construction, to prevent dirt, dust or...
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6866442 |
Aircraft service pit T-handle latch
A latch assembly is provided for an aircraft service pit having a lid frame formed with an access opening encompassed within an upwardly facing bearing ledge. The pit lid has a flat upper surface...
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6866444 |
Device installed at a ditch on a road, to prevent back flow of sewage and malodor
A device installed at a ditch on a road for preventing a backflow of sewage and a malodor is provided. The device includes a frame portion comprising a plurality of frames arranged in parallel with...
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6854922 |
Locking cover for a soffit manhole
A locking cover is provided for a manhole or other access opening formed in a soffit or the like, such as an access manhole formed in an otherwise enclosed overhead cell or chamber within a...
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6851225 |
Device for equalizing changes in level between a ground area surface and a frame for a manhole cover, and a method for mounting the device
A device for equalizing changes in level between a ground area surface extending over a ground structure and a frame for closure of an installation projecting into a ground structure therebelow,...
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6799921 |
Manhole cover/frame exchange method
The present invention provides a manhole cover/frame exchange method capable of minimizing the size of a portion to be mended, of eliminating a pressing step by a roller machine, of...
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6773202 |
Device for covering shafts
A device for covering shafts of manholes in roads, ( 3 ) which is slideably guided in a covering ring ( 2 ) that is rigidly fixed on the shaft ( 1 ) proper, and a retaining ring ( 4 ) for receiving...
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6769834 |
Methods and apparatus for covering openings in roadways
A mat is disposed on top of an access cover to compensate for a vertical offset between the top of the cover and the top of the roadway surrounding the cover. Fasteners are inserted through aligned...
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6763967 |
Valve box locking lid and method therefor
A locking lid and method for a valve box. The locking lid has a closure and surrounding external seal, which fit into the valve box opening and close/seal it. The locking mechanism of the locking...
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6752565 |
Manhole cover system
A cover system in use with a pavement slab, a communicating and downwardly extending manhole tube extending from the slab. The system includes a substantially annular shaped and three dimensional...
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6749363 |
Aircraft service pit lid hinge
A pit lid assembly is formed for a subsurface aircraft servicing pit and includes a lid frame formed with a flat, upper deck, a pit access opening surrounded by the deck, and a hinge pocket defined...
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6743088 |
Apparatus and method for minimizing liquid infiltration into subterranean openings
Assemblies and methods are provided to divert liquids that would otherwise infiltrate utility manholes or other hatchways, while allowing gases to vent to the atmosphere. Preferred embodiments of...
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6739796 |
High security manhole insert cover
The security manhole insert cover relates to a locking manhole insert to prevent ingress or egress to a manhole from above or below the manhole to prevent access to underground utilities, tunnels...
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6722813 |
Road network device with articulated cover
A rigid anti-theft cover ( 3 ), for covering of shafts leading to underground mains-water systems, hingedly mounted on a frame ( 1 ) with two side edges ( 32 A, 32 B) bearing two projecting parts...
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6709064 |
Method and device for detaching or cutting out an embedded manhole frame
A method for detaching a manhole frame ( 7 ) that is embedded in a road surface, wherein the manhole frame ( 7 ) is cut horizontally starting from the inside, without significant exposure of the...
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6692183 |
Hydraulically adjustable manhole ring
A hydraulically adjustable manhole ring including upper and lower rings formed to provide a channel there between. The channel is sealed by in inner flexible membrane coupled between the inner...
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6688806 |
Jump-proof manhole-handhole
A manhole/handhole includes a cover and a frame base. A plurality of elastic fixtures are bonded below through holes of the frame base. The through holes are corresponding to fixing holes of the...
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6688807 |
Sealing device for a manhole
A sealing device that ensures the hermetic securing of the lid ( 5 ) in the access mouth ( 2 ) in order to prevent any infiltration of fluids from the outside or escape of gases from the interior. ...
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6682257 |
Cover apparatus for an access opening
A cover apparatus for temporarily covering access openings for water, drain, manhole and overflow pipes during construction, when the access openings are exposed, to prevent dirt, dust or...
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6679651 |
Method of converting existing negative pressure tank access ways
Method of replacing a blind flange manhole cover of the type including a bolted on blind flange mounted on a bolting flange of a negative pressure storage tank manway with a manhole cover having a...
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6676332 |
Highway device and covering element for such a device
This highway device includes a frame and an element ( 14 ) for covering the frame, the frame ( 12 ) including a peripheral border with two walls delimiting a groove and the covering element being...
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6616371 |
Cover for in-ground meter enclosures used in traffic loading conditions, and method for making
A cover for in-ground meter enclosures used in traffic loading conditions employs a relatively thin plate member formed of a ductile iron alloy and is dimensioned to extend laterally across a top...
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6616370 |
Panel inspection plug and method for assembling and using same
Method and assembly for inspecting the contents of a connection box or a utility system such as a sewer, telephone electrical, gas etc. via an inspection plug. The inspection plug provides an...
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6595717 |
Road gully or inspection cover assembly
A road gully or inspection cover assembly comprises an outer frame having an upstanding outer wall and integrally formed support structure extending inwardly of the lower regions of the outer wall...
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6588810 |
Closing device with selective locking
A closing device with selective locking for closing a frame includes a roughly flat lid selectively applied to the frame, a lock connected with the lid, and a key which has a socket and an arm, one...
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6584734 |
Locking ground hole cover
A locking ground hole cover is disclosed comprising a cover plate with a scissor-type apparatus suspended therefrom which apparatus can be actuated from above the cover plate. The apparatus allows...
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6550294 |
Manhole security device
The present invention 10 discloses a disk-like member 15 that would be placed on the cover-retaining flange 20 in the manhole tube 22 on which the cover 16 would ordinarily rest. The...
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6551015 |
Method of and system for venting out buildup of explosive gases in a manhole
A method of and system used for venting out buildup of explosive gases in a manhole caused by an explosion and including a support frame, a two inch thick plate member positioned on top of the...
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6536987 |
Quick manhole/handhole construction method and related devices
A quick manhole/handhole construction method and related devices is provided that includes a cutting unit and a manhole/handhole cover lifter. The cutting unit includes a radial feeding device, a...
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6514008 |
Device for sealing manhole covers to chimneys
A kit for connecting and sealing a manhole cover frame to the upper surface of a chimney and a method of using the kit. The kit contains a spacer which may be cut to the proper length and to make...
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6488440 |
Hole cover device and method for covering a hole
A hole cover device is used to cover all or a portion of an excavation or hole. The hole cover device includes a top plate through which extends a screw mechanism that is coupled to a plurality of...
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6484451 |
Stackable riser resistant to soil movement
A stackable riser having a substantially smooth outer surface has a first open end defined by an edge and a second open end defined by a pair of adjacent channels, so that the edge defining the...
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6449908 |
Gate valve box sealing
A gate valve box adaptor structure, the present invention provides a permanent support for the key box bonnet that is unaffected by the surrounding environment. The adaptor is supported on the gate...
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6446307 |
Manway lid lifter
A lid lifter mount is installed on the hinge pin of a conventional manway lid, and has a compression spring assembly engaging a lever which is also installed on the hinge pin. The lever has a bar...
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6435763 |
KEY HOLE INSERTION FOR MANHOLE AND MANHOLE COVER LOCKING APPARATUS EQUIPPED WITH THE KEY HOLE INSERTION AND MANHOLE COVER LOCKING SYSTEM AND UNLOCKING METHOD AND MANHOLE COVER OPENING AND CLOSING CONTROL SYSTEM
The present invention is provided with a key hole insertion fitted to a manhole cover, a manhole cover locking apparatus equipped with the key hole insertion, a manhole cover locking system, a...
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6422784 |
Plate support device for use during road repairs
A plate support device for use during road repairs for creating a smooth transition from the road to the plate member. The plate support device for use during road repairs includes a support member...
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6406218 |
Low-flow-contaminant-adsorbing system
A structure for use with low flow stormwater drainage includes a two-piece outer cylindrical housing and a removable inner cylindrical flow cartridge containing a replaceable filter media. The...
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6393771 |
Cover for closing surface disposed utility access opening
A cover for closing a utility access opening disposed in a fabricated surface having a defined external appearance. The cover includes a cap member engageable within the opening and having a...
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6385913 |
Steel manhole
A steel manhole is provided which includes a steel box having a hole having a bolt hole and formed at an upper portion of the same, a height control pipe having a vertical longitudinal hole...
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6371688 |
Manhole cover mounting structure
A manhole cover mounting structure includes an outer frame fastened to a manhole box by screw bolts, the outer frame having an upright guide rod in each of a plurality of hollow peripheral locating...
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6350081 |
Manhole restraining system for venting out explosive gases in a manhole
A manhole restraining system used for venting out explosive gases in a manhole caused by an explosion. The manhole restraining system comprises a support frame, a two inch thick plate member...
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6309139 |
Manhole with extension wings
A manhole for a storm sewage system comprising a structure having at least two outwardly extending substantially vertical flat panels projecting outwardly from the exterior surface a predetermined...
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6231267 |
Threaded plug device for attachment to a trench plate for removable attachment of a hoist ring
A pair of high-quality material threaded nuts are secured to a trench plate for subsequent placement of a hoist ring thereto.
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6227758 |
Protector for through-the-curb drain
A protector for a drainpipe exit passing through a sidewalk curb is provided with an angled front face with an exit drain opening formed therein. The angled front face is secured to a top plate, a...
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6226929 |
Liquid infiltration prevention structures for preventing liquid infiltration manhole assemblies gate value sealing structures for preventing settling or shifting of key box bonnets and method for using said structures
A gate valve box adaptor structure, the present invention provides a permanent support for the key box bonnet that is unaffected by the surrounding environment. The adaptor is supported on the gate...
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6206609 |
Extension for a canal bed liner
An extension collar suitable for engagement with an upper ledge of an invert liner positioned within the canal bed of the base of a manhole or catch basin structure. The extension collar is...
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6180203 |
Rotational moulding process
A method for rotational molding of articles, including the step of rotationally molding a mixture of particulate plastics material comprising at least one thermoplastics material having a first...
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6161985 |
Manhole collar assembly
Embodiments of apparatus and a method of raising a manhole ring during construction or repair of roads are shown and described. The apparatus and method include formation of a manhole collar by use...
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6161984 |
Manhole or catch basin assembly
A manhole or catch basin assembly comprises separable component parts which assemble to a unitary structure, the component parts being readily replaced or interchanged to increase the vertical...
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6143394 |
Nonwoven sorbent manhole apron
There is disclosed the manufacture and use of nonwoven absorbent mats laminated with barrier film for manhole aprons. The absorbent aprons are used about manholes during routine maintenance of...
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