초록 ▼

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

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. This cushioning device preferably has shallow indentations on one of its two major surfaces.

대표청구항 ▼

An enclosure for placement in or beneath a road bed comprising: a rigid hollow structure having sidewall and a vertical passageway formed therein, said structure being adapted for burial in the ground; a metal frame structure mounted on top of said hollow structure and forming an access opening for

An enclosure for placement in or beneath a road bed comprising: a rigid hollow structure having sidewall and a vertical passageway formed therein, said structure being adapted for burial in the ground; a metal frame structure mounted on top of said hollow structure and forming an access opening for entry into said hollow structure; a cover mounted in said metal frame structure and removably covering said access opening; a cushioning device positioned between said frame structure and said hollow structure and comprising a resilient, elastomeric member which is generally flat in a horizontal plane and has exterior dimensions generally corresponding with exterior dimensions of said frame structure, said cushioning device has a hole aligned with said access opening and of similar size, said cushioning device having two major surfaces, at least one of which has a plurality of shallow indentations for texturing the major surface for receiving an adhesive; an adhesive for retaining said cushioning device between said frame structure and hollow structure: and a transition collar made of an elastomeric material mounted around said metal frame structure, said transition collar having a generally planar top surface and a relatively large opening sized to accommodate said rigid frame, said collar having an outer wall having a plurality of horizontally extending, spaced apart ridges, wherein said ridges assist in security said collar in a road bed.