Transition collar

Details Transition collar Transition collar

1994-12-09

1997-01-21

Taylor, Dennis L.

Road structure, process, or apparatus

Pavement

Vault cover-closure

404 26, 52 20, 52 21, E02D 2914

Patent

active

055954553

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.

REFERENCES:
patent: 3263580 (1966-08-01), MacMillan
patent: 4158515 (1979-06-01), Helms
patent: 4759656 (1988-07-01), Wilson
patent: 4808025 (1989-02-01), McGinnis
patent: 4925336 (1990-05-01), Simmonds
patent: 4927290 (1990-05-01), Bowman
patent: 4969771 (1990-11-01), Bowman
patent: 5030030 (1991-07-01), Simmonds
patent: 5044818 (1991-09-01), Pritchard
patent: 5362175 (1994-11-01), Bectin

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