Manhole cover

Details Manhole cover Manhole cover

2006-09-12

2006-09-12

Addie, Raymond W. (Department: 3671)

Road structure, process, or apparatus

Pavement

Vault cover-closure

C052S019000, C220S844000, C220S848000

Reexamination Certificate

active

07104722

ABSTRACT:
A manhole cover includes a cylindrical manhole including manhole lugs, wherein the manhole lugs extend around the upper outer periphery of the manhole; the cover includes cover lugs, the cover lugs extend around the outer periphery of the cover. The cover co-operatively mates with and closes off the manhole. A strap also extends around the cover and manhole lugs such that applying tension to the strap assembly forceably urges together the cover and manhole lugs wherein the strap for clamping together the manhole lugs to the cover lugs thereby placing cover into a sealed position.

REFERENCES:
patent: 3209938 (1965-10-01), De Frees
patent: 5193864 (1993-03-01), Coleman
patent: 5715965 (1998-02-01), Goulding
patent: 6066237 (2000-05-01), Kindersley
patent: 6199414 (2001-03-01), Chang

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