Rapidly adjustable man-hole cover seat

Details Rapidly adjustable man-hole cover seat Rapidly adjustable man-hole cover seat

1998-08-25

1999-08-24

Redman, Jerry

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

With additional enclosure structure; e.g., manhole

404 26, E02D 2914

Patent

active

059410256

ABSTRACT:
A rapidly adjustable man-hole cover seat for sustaining the alignment of a road surface and a man-hole cover, comprises a base, an adjustable seat, a man-hole cover and a cruciform hole fixing frame, a stud block, a supporting block, etc. In a large distance adjustment, the inner rim of the adjustable seat is designed so that it may be penetrated by adjustable screws. Thus the adjustable seat may be adjusted and moved for aligning with the road surface. In another small distance adjustment, a cruciform hole fixing frames are installed on the bottom of the adjustable seat for being penetrated by screws so as to be installed on the base. Further, supporting blocks are installed for distributing the weight borne by the adjustable seat, the stud block and screws so that the man-hole cover may suffer a heavy pressure and the steadiness of the man-hole cover and road surface as cars are passing is sustain.

REFERENCES:
patent: 3858998 (1975-01-01), Larsson et al.
patent: 4582450 (1986-04-01), Neil
patent: 4719724 (1988-01-01), Ditcher
patent: 5344253 (1994-09-01), Sacchetti
patent: 5697729 (1997-12-01), Bowman

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