Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1985-09-23
1987-12-08
Shoap, Allan N.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 9, 277101, 277138, 277146, 277207A, 277212FB, 285 18, 285 39, 285230, 285236, B23P 1900, F16J 1510, F16L 502, F16L 2108
Patent
active
047114550
ABSTRACT:
A resilient gasket having an outer flange positioned within a manhole opening and held by a compression band. The gasket has a central opening with an enlarged beaded periphery to encircle a pipe. A tapered intermediate section is joined to the outer flange and the beaded periphery. The intermediate section folds after insertion and clamping in an opening to form diagonally aligned annular portions defining a V-shaped yieldable gasket to maintain a watertight seal between opening and pipe, even when misaligned. A strap encircling the gasket next to the beaded periphery enhances the watertight seal between gasket and pipe. The clamping band has free ends which cooperate with projections of a piston cylinder assembly. The clamping band is formed of material impervious to the surrounding environment. The expansion assembly includes the aforementioned piston cylinder assembly which cooperates with an hydraulic jack and is positioned with its projections against the free ends of the clamping band to expand the clamping band into a locked position against the gasket flange and to apply a force directly upon the clamping band to insure proper positioning and locking of the clamping band. The hydraulic jack may also include a swingable member having a free end which moves along a curved path to follow the movement of the clamping band as it expands. The initial configuration of the gasket expedites the insertion, expansion and locking of the clamping band. A cooperating groove receives a projection, said groove and projection being adjacent at oppostie ends of the clamping band to prevent relative axial movement of the clamping band ends as it is expanded.
REFERENCES:
patent: 1211692 (1917-01-01), Endebrock
patent: 1274038 (1918-07-01), Hilker
patent: 3293978 (1966-12-01), Handley
patent: 3808937 (1974-05-01), Roehrig
patent: 3958313 (1976-05-01), Rossborough
patent: 4103901 (1978-08-01), Ditcher
patent: 4387900 (1983-06-01), Ditcher et al.
patent: 4478437 (1984-10-01), Skinner
Ditcher Jack
Westhoff James A.
A-Lok Products, Inc.
Shoap Allan N.
Weinstein Louis
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