Manhole cover gasket seal

Details Manhole cover gasket seal Manhole cover gasket seal

1982-11-24

1984-04-03

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277DIG2, F16J 1510

Patent

active

044404077

ABSTRACT:
A manhole cover gasket seal to seal a manhole cover in the opening of a manhole frame, the seal including a flat circular ring, an annular flange secured to the inner diameter of the ring and having a diameter substantially equal to the diameter in the opening of the manhole frame and a bead formed around the top of the ring and projecting slightly above the ring, the ring, flange and bead being formed as an integral unit of a resilient elastomeric material.

REFERENCES:
patent: 696183 (1902-03-01), McAuliffe
patent: 3147014 (1964-09-01), Ohnstad
patent: 3199879 (1965-08-01), Fleming
patent: 3355057 (1967-11-01), MacKenzie et al.
patent: 3406409 (1968-10-01), Burns
patent: 3979130 (1976-09-01), Cowie

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