Dual function gasket with dual lips and optional locking ring

Details Dual function gasket with dual lips and optional locking ring Dual function gasket with dual lips and optional locking ring

1984-10-09

1986-07-29

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277166, 277206R, 285111, 285113, 285232, 285345, 285379, F16J 1512, F16L 1702

Patent

active

046027920

ABSTRACT:
A dual function gasket adapted for insertion into a suitable groove formed in the bell of an associated pipe includes an annular gasket body made of a resilient material. The body terminates radially inwardly in a leading lip and a pressure activated sealing lip spaced rearwardly therefrom. An annular groove is provided in the gasket body and an annular locking ring may be selectively inserted into the groove. The ring is made of a material harder than the gasket body and is inserted into the groove when a high pressure seal is desired. The ring may be removed when only a low pressure seal is desired.

REFERENCES:
patent: 1683076 (1928-09-01), Johnson et al.
patent: 2980449 (1961-04-01), Dunton
patent: 3203511 (1965-08-01), Long
patent: 4034994 (1977-07-01), Ohta et al.
patent: 4143884 (1979-03-01), Nicholas et al.
patent: 4216981 (1980-08-01), Jensen
patent: 4230157 (1980-10-01), Larsen et al.
patent: 4343480 (1982-08-01), Vassallo
patent: 4379559 (1983-04-01), Bohman

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