Pipe joints or couplings – Essential catch – Resilient ring
Patent
1977-12-29
1980-01-15
Arola, Dave W.
Pipe joints or couplings
Essential catch
Resilient ring
285342, 285348, 285369, 285374, 285376, 285404, F16L 3900
Patent
active
041835611
ABSTRACT:
The open end inner periphery of a socket is provided with an annular groove, and at a suitable sufficient distance from the annular groove axially toward the innermost side of the socket a seal member stopping projection extends from the inner surface of the socket toward the outer peripheral surface of a spigot. A split lock ring is fitted in the annular groove. The outer peripheral surface of the spigot is provided with a projection which is disposed between the split lock ring and the stop projection and which is axially movable therebetween along with the spigot and adapted to engage with them at the ends of its travel. A seal member is disposed between a seal member supporting surface disposed inwardly of the stop projection and the outer peripheral surface of the spigot. This seal member is urged toward the stop projection by an urging device. A member for preventing the radial expansion of the lock ring is interposed between the bottom of the annular groove and the outer peripheral surface of the lock ring. This member comprises a flexible tube and a filler injected into the tube. The filler is initially fluid and afterwards solidifies.
REFERENCES:
patent: 1439452 (1922-12-01), Shaw
patent: 2099722 (1937-11-01), Byers
patent: 2922664 (1960-01-01), Risley et al.
patent: 3338596 (1967-08-01), Knox
patent: 3432175 (1969-03-01), Kawai
patent: 3530685 (1970-09-01), Ehret
patent: 3941410 (1976-03-01), Miyaoka
patent: 3944263 (1976-03-01), Arnold
patent: 3995889 (1976-12-01), Carr
Miyamoto Hiroshi
Nakajima Toshi
Sagara Takao
Yamaji Tadao
Arola Dave W.
Farley Joseph W.
Kubota Ltd.
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