Pipe joints or couplings – Essential catch – Resilient ring
Patent
1994-07-29
1995-12-05
Arola, Dave W.
Pipe joints or couplings
Essential catch
Resilient ring
285 38, 2853345, 285354, 285369, 285423, F16L 3900
Patent
active
054722446
ABSTRACT:
A plastic coupling for plastic tubing having a groove annulus formed between a first circumferential groove on the outer periphery of the enlarged diameter portion of a connection tube and a second circumferential groove on the inner periphery of a cap nut 5 when the cap nut 5 is mounted on a joint body, and an enlargeable split ring having an internal diameter smaller than the external diameter of the enlarged diameter portion and loosely fitted into the second groove, the split ring being adapted to slide on the enlarged diameter portion to the first groove until the split ring falls within the first groove and is located within the groove annulus when the cap nut is mounted on the joint body.
REFERENCES:
patent: 2289382 (1942-07-01), Parker
patent: 2515219 (1950-07-01), Harding
patent: 2517706 (1950-08-01), Paquin
patent: 2549741 (1951-04-01), Young
patent: 3334773 (1967-08-01), Bimba
patent: 4681352 (1987-07-01), Sundholm
patent: 4750765 (1988-06-01), Cassidy et al.
patent: 5074599 (1991-12-01), Wirbel et al.
patent: 5131145 (1992-07-01), Badoureaux
patent: 5332271 (1994-07-01), Grant et al.
Japan Publication 6-71749 is believed to have been published on 15 Mar., 1994 and is not admitted to be prior art. An English translation was filed as U.S. Appln. S.N. 917,460, filed Jul. 21, 1992, now abandoned, a copy of which is attached.
Maeba Hidenori
Nakazawa Takao
Nishikata Yasukatsu
Arola Dave W.
Fluoroware, Inc.
Nisso Engineering Co., LTD
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