Pipe joints or couplings – Essential catch – With manipulator
Reexamination Certificate
2006-01-17
2006-01-17
Bochna, David (Department: 3679)
Pipe joints or couplings
Essential catch
With manipulator
C285S317000, C285S323000
Reexamination Certificate
active
06986533
ABSTRACT:
A pipe coupling, which enables pipes to be assembled with the pipe coupling by an one-touch operation while maintaining the liquid-tightness at jointing portions. In the pipe coupling, a connection tube has holding shoulders formed at opposite predetermined inner portions of the connection tube and maximum diameter portions formed at both side portions of the connection tube outside of the holding shoulders. The connection tube has an inner diameter decreasing in a direction toward both mouths of the connection tube from the maximum diameter portions. Snap rings are inserted inside of the mouths of the connection tube in a compressed state. Packing members are tightly disposed in each of the maximum diameter portions. Jaw couplings are inserted in the mouths of the connection tube and each of the jaw couplings are assembled with a plurality of fixing jaws and having engaging protuberances. The fixing jaws are arranged in a circumferential direction of each of the jaw couplings. Each of the engaging protuberances has a width smaller than an interval of a spaced portion of each of the snap rings. The engaging protuberances are engaged with inner ends of the snap ring. Elastic members are inserted between the jaw couplings and the packing members.
REFERENCES:
patent: 2138913 (1938-12-01), Fotsch
patent: 2702202 (1955-02-01), Kaiser
patent: 0427306 (1991-05-01), None
Patent Abstracts of Japan Publication No. 06-249381, entitled Pipe Coupling and Locking Device Therefor, By Hitoshi et al., published Sep. 6, 1994.
Bachman & LaPointe P.C.
Bochna David
Join Top Co., Ltd.
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