Pipe joints or couplings – With fluid pressure seal – With separate – encased pipe-gripping means
Patent
1974-10-10
1976-02-17
Kundrat, Andrew V.
Pipe joints or couplings
With fluid pressure seal
With separate, encased pipe-gripping means
285261, F16L 2704
Patent
active
039388336
ABSTRACT:
A universal joint construction connecting the ends of two pipes is formed by a pair of articulation rings, each fitted over the end portion of one of the pipes and attached thereto. A spherical convex outer surface on each articulation ring is engaged in opposite axial directions by a pair of concave inner surfaces - one on a joint or coupling pipe, and the other on a separation preventive ring attached to the joint pipe. A sealing member is provided between each pipe and articulation ring and between each joint pipe and articulation ring. For attachment, each of the articulation and separation preventive rings is provided with an internal annular groove receiving a split lock ring which is contracted to engage an external recess in the associated pipe by radially extending screws entering the groove at circumferentially spaced locations. The recess engaged by the lock ring attaching an articulation ring to one of the pipes can be made axially wider than the lock ring to permit relative axial movement at the joint.
REFERENCES:
patent: 3306636 (1967-02-01), Hereth
patent: 3345087 (1967-10-01), Hanes et al.
patent: 3433504 (1969-03-01), Hanes
patent: 3515414 (1970-06-01), Kowalewski
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