Pipe joints or couplings – With fluid pressure seal
Patent
1982-09-27
1985-10-29
Callaghan, Thomas F.
Pipe joints or couplings
With fluid pressure seal
285184, 285281, 285DIG1, F16L 2700
Patent
active
045497532
ABSTRACT:
A rotary joint is provided which is particularly useful in deep-sea diving suits, and which can be constructed in such a way such that resistance to rotational movement or the potential for leakage, does not increase substantially with external pressure on the joint. Preferably, the joint has a sealing member, a retaining member, and a central member disposed axially between the sealing and retaining members. The central member has an annular first end dimensioned and axially slidably mounted on a retaining end of the retaining member so as to define a first variable volume chamber therebetween. The central member also has a second end with inner and outer extending annular bearing members, each concentric with, and normally rotatably abutting a corresponding sealing surface portion on the sealing member, so as to define annular side walls of a second chamber. The second chamber is interconnected with the first chamber.
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Callaghan Thomas F.
Can-Dive Services Ltd.
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