| 摘要 |
An improved ball and socket type joint for use in a fluid conduit and an improved method of forming such a joint are disclosed. The joint comprises ball and socket portions each provided with communicating internal passageways. The socket portion of the joint is formed from two members, namely a cylindrically draped socket retainer body and a socket transition. A first end of the socket retainer body is provided with a ball retaining flange, while a second end is adapted to mate with and be welded to a neck region provided on the socket transition. The ball portion of the joint includes a spherically shaped end. To assemble the joint, the socket retainer is initially disposed about the spherical end of the ball portion so as to enclose it. The second end of the socket retainer is then moved toward the socket transition until they mate. Lastly, the socket retainer and the socket transition are welded together so as to form an integral socket portion for permanently retaining the ball. The joint is provided with at least one packing cylinder for injecting packing material into the socket portion initially to seal the joint and, subsequently, as required, to seal leaks. The joint according to the invention eliminates many problems, including overtightening, associated with previous ball and socket joints including threaded connections between sections of socket portions.
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