| 摘要 |
1282690 Pipe joints VETCO OFFSHORE INDUSTRIES Inc 10 Dec 1970 [19 March 1970] 58823/70 Heading F2G In a ball-and-socket pipe joint, the ball 17 is held in its socket 11 by a split ring 21 which is allowed to expand, releasing the ball, when a locking ring-shaped piston 28 is moved hydraulically to a releasing position. The connection as shown is for use in a marine rigger connecting an underwater bore to a surface vessel. The piston 28 is initially moved to the locking position illustrated by admitting fluid under pressure through a pipe 42 to an annular cylinder space 44. To release the ball 17 from its locked position, fluid under pressure is admitted through a pipe 45 causing the piston 28 to move upwardly so that a recess 48 accepts the ring 21 as it expands, Fig. 3 (not shown). If the hydraulic operating means fails, the piston 28 is moved by a mechanical connection which comprises a plate 64, rods 60 and cables 66. In a modification, Figs. 4, 5 (not shown), the recess 48 receives radially moving pins (71) engaging the split ring 21. A rubber ring 53 restrains pivotal movement about the joint. Low friction inlays (91), (90) may be set in the surfaces of the ball and socket 17, 11.
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