Pipe joints or couplings – With assembly means or feature
Patent
1985-09-19
1987-02-17
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
285 85, 285 92, F16L 3500
Patent
active
046434569
ABSTRACT:
A locking thread saver for use in connecting a rotatable member such as a length of steel drill pipe to a power transmission utilizes an internally mounted locking plate powered by an internally carried actuator to prevent the premature disengagement of the drill pipe from the transmission when attempting to break the lengths of steel pipe as when the pipe is retracted from a bore hole. The locking member is retained within an internal slot and moves into a cooperative locking position with a slot formed in the end of the drill pipe section connected to the to the thread saver. The locking member may be moved selectively to and from such engaging position to facilitate the removal of the drill pipe section adjacent the thread saver or the removal of a drill pipe section distal the thread saver and connected thereto by an intermediate drill pipe section.
REFERENCES:
patent: 903435 (1908-11-01), Barrott
patent: 1407335 (1922-02-01), Reynolds
patent: 2118350 (1938-05-01), Holt
patent: 2244124 (1941-06-01), Shemeley
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