E - Fixed Constructions
21
B
166/41
E21B 34/12 (2006.01)
Patent
CA 1227421
ABSTRACT OF TIE DISCLOSURE A ball type valve in which the ball is rotated by the cooperation of multiple tracks and multiple track followers. Also, a pressure operated permanent lock-out is disclosed. Pressure applied to a piston withdraws an expander form under a lock ring to release a lock-out sleeve. Continued application of pressure drives the sleeve to valve lock-open position where the sleeve is permanently locked to the housing.
517137
Otis Engineering Corporation
Smart & Biggar
LandOfFree
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