(under subclass 305) Subject matter including catch means responsive to the line pressure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
83, for line pressure responsive auxiliary latch means.
102, and 104+, for similar means combined with a fluid pressure seal.
SEE OR SEARCH CLASS
166, Wells, 55.4+, for devices which perforate or split well tubing by explosive means, and subclass 212 for a fluid pressure actuated expansible anchor.
251, Valves and Valve Actuation,
94, for fluid pressure biased latches in valve actuator combinations.
294, Handling: Hand and Hoist-Line Implements,
86.24+, for expanding grapples adapted for use in a well bore, and subclasses 93+ for expanding grapples of general utility.
