US PATENT SUBCLASS 166 / 80.1
.~ Having retractable pipe section to allow closing of gate type valve or flapper valve for rod or pipe

Current as of: June, 1999
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166 /   HD   WELLS

75.11  DF  ABOVE GROUND APPARATUS {25}
80.1.~ Having retractable pipe section to allow closing of gate type valve or flapper valve for rod or pipe

DEFINITION

Classification: 166/80.1

Having retractable pipe section to allow closing of gate type valve or flapper valve for rod or pipe:

(under subclass 75.11) Above ground apparatus comprising (a)

a discrete tubular member axially shiftable to enable a flow control means; e.g., gate valve, to stop flow or (b) a hinged plate allowing passage of a tubular member or bar in one direction and preventing upward flow after removal of a tubular member or bar.

(1) Note. The axially adjustable member remains assembled with the rest of the device at all times.

(2) Note. The pipe section does not have to actuate the valve.