US PATENT SUBCLASS 166 / 84.1
.~ With seal for reciprocating member

Current as of: June, 1999
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166 /   HD   WELLS

75.11  DF  ABOVE GROUND APPARATUS {25}
84.1.~ With seal for reciprocating member {4}
84.2  DF  .~.~> Cooling fluid or grease supplied to seals
84.3  DF  .~.~> Rotary blowout preventer type
84.4  DF  .~.~> Fluid pressure actuated seals
84.5  DF  .~.~> Seal fixedly mounted to rod

DEFINITION

Classification: 166/84.1

With seal for reciprocating member:

(under subclass 75.11) Above ground apparatus comprising a flow prevention device for rod, pipe, tubing, wireline moving into and out of a well.

(1) Note. The inner member must be free to reciprocate and not anchored against movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

82.1+, for releasable seal or cleaner for inner member and unfastening means.

86.1+, for inner member anchor or seal with valve.

88.1+, for inner member anchor or seal with lateral port.

SEE OR SEARCH CLASS

277, Joint Packing, 5+, for a packing which opens or yields to allow a projection on the rod to pass, subclasses 19+, for sealing means with external fluid receiver usually between a casing and an inner rod, pipe or cable, subclass 31 for rotatable packing for

axially moving rod, subclass 33 for axially biased rod.