US PATENT SUBCLASS 166 / 84.2
.~.~ Cooling fluid or grease supplied to seals

Current as of: June, 1999
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166 /   HD   WELLS

75.11  DF  ABOVE GROUND APPARATUS {25}
84.1  DF  .~ With seal for reciprocating member {4}
84.2.~.~ Cooling fluid or grease supplied to seals

DEFINITION

Classification: 166/84.2

Cooling fluid or grease supplied to seals:

(under subclass 84.1) Reciprocating member seal wherein means are provided to deliver (a) temperature reducing liquid or gas or (b) lubrication to the flow prevention device.