US PATENT SUBCLASS 417 / 438
.~ Liquid coolant introduced into gas pump chamber or inlet

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
438.~ Liquid coolant introduced into gas pump chamber or inlet

DEFINITION

Classification: 417/438

(under subclass 437) Apparatus in which the fluid pumped is a gas and means are provided to introduce a liquid into the gas while it is in the pump chamber or prior to its introduction into the chamber for the purpose of cooling the gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:

432+, for the application of a separate fluid to a pump valve for lubricating, cooling, etc.