US PATENT SUBCLASS 141 / 46
.~ System fluid used in seal or in valve or lift operation

Current as of: June, 1999
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141 /   HD   FLUENT MATERIAL HANDLING, WITH RECEIVER OR RECEIVER COACTING MEANS

37  DF  DIVERSE FLUID CONTAINING PRESSURE FILLING SYSTEMS INVOLVING RECEIVER GAS CONTENT MODIFICATION {11}
46.~ System fluid used in seal or in valve or lift operation

DEFINITION

Classification: 141/46

(under subclass 37) Apparatus in which the same gas or source of gas which comprises one of the diverse fluids is used in the apparatus to seal joints or to operate valves or other moving parts of the system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

287, for multiple passage filling head having a gas expanded seal.

347, for interlocked apparatus components responsive to material flow, the material being in some instances a gas.

SEE OR SEARCH CLASS

137, Fluid Handling,

171+, for separate outlets for one of plural diverse fluids controlled by the presence of the other in fluid handling systems of general utility. 222, Dispensing,

129.2, for dispensing systems in which dispensed one fluid operates dispensing means for another.