US PATENT SUBCLASS 73 / 252
.~.~ Oscillating piston

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

861  DF  VOLUME OR RATE OF FLOW {23}
232  DF  .~ Expansible chamber {6}
252.~.~ Oscillating piston

DEFINITION

Classification: 73/252

(under subclass 232) Piston meters in which the piston and cylinder relatively oscillate about a fixed center to expand the measuring chamber.

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type,

339+,.

92, Expansible Chamber Devices,

120+, for an expansible chamber devices having an oscillating piston. 417, Pumps,

481+, for an expansible chamber type pump having an oscillating pumping member.