US PATENT SUBCLASS 73 / 864.35
.~.~.~ Chamber with alternate pressure or vacuum applier

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

863  DF  SAMPLER, SAMPLE HANDLING, ETC. {11}
864  DF  .~ Capture device {9}
864.34  DF  .~.~ Sample meter or pump {1}
864.35.~.~.~ Chamber with alternate pressure or vacuum applier

DEFINITION

Classification: 73/864.35

Chamber with alternate pressure or vacuum applier:

(under subclass 864.34) Subject matter having a chamber and means to sequentially apply at least two different pressures to the chamber.

(1) Note. Usually during the application of the lower pressure or vacuum the sample flows into the chamber and during the application of the higher pressure the sample flows out of the chamber.

SEE OR SEARCH CLASS

417, Pumps,

118+, for pumps, per se.