US PATENT SUBCLASS 138 / 30
.~ Variable capacity chambers

Current as of: June, 1999
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138 /   HD   PIPES AND TUBULAR CONDUITS

26  DF  WITH PRESSURE COMPENSATORS {2}
30.~ Variable capacity chambers {1}
31  DF  .~.~> Piston or plunger type

DEFINITION

Classification: 138/30

(under subclass 26) Devices in the form of a chamber whose capacity is variable usually by means of a flexible diaphragm or sliding plunger.

SEE OR SEARCH CLASS

239, Fluid Sprinkling, Spraying, and Diffusing,

89, and 96 for accumulator chambers which store fluid under pressure for subsequent delivery to a nozzle.