US PATENT SUBCLASS 73 / 37
WITH FLUID PRESSURE

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

37WITH FLUID PRESSURE {8}
37.5  DF  .~> Dimension, shape, or size {3}
38  DF  .~> Porosity or permeability
39  DF  .~> Fluid pressure brake system or unit
40  DF  .~> Leakage {8}
49.4  DF  .~> With ram pressure inducer
49.5  DF  .~> Pipe {1}
49.7  DF  .~> Motor part or auxiliary
49.8  DF  .~> Clamp, plug, or sealing feature

DEFINITION

Classification: 73/37

(under the class definition) Subject matter for subjecting a specimen directly to fluid pressure (positive or negative) to determine properties of the specimen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

1.16+, for proving or calibrating volume or rate of flow meters and elements thereof.

1.57+, for proving or calibrating pressure responsive devices and gauges.

12.01+, for testing by impact or shock where the impact or shock is transmitted by a fluid.

807, and 838+, for the use of fluids to determine the bursting strength of sheet material.

SEE OR SEARCH CLASS 138, Pipes and Tubular Conduits,

90, for test plug closures for conduits.

141, Fluent Material Handling, With Receiver or Receiver Coacting Means, for processes and apparatus for filling of receivers with gases, liquids, or fluent solids, or for evacuating receivers, particularly

4+, and 65+ for gas filling or evacuating.

364, Electrical Computers and Data Processing Systems,

558, for measuring the pressure of a fluid which involves a computation and only nominal claimed structure to the measuring device.

445, Electric Lamp or Space Discharge Component or Device Manufacturing, for processes and apparatus for gas filling and/or evacuation of lamp and discharge device envelopes in connection with other manufacture or repair operations.