US PATENT SUBCLASS 73 / 700
FLUID PRESSURE GAUGE

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


73 /   HD   MEASURING AND TESTING

700FLUID PRESSURE GAUGE {20}
701  DF  .~> Null balance type
702  DF  .~> Vibration type {2}
705  DF  .~> Photoelectric
706  DF  .~> With protective separator
707  DF  .~> With fluid pulsation dampener
708  DF  .~> With pressure and/or temperature compensation
709  DF  .~> With excess or maximum registering
710  DF  .~> With steam trap
711  DF  .~> With variable drive
712  DF  .~> With recorder
713  DF  .~> With float
714  DF  .~> Combined
715  DF  .~> Diaphragm {6}
732  DF  .~> Bourdon {7}
744  DF  .~> Piston {1}
747  DF  .~> U-tube liquid column {2}
751  DF  .~> Balance
752  DF  .~> McLeod type
753  DF  .~> Electrical {2}
756  DF  .~> Mounting and connection

DEFINITION

Classification: 73/700

FLUID PRESSURE GAUGE:

(under the class definition) Subject matter for the direct measurement of fluid pressures.

SEE OR SEARCH THIS CLASS, SUBCLASS:

37+, for testing apparatus and processes in which fluids under pressure (positive or negative) are utilized to perform the test, and with which a fluid pressure gauge may be used.

78+, for devices for measuring hardness as an index of fluid pressure (e.g., tonometers, subclass 80, and tire hardness gauges, subclass 81).

115, for obtaining pressure derivatives within an engine cylinder.

152.22, for determining a characteristic of a borehole, a casing, or a drill rigging during drilling by measuring a fluid flow or analyzing a fluid, either (a) by detecting or (b) combined with measuring pressure.

152.27, for determining a characteristic of a borehole, a casing, or a drill rigging by sampling of a borehole formation and measuring a fluid flow or analyzing a fluid, either (a) by detecting pressure or (b) combined with measuring pressure. 152.51+, for determining a characteristic of a borehole, a casing, or a drill rigging by measuring a fluid flow or analyzing a fluid either (a) by detecting or (b) combined with measuring pressure.

299+, for hydrostatic pressure type of liquid level or depth gauge.

384+, for barometers.

861.42+, for pressure differential measuring devices for determining volume or rate of flow.

SEE OR SEARCH CLASS

128, Surgery,

672+, for blood pressure measuring devices.

138, Pipes and Tubular Conduits,

26+, for such devices combined with pressure compensators.

164, Metal Founding,

154.8, and 155.3 for a metal casting apparatus having pressure sensing means. 200, Electricity: Circuit Makers and Breakers

81+, for fluid pressure-operated switches.

374, Thermal Measuring and Testing,

201+, for an expanding fluid type thermometer.