US PATENT SUBCLASS 73 / 232
.~ Expansible chamber

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

861  DF  VOLUME OR RATE OF FLOW {23}
232.~ Expansible chamber {6}
233  DF  .~.~> With variable indicator drive
234  DF  .~.~> Wet type (e.g., liquid seal) {4}
239  DF  .~.~> Reciprocating piston or cylinder {8}
252  DF  .~.~> Oscillating piston
253  DF  .~.~> Rotary piston or cylinder {5}
262  DF  .~.~> Diaphragm or collapsible wall {2}

DEFINITION

Classification: 73/232

(under subclass 861) Meters wherein the fluid is measured in a continuously operable expansible chamber device. The energy of the fluid is usually employed to expand the measuring chamber or chambers, such expansion being also utilized to drive suitable registering means for totalizing the number of expansions.

(1) Note. In defining expansible chamber meters, the term "cylinder" is used to define an external member in the meter organization which surrounds an internal or piston member which constitutes a relatively moving wall for the expansible chamber, the other wall being formed in whole or in part by the cylinder and the cylinder including the abutment against which the fluid to be metered acts. In meters having two or more internal members, both moved by the fluid to be metered and each external to the other and serving as mutual abutments, the internal members are each considered to be pistons, but where one internal member is movable inside of the other, the inner is considered to be a piston and the outer a moving cylinder. Where the metered fluid acts on a cylinder or piston to rotate one relative to the other, the cylinder abutment is termed an "abutment" and the piston abutment is termed a "vane".

SEE OR SEARCH CLASS

91, Motors: Expansible Chamber Type, and see the reference to Class 73 in section III of the class definition of Class 91 for a statement of the line.

92, Expansible Chamber Devices, appropriate subclasses, for an expansible chamber device. For the line between Class 73 and Class 92, see References to Other Classes of the class definition of Class 92, under SEARCH CLASS 73.

220, Receptacles, 377+, 602 and 662+ for a receptacle having a transparent sidewall or sidewall portion.

418, Rotary Expansible Chamber Devices, for rotary expansible chamber devices, per se.