US PATENT SUBCLASS 374 / 203
.~.~.~ Bourdon tube or bellows

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

Internet Version by PATENTEC © 1999      Terms of Use


374 /   HD   THERMAL MEASURING AND TESTING

100  DF  TEMPERATURE MEASUREMENT (E.G., THERMOMETER) {13}
187  DF  .~ Mechanical (e.g., expansion or contraction of materials) {10}
201  DF  .~.~ Expanding fluid {2}
203.~.~.~ Bourdon tube or bellows

DEFINITION

Classification: 374/203

Bourdon tube or bellows:

(under subclass 201) Subject matter wherein the fluid is confined to an elastic tube having either (1) a flexible corrugated wall, or (2) a curved or twisted configuration such that an increase of fluid pressure tends to straighten the tube.

SEE OR SEARCH CLASS

73, Measuring and Testing,

729.1, for pressure measurement by a bellow; and subclass 732 for pressure measurement by a Bourdon tube.