US PATENT SUBCLASS 303 / 4
.~ Fluid pressure and vacuum

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

Internet Version by PATENTEC © 1999      Terms of Use


303 /   HD   FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS

2  DF  MULTIPLE SYSTEMS {2}
4.~ Fluid pressure and vacuum

DEFINITION

Classification: 303/4

Fluid is used at two pressures, the one above atmospheric and the other at atmospheric pressure, in opposition to a partial vacuum.

(1) Note. See this class, subclasses 12 and 31 for cases in which a vacuum alone is used.