US PATENT SUBCLASS 251 / 175
.~ Fluid pressure

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

Internet Version by PATENTEC © 1999      Terms of Use


251 /   HD   VALVES AND VALVE ACTUATION

157  DF  WITH MEANS TO INCREASE HEAD AND SEAT CONTACT PRESSURE {8}
175.~ Fluid pressure

DEFINITION

Classification: 251/175

(under subclass 157) Devices in which the means comprises fluid pressure.