US PATENT SUBCLASS 251 / 181
.~.~.~ Plug


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}
176  DF  .~ Spring {3}
180  DF  .~.~ Rotary valve {2}
181.~.~.~ Plug {2}
182  DF  .~.~.~.~> Expanding
183  DF  .~.~.~.~> Encased {1}


DEFINITION

Classification: 251/181

(under subclass 180) Subject matter wherein the valve is a rotary plug.