US PATENT SUBCLASS 251 / 326
.~ Gate

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

318  DF  RECIPROCATING VALVE {7}
326.~ Gate {3}
327  DF  .~.~> Bifaced
328  DF  .~.~> Seats
329  DF  .~.~> Bodies

DEFINITION

Classification: 251/326

(under subclass 318) Devices wherein the valve moves

transversely of the flow passage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

157+, especially subclasses 167+, 175 and 193+ for gate valves having means to increase the contact pressure between the head and seat.

300, and 301+, for pivoted gates.

SEE OR SEARCH CLASS

137, Fluid Handling, 625.45, for multiway pivoted gate units and subclass 630.12 for sequentially opening gate valves.