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Class Information
Number: 137/630.12
Name: Fluid handling > Systems > Sequentially progressive opening or closing of plural valves > Pressure equalizing or auxiliary shunt flow > One valve seats against other valve (e.g., concentric valves) > Gate
Description: Systems in which at least one of the valves has a reciprocatory, rectilinear motion substantially normal to the fluid path.










Patents under this class:

Patent Number Title Of Patent Date Issued
8302630 Gate valve with equalizer port Nov. 6, 2012
7743790 Shutter and gate valve assemblies for vacuum systems Jun. 29, 2010
7455076 Apparatus and method for controlling exhaust pressure in semiconductor manufacturing Nov. 25, 2008
6739311 Theft prevention device May. 25, 2004
6305349 Sliding gate exhaust brake assembly Oct. 23, 2001
6174376 Apparatus for evacuating a process chamber Jan. 16, 2001
5370155 Wedge-type gate valve Dec. 6, 1994
5103786 Sliding exhaust brake system Apr. 14, 1992
5101861 Slide valve Apr. 7, 1992
4917221 Slide type exhaust brake system Apr. 17, 1990
4903733 Sliding exhaust brake system Feb. 27, 1990
4901827 Slide type exhaust brake system Feb. 20, 1990
4886148 Sliding exhaust brake having main valve and auxiliary valve with flow space therebetween Dec. 12, 1989
4819696 Slide type exhaust brake system Apr. 11, 1989
4779649 Gate valve with camming wedge, pressure equalizer, and replaceable bleeder valve Oct. 25, 1988
4678008 Wedge type gate valves Jul. 7, 1987
4480659 Gate stop valve Nov. 6, 1984
4408634 Gate stop valve Oct. 11, 1983
4205704 Exhaust brake valve Jun. 3, 1980
4177833 Valves having a pressure equalizer across dual face seals Dec. 11, 1979
4054156 Exhaust brake valve Oct. 18, 1977











 
 
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