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Class Information
Number: 137/315.31
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > Assembling or disassembling reciprocating valve > Gate valve > Having particular valve seat

Sub-classes under this class:

Class Number Class Name Patents
137/315.32 Including seal 5

Patents under this class:

Patent Number Title Of Patent Date Issued
5464035 Gate-type, side-ported, line blind valve Nov. 7, 1995
5247960 Replacement valve seat device with expandable ring Sep. 28, 1993
4909272 Gate valve Mar. 20, 1990
4765361 Ported gate valve Aug. 23, 1988
4744386 Modular hydraulic actuator May. 17, 1988
4541453 High temperature slide valve Sep. 17, 1985
4474205 Sliding blade apparatus for closing conduits Oct. 2, 1984
4378817 Slide valve assembly Apr. 5, 1983
4316483 Valve having wear-prone parts removable through bonnet area Feb. 23, 1982
4307747 Dust trap with removable valve seat Dec. 29, 1981

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