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Class Information
Number: 137/315.23
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > Assembling or disassembling rotary valve > Butterfly valve > Having valve head or seat packing

Patents under this class:

Patent Number Title Of Patent Date Issued
7225825 Valve seal and method of installing a valve seal Jun. 5, 2007
6497245 Intake air controller for internal combustion engine and manufacturing the same Dec. 24, 2002
5370148 Butterfly valve assembly and method of manufacture Dec. 6, 1994
5357997 Valve with segmented retainer ring Oct. 25, 1994
5284178 Butterfly valve Feb. 8, 1994
5018548 Segmented coupling for pipes May. 28, 1991
4967779 Method of installing a valve seat in a valve body Nov. 6, 1990
4899775 Corrosion-resistant overlay for the edge of butterfly valves Feb. 13, 1990
4844115 Butterfly valve Jul. 4, 1989
4699357 Reinforced industrial butterfly valve Oct. 13, 1987
4645180 Wire form type insert retainer for a wafer style butterfly valve Feb. 24, 1987
4575048 Insert retainer for a wafer style butterfly valve Mar. 11, 1986
4541612 Rotatable shaft assembly Sep. 17, 1985
4003394 Disc valve with improved seal ring Jan. 18, 1977

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