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Class Information
Number: 137/315.19
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > Assembling or disassembling rotary valve > Rotary ball valve > Particular valve seat or interface seal
Description:










Sub-classes under this class:

Class Number Class Name Patents
137/315.2 Replaceable 16


Patents under this class:

Patent Number Title Of Patent Date Issued
6843889 Coke drum bottom throttling valve and system Jan. 18, 2005
5590680 External valve operating means Jan. 7, 1997
5531244 Hemispherical ball valve Jul. 2, 1996
5275191 Ball valve Jan. 4, 1994
5193573 Ball valve having replaceable seals under full service pressure Mar. 16, 1993
4968004 Shutoff and control valve Nov. 6, 1990
4960262 Ball valve and methods of fabrication Oct. 2, 1990
4953587 Ball valves for pipelines Sep. 4, 1990
4869450 Ball valve Sep. 26, 1989
4739792 Valve Apr. 26, 1988
4708158 Ball-type stop cocks having standard matching flanges Nov. 24, 1987
4546790 Fluid valve Oct. 15, 1985
4523608 Rotary ball valve assembly Jun. 18, 1985
4519412 Valve and seal therefor May. 28, 1985
4460012 Cartridge-type valve Jul. 17, 1984
4327895 Ball valve May. 4, 1982
4226260 Single lever faucet plastic cartridge valve Oct. 7, 1980
4175580 Bottom entry positive acting ball valve Nov. 27, 1979
4164343 Eccentric ball type valve Aug. 14, 1979
4135545 Ball valve seat assembly having a swaged seat ring to retain the face seal Jan. 23, 1979
4089345 Discharge valve May. 16, 1978
3985334 Ball valve Oct. 12, 1976
3937441 Rotary valve Feb. 10, 1976











 
 
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