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Class Information
Number: 137/329.06
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > With provision of alternate wear parts > Valve heads and/or seats > Successively used adjacent independent elements
Description: Devices in which are stored adjacently a plurality of separate elements forming duplicate surfaces successively used.

Patents under this class:

Patent Number Title Of Patent Date Issued
4880029 Drain valve Nov. 14, 1989
4848728 Coupling arrangement Jul. 18, 1989
4355784 Method and apparatus for controlling back pressure Oct. 26, 1982
4351355 Drain valve Sep. 28, 1982

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