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Class Information
Number: 137/329
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > With provision of alternate wear parts
Description: Devices having a part or parts made in attached duplicate form or of extensive area movably mounted in such a manner the worn or injured part may be replaced by a duplicate part or another unworn surface to restore the device to its former condition.

Sub-classes under this class:

Class Number Class Name Patents
137/329.01 Valve heads and/or seats 20

Patents under this class:

Patent Number Title Of Patent Date Issued
6446664 Erosion resistant wear sleeve for high pressure valves Sep. 10, 2002
4453698 Stuffing box with O-ring detent for control mechanism of emergency valve Jun. 12, 1984
4354519 Non-drip valve apparatus Oct. 19, 1982
3970283 Pouring of molten metals Jul. 20, 1976
3955592 Check valve May. 11, 1976

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