04886241 is referenced by 48 patents and cites 18 patents.

A fluid valve for use in elevated pressure and temperature conditions. Composition material wiper rings are provided in the packing bore between the packing follower and the packing box ring. The composition wiper rings have an inner diameter substantially the same as the valve stem diameter to inhibit the extrusion of packing material during sliding valve operation.

Title
Valve stem packing containment for high pressure, high temperature
Application Number
7/97617
Publication Number
4886241
Application Date
September 16, 1987
Publication Date
December 12, 1989
Inventor
Robert T Wilson
Marshalltown
IA, US
James R Davis
Marshalltown
IA, US
Agent
Marshall O Toole Gerstein Murray & Bicknell
Assignee
Fisher Controls International
MO, US
IPC
F16J 15/40
F16J 15/20
F16K 41/04
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