US PATENT SUBCLASS 251 / 185
.~.~.~ Spring in fluid
Current as of:
June, 1999
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251 /
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VALVES AND VALVE ACTUATION
157
DF
WITH MEANS TO INCREASE HEAD AND SEAT CONTACT PRESSURE
{8}
176
DF
.~ Spring {3}
180
DF
.~.~ Rotary valve {2}
185
.~.~.~ Spring in fluid
DEFINITION
Classification: 251/185
(under subclass 180) Subject matter wherein the pressing means comprises a spring exposed to the line flow.