US PATENT SUBCLASS 137 / 243.1
.~.~.~.~ Concentric stem

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

237  DF  WITH CLEANER, LUBRICATION ADDED TO FLUID OR LIQUID SEALING AT VALVE INTERFACE {2}
238  DF  .~ Cleaning or steam sterilizing {4}
242  DF  .~.~ Mechanical cleaning {2}
243  DF  .~.~.~ Valve grinding motion of valve on seat {6}
243.1.~.~.~.~ Concentric stem

DEFINITION

Classification: 137/243.1

(under subclass 243) Devices in which the actuator is made up of an axial rod mounted within a sleeve.