US PATENT SUBCLASS 137 / 243.5
.~.~.~.~ Nut releasable from body and/or 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}
243.5.~.~.~.~ Nut releasable from body and/or stem

DEFINITION

Classification: 137/243.5

(under subclass 243) Devices comprising screw actuated valves in which the nut is disconnected from the body or the stem, or both, to permit the valve head to rotate without reciprocating.

SEE OR SEARCH THIS CLASS, SUBCLASS:

243.2, for valves in which a spring permits limited movement between the nut and the body or stem.