US PATENT SUBCLASS 251 / 268
.~.~.~.~ Inverted cup-shape

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

213  DF  MECHANICAL MOVEMENT ACTUATOR {10}
264  DF  .~ Screw {5}
266  DF  .~.~ Non-reciprocating actuator {3}
267  DF  .~.~.~ Internal thread {1}
268.~.~.~.~ Inverted cup-shape {1}
269  DF  .~.~.~.~.~> Separable actuator bushing

DEFINITION

Classification: 251/268

(under subclass 267) Subject matter wherein the actuator has a cup-shaped end with internal threads therein and the cup-shaped end encloses the end of the valve stem.