US PATENT SUBCLASS 251 / 249.5
.~.~ Worm type

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

213  DF  MECHANICAL MOVEMENT ACTUATOR {10}
248  DF  .~ Gear {4}
249.5.~.~ Worm type

DEFINITION

Classification: 251/249.5

(under subclass 248) Subject matter wherein the gearing includes a rotary ember having coaxial, helical thread means on its outer surface meshing with gear means.