US PATENT SUBCLASS 91 / 459
.~ Electrically operated (275) (361)

Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

418  DF  WITH MOTIVE FLUID VALVE {32}
459.~ Electrically operated (275) (361)

DEFINITION

Classification: 91/459

(under subclass 418) Apparatus in which the valve means includes a movable part which is caused to move by a means operated by an electrical current to effect control of the motive fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

42, for expansible chamber motors with locking means having correlated control of the motive fluid in which the correlated control is accomplished by electrical means.

248, for cyclically operable expansible chamber motors with electrically operated means for adjustably controlling the timing of a fluid control event.

275, for cyclically operable expansible chamber motors having electrically operated valve means. NOTE "PLACEMENT OF PATENTS" IN THE CLASS DEFINITION AND THE PARAGRAPH FOLLOWING THE TITLE IN THE SCHEDULE OF THIS CLASS.

361+, for expansible chamber motors with working member feedback control in which the valve means is actuated electrically. NOTE "PLACEMENT OF PATENTS" IN THE CLASS DEFINITION AND THE PARAGRAPH FOLLOWING THE TITLE IN THE SCHEDULE OF THIS CLASS.