US PATENT SUBCLASS 91 / 453
.~ Plural actuators for single valve means (367)

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

418  DF  WITH MOTIVE FLUID VALVE {32}
453.~ Plural actuators for single valve means (367)

DEFINITION

Classification: 91/453

(under subclass 418) Apparatus in which a single valve means is provided with two or more separate means to cause operation of the valve means.

(1) Note. When the valving comprises separate relatively movable inlet and exhaust valves for one working chamber, each valve is considered a single valve means within this definition so that a single actuator only on each valve is not included.

SEE OR SEARCH THIS CLASS, SUBCLASS:

367, for motors having position responsive feedback control and plural input signal means for a single valve. NOTE "PLACEMENT OF PATENTS" IN THE CLASS DEFINITION AND THE PARAGRAPH FOLLOWING THE TITLE IN THE SCHEDULE OF THIS CLASS.

425, and the subclasses noted thereunder for expansible chamber motors having valve means having plural actuating means, one of which is responsive to the position of the working member controlled by the valve means.