US PATENT SUBCLASS 91 / 510
.~.~ Stand-by means utilizes an auxiliary motive fluid source for another working member to drive same load

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

508  DF  PLURAL RELATIVELY MOVABLE OR RIGIDLY INTERCONNECTED WORKING MEMBERS {11}
509  DF  .~ Having (1) stand-by or (2) redundant means enabling load to be driven upon failure of primary load moving means {1}
510.~.~ Stand-by means utilizes an auxiliary motive fluid source for another working member to drive same load

DEFINITION

Classification: 91/510

Stand-by means utilizes an auxiliary motive fluid source for another working member to same load:

(under subclass 509) Apparatus wherein the stand-by means comprises means to activate or utilize an auxiliary source of motive fluid for causing a working member, other than the disabled one, to drive the load which was previously driven by the disabled working member (i.e., redundant system).

(1) Note. See section B(1) and B(2) under (4) Note in Class 91 definitions for a statement of what constitutes a properly claimed motive fluid source for classification in this class.

(2) Note. Included in this subclass are those devices having plural motors driving the same load and each motor having its own source of motive fluid, whereby upon failure of one of the motors, the other motor drives the load using either (a) its source of motive fluid, or (b) its source of motive fluid in addition to that motive fluid previously supplied to the failed motor.