US PATENT SUBCLASS 91 / 517
.~.~ Condition sensed is working member speed or working fluid pressure of another motor (i.e., fluid pressure or flow to or from expansible chamber of the other motor)

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}
511  DF  .~ Condition responsive means for modifying working member operation {5}
517.~.~ Condition sensed is working member speed or working fluid pressure of another motor (i.e., fluid pressure or flow to or from expansible chamber of the other motor)

DEFINITION

Classification: 91/517

Condition sensed is working member speed or working fluid pressure of another motor (i.e., fluid pressure or flow to or from expansible chamber of the other motor):

(under subclass 511) Apparatus wherein the external condition is the condition of a motor other than the one having its operation modified (e.g., speed, fluid pressure, amount of flow or lack thereof to or from the other motor).

(1) Note. Specifically excluded from this subclass are patents wherein the condition of the other motor is the position of its working member. Patents to plural relatively movable working member wherein the position of one working member is responsible for the control of another, are found in subclasses 170+. But see subclass 519 for nonrelatively movable interconnected working members controlled in response to the position thereof.

(2) Note. The condition of a motor may be sensed at any point between the motor and its control valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

509, for standby working member means which is activated when another working member means becomes inoperative.

512, for working members whose operation is modified in response to its load; and for working members whose operation is modified in response to the load of another motor. See also subclass 512 for a statement as to what is considered to be a load.

513, for a motor which is controlled in response to the sensed position of a motive fluid control valve for another motor.