US PATENT SUBCLASS 91 / 361
.~ Electrical input and feedback signal means (459)

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

358 R  DF  WORKING MEMBER POSITION FEEDBACK TO MOTIVE FLUID CONTROL {12}
361.~ Electrical input and feedback signal means (459) {2}
362  DF  .~.~> Means provides incremental movements (e.g., stepper type)
363 R  DF  .~.~> Follower type {1}

DEFINITION

Classification: 91/361

(under subclass 358) Apparatus in which the input signal is electrical and the signal created in response to the position of the working member operates electrically to modify or control the operation of the valve means.

(1) Note. The signal created in response to the position of the working member may control or modify the operation of the valve means by electrically altering the input signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

459, for expansible chamber motors with electrically operated motive fluid control valves not involving an electrical feedback.