US PATENT SUBCLASS 91 / 358 R
WORKING MEMBER POSITION FEEDBACK TO MOTIVE FLUID CONTROL

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

358 RWORKING MEMBER POSITION FEEDBACK TO MOTIVE FLUID CONTROL {12}
359  DF  .~> Regenerative or positive feedback type
360  DF  .~> With safety means operable upon input signal loss
361  DF  .~> Electrical input and feedback signal means (459) {2}
364  DF  .~> With means to vary feedback signal in response to rate of working member movement
365  DF  .~> With main valve position feedback to pilot valve
366  DF  .~> Speed governor controlled input signal (458)
367  DF  .~> Plural input signal means for single motor valve (453)
368  DF  .~> Follower type {9}
385  DF  .~> Bias-type input and feedback signal means {2}
388  DF  .~> Fluid operated
389  DF  .~> Adjustable
358 A  DF  .~> Valve locking means

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 91/358

(under the class definition) Apparatus comprising valve means for controlling the flow of motive fluid, signal input means operated manually or by some separate control instrumentality for operating said valve means to cause operation of the motor, the motor providing a feedback signal in response to the position of the working member thereof, said feedback

signal acting to control or modify the operation of said valve means.

(1) Note. This definition does not include a feedback signal responsive to motor chamber fluid pressure build-up or fall off even if such a pressure change is a result of the motor reaching an extreme of its travel, see subclass 433 and the search there noted for such devices.

(2) Note. The term "signal input means" is intended to cover broadly any device for operating the valve means and may be no more than a manually operated handle directly connected thereto.

SEE OR SEARCH THIS CLASS, SUBCLASS:

392+, and the search there noted for expansible chamber motors having working member responsive motive fluid controls.