(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.
