(under subclass 392) Apparatus in which in response to motor position a working chamber of the motor which is increasing in size is opened to exhaust so as to vent motive fluid therefrom.
(1) Note. The motive fluid need not be vented directly from the working chamber, but may be vented from the inlet line upstream from the chamber if the fluid in the chamber is capable of escaping from the vent.
SEE OR SEARCH THIS CLASS, SUBCLASS:
47+, for expansible chamber motors in which motive fluid is constantly applied to a working chamber thereof, motor movement being controlled by operating a vent valve for said working chamber.
399, for expansible chamber motors in which a by-pass between an expanding chamber and an opposed contracting chamber is opened in response to position, the contracting chamber being otherwise closed or the outlet thereof being restricted.