(under subclass 418) Apparatus in which the valve means comprises a unitary inlet and exhaust valve for controlling the motive fluid flow for a single working chamber having no relatively movable parts for the valving function.
SEE OR SEARCH THIS CLASS, SUBCLASS:
323, for cyclically operable expansible chamber motors having relatively movable unitary inlet and exhaust valves for opposed working chambers.
465, for double acting expansible chamber motors having relatively movable unitary inlet and exhaust valves for controlling the opposed chambers thereof.
