(under subclass 16) Apparatus in which the lower pressure fluid is controlled by the pressure condition in the higher pressure line or in a motor working chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28+, for expansible chamber motors in which motive fluid is supplied to a working chamber through different flow paths, the flow in the second path being activated by a pressure or flow condition in the first path.
33, for expansible chamber motors in which motive fluid is supplied to a working chamber through different flow paths, the activation of one path acting to disable a second flow path by the pressure of fluid acting in said one path as, for example, by a shuttle valve.
