(under subclass 218) Apparatus including at least two distributors through which the motive fluid must pass serially in the course of flowing either to the working chamber or exhausting from the working chamber, each distributor having a cyclically moved flow controlling element so arranged that the control of motive fluid by the distributors is effected by the movement of one distributor relative to the movable element of another distributor.
SEE OR SEARCH THIS CLASS, SUBCLASS:
247+, for cyclically operable expansible chamber motors having plural fluid control elements for separately starting and stopping of fluid flow to or from the working chamber in which means are provided for adjusting a fluid control element with respect to another fluid control element to vary the time of occurrence of fluid control events, and especially subclasses 253+ for such motors which have plural fluid control element inlet valve means with means to adjust the control element which stops fluid flow so as to vary the timing of the cut-off event.
444, for expansible chamber motors of other than the cyclically operable type having relatively movable serial valves.
