(under subclass 321) Apparatus in which there is provided means forming an expansible and contractible chamber, said chamber serving both as an expansible motor chamber and an expansible pumping chamber.
(1) Note. The pump fluid under this definition may comprise a portion or component of the combustible charge of an internal combustion engine, provided said charge is discharged from the chamber prior to combustion thereof.
(2) Note. This definition excludes those pumps in which the fluid is pumped in a separate chamber and then discharged through the motor chamber even though the energy of the fluid may be increased in the motor chamber. See subclasses 377+.
SEE OR SEARCH THIS CLASS, SUBCLASS:
105+, for apparatus in which one fluid is caused to be pumped by the condensation of a motivating fluid.
348, for rotary expansible chamber devices having a common pump and motor working member in which the common member defines a common rotating pump and motor chamber.
