(under the class definition) Apparatus in which the working member of the motor is operated by a charge of expansible motive fluid which has been completely isolated in a storage chamber separate from the expansible chamber; i.e., the storage chamber at a given time is cut off from both the source of supply and the expansible chamber.
(1) Note. The storage chamber generally holds only a sufficient quantity of motive fluid for one stroke of the working member and is recharged before each succeeding stroke.
(2) Note. The charge of motive fluid from the storage chamber may constitute the only motive fluid for impelling the working member or may be supplemented with additional motive fluid.
(3) Note. The storage chamber may not be another expansible chamber of the motor or another motor.
