(under subclass 1) Subject matter in which the motor drive means for the pump is of the type which includes a movable working member which is motivated by a fluid and the control means comprises means for controlling the flow of motive fluid to or from the motor in response to the sensing means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
21, for a single fluid motor control element which is operated in response to means sensing diverse conditions, one of said diverse conditions being a motive fluid condition.
34, for means for system condition responsive control of an internal combustion-type drive engine.
41, for means for controlling motive fluid to drive motor in response to float means which senses accumulation of pumped liquid in a receiver.
