(under the class definition) Apparatus comprising fluid flow control means for varying the flow of pumped fluid, and including means operated in response to a condition or change in condition occurring externally of the system other than a manually induced condition or change.
(1) Note. Additional structure or modification of the pump structure to respond to or compensate for the external condition must be included and hence mere exposure of the pump or pump part to an external condition is excluded from this definition.
(2) Note. Fluid flow control varying means under this definition is intended to include means for varying the volume or pressure of pumped fluid delivered by the pump.
