Patent ID: 7040868
Filing Date: 2006-05-09
Classification: F04D

Abstract:
1. In a system for pumping fluid including an engine, an engine governor, and a pump, said engine being connected to and operating the pump having an outlet and an inlet and said system being connectable to a fluid source and wherein said pump is adapted to pump liquid and intermittently pump gasses, the improvement comprising: a pressure transducer connected to the governor of the engine and the outlet of the pump and being adapted to measure the fluid discharge pressure downstream of the pump and deliver a signal (A) responsive to said measured discharge pressure; said governor being connected to the engine and adapted for controlling the operating speed of the engine and thereby the speed of the pump in response to changes in the magnitude of received signal (A); and a controlling element connected to the governor and the pressure transducer and being adapted to receive signal (A) and override the governor and control the operation of the engine and the pump in response to pump discharge pressure fluctuation within a preselected period of time of less than 1 second.