Patent ID: 6499968
Filing Date: 2002-12-31
Classification: F04B

Abstract:
An integral pump and control valve, comprising;(i) a pump having an axially reciprocating double-acting pumping means for generating a flow of high pressure water from a flow of low pressure water, wherein the pumping means is powered only by the low pressure water and includes a large diameter piston, (ii) a control valve having ports connected to the pump so as to operate the large diameter piston, the ports and pump being so arranged so that the low pressure water is admitted to the pump and waste water is exhausted from the pump alternately on opposite sides of the large diameter piston; and (iii) a tipping bucket comprising two receptacles for water which fill and empty alternately, the tipping bucket being connected to the control valve and being configured to move the control valve between two operating positions which control operation of the large diameter piston.