Patent ID: 6109296
Filing Date: 2000-08-29
Classification: F16K,Y10T

Abstract:
A combination of a motor, a pump, a diaphragm valve and a pressure switch comprising:a motor drivingly connected to a pump, the pump connected by a pipe to a diaphragm valve, the diaphragm valve connected by a reservoir pipe to a reservoir, the reservoir connected by a distribution pipe to the distribution system, and a switch connected to the reservoir pipe and to the motor;i) the diaphragm valve having:a) a housing having an inlet, and outlet, and a passageway circumscribed by a valve seat having a seat sealing surface for the flow of fluid from the inlet to the outlet;b) and a valve member including a diaphragm within said housing and displaceable towards or away from said valve seat to control the flow therethrough;c) said diaphragm including an outer peripheral section secured over an opening in the housing in alignment with said valve seat, a valve-closure section having a perimeter and center area, the valve-closure section displaceable with respect to the valve seat for controlling the flow therethrough, and an intermediate flexible section permitting the displacement of said valve-closure section,d) said valve-closure section including a valve seating surface surrounding the center area which contacts the valve seat when the valve member is fully closed;e) said housing further including a cover defining a control chamber between the cover and the diaphragm; andf) a spring between the cover and the diaphragm;ii) a supplement control valve;iii) a tube fluidly connecting the supplemental control valve to the control chamber;iv) said tube and said spring being elements of means for fully closing the sealing surface against the valve seat; andv) a notch in said valve-closure section, said notch extending from the perimeter of the valve-closure section across the sealing surface and into the center area.