Metering pump with piston and diaphragms

Details Metering pump with piston and diaphragms Metering pump with piston and diaphragms

1997-08-05

1999-08-10

Thorpe, Timothy S.

Pumps

Motor driven

Fluid motor

417389, F04B 4306

Patent

active

059348860

ABSTRACT:
A diaphragm pump is powered by fluctuating pressure in a pressurized conduit. A three way valve is cycled to alternately pressurize and vent the pump. A power diaphragm drives a piston having a skirt with a reduced end wall to displace a quantity of hydraulic fluid from a pump chamber to drive a pumping diaphragm. An inlet of the pump admits a quantity of fluid to be discharged via a pump outlet. A spring component biases the piston to return same upon venting of the pressurized conduit. The diaphragm pump is shown in a pumping system wherein a primary pump and an intermittently cycled three way valve operate the diaphragm pump to inject fluid into the output conduit from the primary pump.

REFERENCES:
patent: 3604213 (1971-09-01), Parsons
patent: 4523901 (1985-06-01), Schippers et al.
patent: 5279504 (1994-01-01), Williams

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