Metering pump

Details Metering pump Metering pump

1992-11-06

1994-11-29

Bertsch, Richard A.

Pumps

Motor driven

Fluid motor

417275, 91491, F04B 4506, F04B 106

Patent

active

053684516

ABSTRACT:
An apparatus for pumping fluid at a substantially constant flow rate, is disclosed. The apparatus contains three transducers which couple one hydraulic fluid to another fluid while preventing contact with said other fluid. The apparatus also contains a timing device for continuously and sequentially withdrawing hydraulic fluid from the first fluid transducer while simultaneously pumping hydraulic fluid to the second fluid transducer, thereafter withdrawing hydraulic fluid from the second fluid transducer while simultaneously pumping hydraulic fluid to the third fluid transducer means, and thereafter withdrawing hydraulic fluid from the third fluid transducer. The timing means preferably includes a plurality of hydraulic cylinders and pistons, and a cam assembly.

REFERENCES:
patent: 2612837 (1952-10-01), Midgette
patent: 2673525 (1954-03-01), Lucas
patent: 3213804 (1965-10-01), Sobey
patent: 3937400 (1976-02-01), Krause
patent: 4068641 (1978-01-01), Johnson
patent: 4269569 (1981-05-01), Hoover
patent: 4556371 (1985-12-01), Post
patent: 4687426 (1987-08-01), Yoshimura
patent: 4790732 (1978-12-01), Yamatani
patent: 4844706 (1989-07-01), Katsuyama

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