Liquid dosage piston pump

Details Liquid dosage piston pump Liquid dosage piston pump

1979-12-31

1982-06-22

Freeh, William L.

Pumps

Processes

417435, 417503, 7386416, 734256P, 7386463, F04B 3900, F04B 2100, G01N 114

Patent

active

043360009

ABSTRACT:
The invention relates to a method of removing air or gas bubbles tending to collect in the "dead space" of a piston burette or another liquid dosage piston pump during operation thereof. The venting is performed by sucking a substantial volume of air into the pump cylinder in addition to a certain amount of liquid, and the air and part of the liquid within the pump cylinder is thereafter discharged therefrom. A piston dosage pump for carrying out this method comprises a valve mechanism by means of which the pump cylinder may be selectively communicated not only with a liquid inlet conduit and a liquid outlet conduit, but also with an air inlet passage.

REFERENCES:
patent: 1966498 (1934-07-01), Gross
patent: 3042981 (1962-07-01), DeLione
patent: 3684409 (1972-08-01), Sanz
patent: 3848470 (1974-11-01), Hargash
patent: 4136708 (1979-01-01), Cosentino
patent: 4231990 (1980-04-01), Jottier

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