Liquid metering pumps

Details Liquid metering pumps Liquid metering pumps

1976-03-01

1977-05-03

Freeh, William L.

Pumps

Expansible chamber type

Pressure responsive distributor opened responsive to pumping...

417566, 417489, F04B 700

Patent

active

040211533

ABSTRACT:
This invention relates to liquid metering pumps and according to the invention such a pump comprises a cylinder permanently connected to an inlet passage for the liquid and in which said cylinder a plunger piston is arranged to slide said piston co-operating with a sealing gland on the inlet side. The piston is urged by an elastic member into contact with a reciprocable actuating rod which co-operates with a sealing gland on the outlet side. The two sealing glands are separated by a spacer to form an annular chamber around the plunger piston and the actuating rod.

REFERENCES:
patent: 835162 (1908-11-01), Morrill
patent: 1513870 (1924-11-01), Sparrow
patent: 1587830 (1926-06-01), Heine
patent: 2064750 (1936-12-01), Hurst
patent: 2569903 (1951-10-01), Santarelli
patent: 2574779 (1951-11-01), Fels
patent: 2591969 (1952-04-01), Sawchuk
patent: 2795195 (1957-06-01), Amblard et al.
patent: 3719437 (1973-03-01), Schuhmann

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