Pumping system with control valve

Details Pumping system with control valve Pumping system with control valve

1985-11-29

1987-08-11

Rolla, Joseph J.

Dispensing

With cleaning means

222318, 222383, 137523, 137541, 239112, 239127, 417305, B67D 506, F04B 4902

Patent

active

046855920

ABSTRACT:
A pumping system for containing and dispensing liquids, such as poisonous or hazardous chemicals and the like. The system has a spring-biased, manually-openable by pass valve incorporated therein which is selectively positionable in various positions without the user coming in contact with the poisonous or hazardous chemicals and the like.

REFERENCES:
patent: 1172959 (1916-02-01), Dormon
patent: 2288954 (1942-07-01), Reid
patent: 2393406 (1946-01-01), Parsons
patent: 2434771 (1948-01-01), Mueller et al.
patent: 3153495 (1965-10-01), Williams et al.
patent: 3227326 (1966-01-01), Beamer
patent: 4108336 (1978-08-01), Anderson
patent: 4177937 (1979-12-01), Stevens et al.
patent: 4246924 (1981-01-01), Droitsch et al.
patent: 4386637 (1983-06-01), Buchanan et al.

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