Positive displacement piston metering pump

Details Positive displacement piston metering pump Positive displacement piston metering pump

1990-02-20

1991-10-22

Huppert, Michael S.

Dispensing

With discharge assistant

With discharge volume varying means

222334, 417498, 417501, 417511, 417570, B65D 8854

Patent

active

050587790

ABSTRACT:
A pneumatically operated metering pump having in a single cylinder, a driven piston and a slave piston that operates as a sliding valve for admitting fluid into the pump and drawing it into the cylinder between the two pistons so the next downward stroke of the master piston will force the fluid from the discharge port.

REFERENCES:
patent: 4484866 (1984-11-01), Runkle
patent: 4531895 (1985-07-01), Zeck
patent: 4784584 (1988-11-01), Gruett
patent: 4893738 (1990-01-01), Gelinas
patent: 4930669 (1990-06-01), Dickau et al.

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