Dispensing – With discharge assistant – With discharge volume varying means
Patent
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.
Castle Linval B.
Huppert Michael S.
Huson Gregory L.
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