Dispensing – Resilient wall – Supply container delivering to receiving chamber
Patent
1988-07-05
1989-09-05
Croyle, Carlton R.
Dispensing
Resilient wall
Supply container delivering to receiving chamber
222211, 222212, 222383, 417472, 417480, F04B 4308
Patent
active
048630705
ABSTRACT:
A metering pump for discharging metered quantities of liquid and/or low viscosity materials, in particular pasty materials, on bottle-type or can-type containers has a bellows sealed between two coaxial housing parts of dimensionally stable plastic. The housing parts are telescopically movable relative to one another, and provided at each of its two ends with respective inlet and outlet pump valves. Each pump valve has an axially mobile closing element. On its discharge end, the bellows has an integrally molded annular valve seat face, provided with a passage orifice, for a spring-loaded closing element. A bellows seal includes an annular wall surface disposed against a pipe attachment which is integrally molded to a first housing part. The first housing part is provided with a discharge spout and is supported at its end face on an annular shoulder of the bellows. The closing element of the pump inlet valve can initially be integrally injection-molded to the second housing part and severed from the latter during assembly and be brought, by axial displacement into the bellows, into a functionally appropriate position on an annular valve seat face of the bellows.
REFERENCES:
patent: 2824672 (1958-02-01), Wersching
patent: 3452905 (1969-07-01), Micallef
patent: 4088425 (1978-05-01), Bennett
patent: 4732549 (1988-03-01), Schuckmann
Croyle Carlton R.
Scheuermann D.
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