Disposable pump for dispensing small metered amounts of liquid f

Details Disposable pump for dispensing small metered amounts of liquid f Disposable pump for dispensing small metered amounts of liquid f

1981-02-24

1982-12-21

Smith, Leonard E.

Pumps

Expansible chamber type

Pumping member position controlled port

222181, F04B 3910, B67D 300

Patent

active

043647189

ABSTRACT:
A disposable pump of plastics material for dispensing small metered amounts of liquid from a single opening container to which it has been attached and which can be closed thereby, comprises a one piece housing and a cylindrical piston; the housing has gas inlet means for allowing gas to enter the container if any subatmospheric pressure should occur therein. A control unit for operating this pump comprises a programme for imparting a certain succession of rotative and sliding movements to the piston of said pump.

REFERENCES:
patent: 922453 (1909-05-01), Burgner
patent: 1553113 (1925-08-01), Rutt
patent: 1790228 (1931-01-01), Chambers
patent: 2605021 (1952-07-01), Churchill et al.
patent: 2702510 (1955-02-01), Dourte
patent: 3022742 (1962-02-01), Bowen, Jr.
patent: 3200994 (1965-08-01), Levinson et al.
patent: 3250438 (1966-05-01), Packwood, Jr.
patent: 3550648 (1970-12-01), Tabor et al.
patent: 3809293 (1974-05-01), Chappell

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