Pump dispenser having inlet and outlet ports which are held clos

Details Pump dispenser having inlet and outlet ports which are held clos Pump dispenser having inlet and outlet ports which are held clos

1990-09-04

1992-01-28

Huppert, Michael S.

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

222341, 222385, 2224005, 2224022, B65D 8364

Patent

active

050836820

ABSTRACT:
An atomizing fluid dispenser has a pump chamber defined by a hollow vertical region defined by adjacent portions of interconnected upper and lower cylinders, a vertical member and a piston. The chamber has a first fluid entry port and a second fluid discharge port. The second port is opened and the first port is closed during a downstroke and the first port is opened and the second port is closed during an upstroke. Both ports are closed during periods of non use.

REFERENCES:
patent: 4025046 (1977-05-01), Boris
patent: 4051983 (1977-10-01), Anderson
patent: 4089442 (1978-05-01), Hafele et al.
patent: 4274560 (1981-06-01), Cater
patent: 4941595 (1990-07-01), Montaner et al.
patent: 5016780 (1991-05-01), Moretti
patent: 5020696 (1991-06-01), Cater

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