Pump dispenser having moveable outlet check valve element

Details Pump dispenser having moveable outlet check valve element Pump dispenser having moveable outlet check valve element

1995-11-03

1997-11-18

Huson, Gregory L.

Dispensing

Processes of dispensing

222375, 2223831, 222571, 239333, B67B 700

Patent

active

056878770

ABSTRACT:
A tulip-type check valve is housed in a cylindrical chamber, the length of which is greater than the check valve itself so that during the pressure stroke of the pump, the valve moves forward in its chamber and flexes to permit flow about its periphery. During the suction stroke, the valve closes and is drawn backward upstream in its chamber and there is a sucking back of liquid between the check valve and the orifice to obviate nozzle the drip.

REFERENCES:
patent: 3843030 (1974-10-01), Micallef
patent: 3995774 (1976-12-01), Cooprider
patent: 4138038 (1979-02-01), Grogan
patent: 4155487 (1979-05-01), Blake
patent: 4161288 (1979-07-01), McKinney
patent: 4204614 (1980-05-01), Reeve
patent: 4227650 (1980-10-01), McKinney
patent: 4527594 (1985-07-01), Garneau
patent: 4527741 (1985-07-01), Garneau
patent: 4669664 (1987-06-01), Garneau
patent: 4739904 (1988-04-01), Spencer et al.
patent: 5181658 (1993-01-01), Behar
patent: 5549223 (1996-08-01), Hori

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