Pump mechanism for ejecting liquid

Details Pump mechanism for ejecting liquid Pump mechanism for ejecting liquid

1997-11-12

1999-04-20

Derakshani, Philippe

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

2223216, 2223219, G01F 1130

Patent

active

058949631

ABSTRACT:
In a pump mechanism for ejecting liquid, an upper inside wall of a bell-shaped portion which is formed around a lower end of a first piston constitutes a guide surface inclined upward toward an axial hole of the first piston. The guide surface serves to prevent entrapping of air underneath the upper inside wall of the bell-shaped portion, or in an upper part of a metering chamber and stabilize the amount of liquid measured in each successive spraying action.

REFERENCES:
patent: 4762475 (1988-08-01), Fuchs
patent: 5105994 (1992-04-01), Jouillat et al.

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