Dripless dispenser for liquids and viscous fluids

Details Dripless dispenser for liquids and viscous fluids Dripless dispenser for liquids and viscous fluids

1985-08-02

1987-07-07

Rolla, Joseph J.

Dispensing

With discharge assistant

Container with follower

222571, 604228, 604229, B67D 500

Patent

active

046781072

ABSTRACT:
A dispenser for liquids and viscous fluids has a syringe-like device with a barrel for containing fluid and a nozzle at one end. The plunger is movable axially in the barrel for discharging the fluid. At the inner end of the plunger is a flexible, elastic cap which has an end wall that is normally concave, but which is flattened out under pressure when the fluid is discharged. When pressure on the cap is removed, the cap reassumes its concave shape thereby creating a suction in the barrel which draws fluid back into the nozzle to prevent dripping.

REFERENCES:
patent: 2923442 (1960-02-01), Maras
patent: 2955728 (1960-10-01), Macklanburg
patent: 3029985 (1962-04-01), Krueger et al.
patent: 3174655 (1965-03-01), Hurschman
patent: 3250443 (1966-05-01), Abbott
patent: 3253592 (1966-05-01), Von Pechmann
patent: 3595449 (1971-07-01), Stump et al.
patent: 4500310 (1985-02-01), Christinger

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