Dispensing – With discharge assistant – With movable nozzle interconnected therewith
Patent
1996-08-14
1999-03-16
Bomberg, Kenneth
Dispensing
With discharge assistant
With movable nozzle interconnected therewith
2223219, 222336, B67D 542
Patent
active
058819274
ABSTRACT:
In a pump mechanism attached to a container to fill a liquid and eject the liquid from the container, the pump mechanism includes: a cylinder having a liquid introduction port; a piston which is displaceable in the cylinder; an ejection guide path for the liquid, the path being communicated with the space in the cylinder, the liquid stored in the cylinder being ejected via the ejection guide path by a pushing force which causes the piston to be displaced from the original position to a displaced position; and a recovery device for restoring the piston from the displaced position to the original position by a gas pressure and storing the liquid in the cylinder when the pushing force is released. The pushing force causes the space in the piston to enter a substantially vacuum state, and the gas pressure is generated by a pressure difference between the internal pressure of the space and atmospheric pressure acting via the liquid on the piston. With the pump mechanism, when it is to be subjected to a disposal process or a recycle process, it is not required to conduct selection according to the material and which can be therefore subjected to such a process at a low cost.
REFERENCES:
patent: 3561644 (1971-02-01), Works et al.
patent: 4452379 (1984-06-01), Bundschuh
patent: 5267673 (1993-12-01), Crosnier et al.
patent: 5316198 (1994-05-01), Fuchs et al.
patent: 5363993 (1994-11-01), Mascitelli et al.
patent: 5518147 (1996-05-01), Peterson et al.
patent: 5673824 (1997-10-01), Evans
patent: 5704519 (1998-01-01), Crosnier et al.
Bomberg Kenneth
Kao Corporation
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