Dispensing – With discharge assistant – With movable nozzle interconnected therewith
Patent
1998-08-17
2000-01-11
Jacyna, J. Casimer
Dispensing
With discharge assistant
With movable nozzle interconnected therewith
222287, 222309, 239333, B05B 1100
Patent
active
060126159
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a device for dispensing a product held in a container, and more specifically a precompression pump.
The present pumps generally comprise a pump body having a pump chamber, an inlet valve, an outlet valve, a piston sliding in said pump body and an actuating shaft in order to activate the pump by means of a pusher. A return spring acting on the actuating shaft and/or on the pusher, returns the pump to its rest position after each actuation.
The present precompression pumps generally comprise in addition a differential piston forming an outlet valve and sliding in the pump body or on the actuating shaft, under the effect of a precompression spring.
Such a known precompression pump is revealed in document FR-2 346 056.
These known precompression pumps, even though they operate correctly, present a certain number of drawbacks. In fact, they contain numerous parts and are therefore difficult to manufacture and complicated to assemble. Furthermore, their dimensions, in particular their height, are quite considerable, which can represent a disadvantage from the point of view of adaptability on small containers, from the point of view of stocking or from an esthetic viewpoint. Besides, they do not comprise simple means and which do not involve increased manufacturing cost, which permit adjustment of the volume of the product dose discharged each time the pump is actuated.
BRIEF SUMMARY OF THE INVENTION
The objective of the present invention is to provide an improved precompression pump, which does not present the above mentioned drawbacks.
The objective of the present invention is to embody a new precompression pump formed by fewer parts than the present pumps, and consequently less expensive to manufacture and simpler to assemble. Specifically, the objective of the present invention is to provide such a pump comprising only one single spring and not comprising an actuating shaft.
The present invention also aims to provide a new precompression pump the height of which is reduced. Specifically, the objective of the invention is to supply such a pump in which the dead volume is minimized.
Another objective of the invention is to provide such an improved precompression pump where the volume of the dose discharged with each actuation can be modified by the user, without increasing the manufacturing costs.
Consequently, the objective of the invention is a precompression pump to dispense selectively a product held in a container, said pump comprising a pump chamber having an inlet valve, a piston sliding in a first cylinder, a differential piston forming an outlet valve of said pump chamber and sliding in a second cylinder between a closing position and an opening position of the pump chamber, said pump comprising in addition a pusher having a dispensing hole, said pusher element being movable between a rest position and a pump actuating position, characterized in that the said first and second cylinders are directly formed by the first and second inner walls respectively, of said pusher, said pusher thus delimiting said pump chamber in part, and in that said pump only comprises one single spring resting on the one hand on a portion of the pusher and on the other on a portion of the differential piston, said spring acting on the one hand as return spring of the pusher toward its rest position, and on the other as precompression spring for the differential piston.
Thus, the pump according to the invention offers the advantage of eliminating in particular the actuating shaft and one of the two return and precompression springs. The height of the pump and the dead volume are therefore considerably reduced, the pump chamber and the single spring being located inside the pusher, and the number of component parts of the pump is reduced, so that its manufacturing and assembly are more economical, both from a point of view of time and from the point of view of cost.
Said piston is preferably fixed with regard to the container.
Advantageously, said pump comprises a fi
REFERENCES:
patent: Re28366 (1975-03-01), Pechstein
patent: 3216624 (1965-11-01), Corsette
patent: 4111367 (1978-09-01), Hayes
patent: 4154374 (1979-05-01), Kirk
patent: 4174056 (1979-11-01), Loeffler
patent: 4984702 (1991-01-01), Pierpont
patent: 5192006 (1993-03-01), Van Brocklin et al.
patent: 5566865 (1996-10-01), Jouillat et al.
patent: 5655688 (1997-08-01), Moore
patent: 5657930 (1997-08-01), Battegazzore
patent: 5697530 (1997-12-01), Montaner et al.
patent: 5803318 (1998-09-01), Lina
International Search Report from PCT/FR96/10895 in the French language.
International Search Report from PCT/FR96/10895 in the English language.
French Search Report "Rapport de Recherche Preliminaire" for FR 95.15320.
Brunet Michel
de Pous Olivier
Jacyna J. Casimer
Valois S.A.
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