Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Reexamination Certificate
1999-09-13
2001-04-24
Weiss, John G. (Department: 3761)
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
C604S181000, C604S228000, C604S403000
Reexamination Certificate
active
06221054
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a fluid product dispensing device consisting of two components, i.e. that enables two different products to be dispensed.
“Different” products can either refer to products with different compositions or different concentrations of the same product.
2. Related Art
There are many examples, particularly when treating certain illnesses, where the utilization of a single product is not sufficient or does not provide satisfactory results for the treatment concerned. In order to improve the treatment it is often necessary to combine two different products or two different concentrations of the same product, meaning that the user must have two product dispensers available. This has a number of drawbacks, for instance the utilization of several dispensers increases the cost of the treatment. Also, when two different products are utilized, one must generally be dispensed before the other. There is a risk of confusion or error concerning which dispenser is chosen by the user and which could result in a lack of efficiency in the treatment should the products be interchanged and/or should the order in which the two different products are dispensed become confused. Moreover, the utilization of two dispensers is not user friendly and requires extra space that can also be problematic.
SUMMARY OF THE INVENTION
The present invention aims to avoid the above-mentioned drawbacks.
In particular, the present invention aims to provide a single fluid product dispensing device that enables two different fluids to be dispensed from the same dispenser.
The present invention also aims to provide a fluid product dispenser of this kind that enables treatment to be achieved that is as efficient as possible at a cost that is as low as possible.
Another aim of the present invention is to provide a fluid product dispenser of this kind that avoids the risk of confusing two products to be dispensed, thus improving safety for the user.
Therefore, the present invention relates to a fluid product dispenser device that comprises a dispensing component such as a pump mounted on a recipient, and an actuating component such as a push button to dispense the product, the device comprising two product chambers fitted such that they are emptied successively, the product contained in the second chamber only being dispensed once the first chamber is empty, the first chamber being fastened to the body of the dispensing component or to a support part of said body and extending to the bottom of the recipient at least partly inside the second chamber.
Preferably, the first chamber is connected to the dispensing component and the second chamber is connected to said first chamber by a sealing part that prevents the product contained in the second chamber from flowing towards the dispensing component for as long as the first chamber still contains any product, and that releases said flow when said first chamber is empty such that when the device is subsequently actuated, the product that is contained in the second chamber is dispensed.
Advantageously, the first chamber is connected to the dispensing component on one side and comprises a connecting channel to the second chamber on the other side,. said first chamber comprising a follow-through piston that is displaced while remaining leaktight in said first chamber each time the device is actuated to compensate for the volume that is dispensed each time the device is actuated, the displacement of said follow-through piston simultaneously drawing in product from the second chamber in the upstream section of the first chamber located behind said follow-through piston in the direction of flow of the product, and when said follow-through piston has reached the end position in which the first chamber is empty, said follow-through piston operates in conjunction with means of passage to create a passage between said upstream section of the first chamber and the dispensing component, thus enabling the product drawn in said upstream section of the first chamber and/or the product remaining in the second chamber to be dispensed.
Advantageously, said means of passage are constituted by one or more grooves provided at the downstream end of the lateral surface of the first chamber.
The first chamber is fastened to the body of the dispensing component or to a support part of the body and extends to the bottom of the recipient at least partly inside the second chamber.
Advantageously, said first chamber is constructed as part of the body of the dispensing component or with the support part of said body.
REFERENCES:
patent: 4715854 (1987-12-01), Vaillancourt
patent: 5383864 (1995-01-01), Van Den Heuvel
patent: 5518005 (1996-05-01), Brannon
patent: 5637100 (1997-06-01), Sudo
patent: 5716339 (1998-02-01), Tanaka et al.
patent: 6050957 (2000-04-01), Desch
patent: 6059755 (2000-05-01), Michel
patent: 94 03 512 (1994-06-01), None
Arghyris Laurent
Martin Claude-Georges
Cho David J.
Sughrue Mion Zinn Macpeak & Seas, PLLC
Valois S.A.
Weiss John G.
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