Dispensing – With discharge assistant – With movable nozzle interconnected therewith
Patent
1997-03-10
1998-12-08
Bomberg, Kenneth
Dispensing
With discharge assistant
With movable nozzle interconnected therewith
222385, B67D 540
Patent
active
058458190
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a method and to a device for fixing a metering member in a receptacle containing a substance to be dispensed, and it applies more particularly to dispensers for dispensing small quantities, such as samples of perfume, cosmetics, or pharmaceuticals.
It is known, e.g. from documents EP-0 408 421 and EP-0 583 193, to use a ring for mounting the pump body on the receptacle. That system suffers from certain drawbacks and in particular it requires a mounting operation that is relatively expensive given the nature of the receptacles (samples).
Another known system, disclosed in U.S. Pat. No. 5,271,532, avoids that drawback by providing a pump body that is dimensioned so as to be capable of being inserted as a force-fit in the receptacle. Under such circumstances, there is no need for a ring. To ensure that the pump is put into place properly, its body includes a bottom portion whose outside diameter is smaller than the diameter of the neck of the receptacle. Clamping takes place at the neck which receives the top portion of the pump body as a force-fit, which portion must have an outside diameter that is slightly greater than the diameter of said neck. That device also suffers from drawbacks. Thus, since clamping is provided by the pump body itself, its dimensions and in particular its outside diameter need to be very accurate, and that gives rise to extra manufacturing costs. Also, said pump body must be of complex outside shape with different outside diameters. Further, the diameters of the necks of receptacles, and in particular receptacles made of glass, can vary slightly from manufacture and that can prevent the pump body being fixed properly in said neck of the receptacle. Also, engaging the pump body itself as a force-fit can in some cases cause the pump body to be constricted, giving rise to friction inside the pump that can spoil its operation.
Another device, disclosed in document DE-31 22 982, provides for the pump body to be snap-fastened to a rim on the neck of the receptacle. That device suffers from the drawback of requiring the receptacle to have a special neck and it is not adaptable to a standard neck.
SUMMARY OF THE INVENTION
An object of the present invention is to avoid the above-mentioned drawbacks by providing a fixing device that is simple and cheap, enabling the body of a metering member to be fixed in the neck of a receptacle, it being possible for the radial dimensions of the body of the metering member and of the neck of the receptacle to vary slightly without influencing the possibility and/or the quality of fixing.
The present invention thus provides a fixing device for fixing a metering member including a cylindrical body whose top portion is terminated by a flange in a cylindrical neck of a receptacle containing a substance to be dispensed, the device being characterized in that said body of the metering member has an outside diameter that is slightly smaller than the inside diameter of said cylindrical neck of the receptacle and comes into abutment on the top end of said neck of the receptacle via said flange, said device comprising a cylindrical ferrule whose outside diameter is slightly greater than the inside diameter of said body of the metering member over at least a portion of its length, said ferrule being engaged by force in said body of the metering member at the neck of the receptacle.
The device of the invention presents numerous advantages: the pump body may be of very simple general configuration, no longer requiring an outside shape that is complex and of dimensions that are very accurate. Manufacturing cost is thus reduced. Also, the invention is adaptable to standard necks and does not require any special additional structure. Finally, the pump body is fixed directly in the neck, thereby avoiding the use of a screwed or crimped ring.
Preferably, said body of the metering member includes at its top end a portion of slightly greater inside diameter so as to enable the ferrule to be pre-engaged prior to
REFERENCES:
patent: 3257961 (1966-06-01), Schlenker
patent: 3500760 (1970-03-01), Schlenker
patent: 4899913 (1990-02-01), Ruscitti et al.
patent: 5271532 (1993-12-01), Jumel et al.
patent: 5277340 (1994-01-01), Van Brocklin
Bomberg Kenneth
Valois S.A.
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