Dispensing – With filter – Associated with vent passage
Patent
1998-09-10
2000-04-25
Recla, Henry J.
Dispensing
With filter
Associated with vent passage
2223211, 2223216, 2223217, 2223219, 141285, B67D 558
Patent
active
060533684
DESCRIPTION:
BRIEF SUMMARY
The invention relates to dispensing apparatus for fluids in which air flows back to effect pressure compensation according to the preamble of claim 1.
Conventional dispensing apparatus or metering pumps for pharamaceuticals and cosmetics are known. Such dispensing apparatus are mounted on a storage vessel for the fluid which is to be dispensed. In order to prevent a partial vacuum from being created in the storage vessel when the fluid is dispensed, ambient air flows into the storage vessel. The drawback of such dispensing apparatus is that the incoming air contains germs and therefore contaminates the fluid in the storage vessel. Furthermore, the fluid becomes contaminated at the outlet as a result of contact with the surroundings. This contamination can intermingle with the stored fluid in the storage vessel during the fluid's path to the outlet and also contaminate this fluid. In the case of pharmaceuticals and cosmetics, such a contamination leads to spoiled goods and danger for the user.
For this reason, so-called "airless systems" have been developed in which pressure compensation in the storage vessel is unnecessary, i.e. ambient air does not have to flow into the storage vessel. This is achieved by a special type of storage vessel. There are storage vessels with drag pistons in which the volume of the storage vessel is reduced during dispensing of the fluid by means of a drag piston. The drawback is that only cylindrical storage vessels can be used. Furthermore, there are also double-walled storage vessels in which the stored fluid is located in a ductile inner bag and incoming ambient air is taken up for pressure compensation between a fixed outer vessel and a workable inner vessel. There are also storage vessels in which germ-free air is taken up under increased inner pressure. The drawback of all these systems is that a special receptacle is required for the dispensing apparatus. This makes the system very expensive to produce and means that it cannot be adapted to conventional storage vessels and filling systems already available. Furthermore, such a system is also very expensive so it is not possible to use it for pharmaceuticals and cosmetics in the lower price range without employing preservatives. Irrespective of the price range of the products, preservatives entail harmful effects for the consumer. They are dubious substances and lead to undesireable side effects.
The object underlying the invention is to provide an apparatus of the type mentioned above for the repeated dispensing of fluids from a store with pressure compensation being obtained by means of air which protects the stored fluid from being contaminated with germs and thus renders the use of preservatives unnecessary.
A further object of the present invention is to provide a dispensing apparatus for fluids which can be adapted to conventional storage vessels and which can be produced at reasonable costs.
This object is achieved by the features claimed in claim 1.
Further embodiments are revealed by the subclaims.
The present invention uses a fluid dispensing apparatus in which the path of the fluid to the outlet is guided, at least in one part, separately from the air inlet path for the air which is intended to reach the supply vessel for pressure compensation. In this way, the air-borne germs and fluid germs can be made ineffective separately from one another. This has the advantage that different methods can be used for degerminating the fluid and the air, each of which methods can be adapted to the different needs. The degermination of or the reduction in germs in the fluid occurs in the region of the fluid's outward path by means of oligodynamically effective substances. Heavy metals and/or heavy metal alloys in metallic and/or ionic form can be used. The use of silver has proven particularly favourable. The degermination or reduction of germs in the fluid in the area of the fluid's path to the outlet has the effect that no germs from the outlet coming into contact with the surroundings can pass past the valve against the f
REFERENCES:
patent: 3333741 (1967-08-01), Radcliffe
patent: 4054139 (1977-10-01), Crossley
patent: 4694976 (1987-09-01), Schuetz
patent: 4722731 (1988-02-01), Vailancourt
patent: 4973320 (1990-11-01), Brenner et al.
patent: 5154325 (1992-10-01), Ryder et al.
patent: 5232687 (1993-08-01), Geimer
patent: 5927559 (1999-07-01), Bommer et al.
Huynh Khoa
Recla Henry J.
Ursatec Verpackung-GmbH
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