Dispensing – Resilient wall – Supply container delivering to receiving chamber
Patent
1994-05-02
1998-09-22
Derakshani, Philippe
Dispensing
Resilient wall
Supply container delivering to receiving chamber
222209, 222494, B65D 3700
Patent
active
058102035
DESCRIPTION:
BRIEF SUMMARY
This invention relates to pressure dispensing pumps and more particularly to those pressure dispensing pumps which are capable of dispensing a predetermined amount of a fluent mass whether that mass be liquid, semi liquid, semi solid or of a gel or paste like substance.
PRIOR ART
The prior art to these types of dispensers will now be described.
U.S. Pat. 3,361,305
This patent relates to fluid dispensers and incorporates a series of one way valves and a ball outlet valve as well as a diaphragm pump arrangement. There is considerable multiplicity of parts requiring the assembly of an inlet valve into the inner wall then assembly of the ball into outlet valve at final assembly of the diaphragm onto container wall. Such devices as illustrated in U.S. Pat. No. 3,361,305 require considerable time in assembly and manufacture. The diaphragm is such that a predetermined amount of fluid cannot be dispensed accurately. Further, when placed in an "upside down" orientation, the valve arrangement is such that leakage of a low viscosity fluid would occur via outlet and ball.
U.S. Pat. No. 3,910,467
This patent relates to a dispensing device for dispensing a fluid and utilises a diaphragm which is adapted to be pushed to permit the fluid to flow and a second diaphragm to serve as a sealing device. This patent relates not so much to a pump action type arrangement, but rather is a sophisticated valve arrangement to allow a metered dose to exit through an opening. Pressure is applied to the contents of the package by squeezing or exerting pressure upon the actual tube, which forces the funnel portion to move away from a valve or spindle element whilst simultaneously forcing the diaphragm down onto the top of spindle thereby sealing the aperture. In this way a selected amount of fluid will pass out of the aperture. The construction is such that it requires two diaphragms and spindle to be assembled in the container. The pump or pressure action comes from applying pressure to the outside of the container rather than to the dispensing head.
DE 2842073
This relates to a dispensing head for an atomiser and requires a multiplicity of parts including a pressure chamber arrangement, ball valve, variety of spring means and is designed to firstly action the pump and provide a fluid inside a chamber under pressure which is then released by the pushing of a spraying nozzle which opens a further valve permitting the contents to be sprayed, presumably as a fine mist. This would not be suitable for more viscous fluids and clearly involves a very large number of parts all requiring considerable assembly time.
U.S. Pat. No. 2.414.963
This patent relates to an arrangement comprising a two chamber dispensing package, a supply chamber and a discharge chamber. However, like U.S. Pat. No. 3,910,467, it requires a pressure to be applied to the container itself in order to discharge fluid from the container. In another embodiment, the dispensing chamber is closed by means of pushing of the finger against a wall of the container, the wall of the container performing the sealing. With continued pressure the pressure applied to the contents in the discharge chamber forces the contents out of the valve. Even though upon release of finger pressure the contents of the package flow into the discharge chamber, the action of pushing the wall to close the valve will force contents away from the valve opening thus reducing the ability of a system to work effectively.
U.S. Pat. No. 3,820,689
This relates to a pump having a substantially hemispherical pressure chamber and Includes an outlet which will expose any contents contained therein to contaminants. The hemispherical pressure chamber provides no mechanical advantage and has a slower recovery rate. Further, due to its shape, the "stroke" of the pumping action produces a small vacuum, thus requiring many pumping strokes.
The arrangement of these pumps also leads to a situation most conductive to the contents proceeding back into the storage unit, due to gravity feed. This ultimately means that the pump w
REFERENCES:
patent: 2143661 (1939-01-01), Schrader
patent: 2772817 (1956-12-01), Jauch
patent: 3178072 (1965-04-01), Pickels
patent: 4478356 (1984-10-01), Roggenburg, Jr. et al.
patent: 4903867 (1990-02-01), Mettenbrink
patent: 5099885 (1992-03-01), Nilsson
Derakshani Philippe
Novapharm Research Pty. Limited
LandOfFree
Pressure dispensing pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure dispensing pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure dispensing pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1615323