Dispensing – Collapsible wall-type container – Plural container and/or compartment
Patent
1994-05-25
1996-09-03
Kashnikow, Andres
Dispensing
Collapsible wall-type container
Plural container and/or compartment
222 95, 222105, 222137, 2221851, 222389, 277178, B65D 3522
Patent
active
055516017
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a dispenser for dispensing one or more components.
BACKGROUND OF THE INVENTION
Dispensers for dispensing one or more components are known and are made in a variety of different sizes. Conventional methods of expelling material from a twenty liter dispenser comprise pressurising the air space above the component in the dispenser. Usually a piston is inserted between the pressurised air and the component to be dispensed to prevent cavitation and loss of efficiency of expulsion. However, it is common for the pressurised air to still leak past the piston which is undesirable. Our copending Australian patent application 56206/90 discloses the use of an air bag to contain pressurised air, together with the use of a central rod to prevent bowing of the ends of the container. Whilst the invention disclosed in that application does provide adequate dispensing of components we have found that in some instances the bags burst unless prohibitably expensive materials are used. This bursting can be exacerbated because of the need of the air bag to wrap around the center rod which causes localized stresses.
The object of this invention is to overcome this problem.
SUMMARY OF THE INVENTION
The invention in a first aspect may be said to reside in a dispenser for dispensing a component, comprising: container, the container having a first abutment portion; abutment against said first abutment portion of the container; diaphragm and for sandwiching the abutment section of the diaphragm between the first abutment portion of the container and the second abutment member; the diaphragm; and space in the container and wherein compressed fluid is supplied to the enclosed volume to cause the diaphragm to extend or expand to thereby dispense the component from the dispenser.
In the specification and in the claims the term "compressed fluid" should be taken to mean compressed gas as well as liquid under pressure.
Since the invention utilizes a diaphragm which is arranged in folded or collapsed fashion in the space and is retained between the first abutment portion of the container and a second abutment portion, the diaphragm easily expands to expel the component from the dispenser without bursting.
Preferably the first abutment portion of the container comprises an upper rim of the container and preferably the second abutment portion comprises a rim portion of a lid of the container, and preferably the abutment section of the diaphragm comprises a peripheral edge portion of the diaphragm which is sandwiched between the rim of the container and the rim of the lid when the lid is located on the container.
Preferably the closing means comprises the lid of the container and the diaphragm has a side wall and a base, the enclosed volume being defined between the diaphragm and the lid of the container.
Preferably a piston is disposed between the diaphragm and the component in the container.
Preferably the diaphragm has an attachment portion which is connected to the piston and the enclosed volume is defined between the lid of the container, the diaphragm and the piston.
In another embodiment of the invention the container includes a channel and a wall of the channel forms the first abutment portion of the container, the second abutment member being a ring which is received in the channel for sandwiching the abutment section of the diaphragm between the wall of the channel and the ring.
Preferably the container includes a reinforcing rod which extends between an upper portion of the container and a lower portion of the container, said diaphragm including an opening for receiving said rod and a seal member for sealing the diaphragm to the rod.
Preferably the seal member is movable longitudinally along the rod as the diaphragm moves to dispense material from the container.
Preferably the seal member comprises a strengthening ring, such as a washer, having a hole, which surrounds the opening in the diaphragm through which the rod passes, the diaphragm having a peripheral portion surrounding
REFERENCES:
patent: 1661521 (1928-03-01), Zimmerman
patent: 1924829 (1933-08-01), Bacher
patent: 2097612 (1937-11-01), Arnold
patent: 2105160 (1938-01-01), Piqueres
patent: 2649995 (1953-08-01), Muskin
patent: 2708600 (1955-05-01), Froidevaux
patent: 2728494 (1955-12-01), Hobson
patent: 2738227 (1956-03-01), Havens
patent: 2991916 (1961-07-01), Kish
patent: 3186597 (1965-06-01), Henderson
patent: 3847308 (1974-11-01), Tambor
patent: 4085865 (1978-04-01), Thompson et al.
patent: 4113151 (1978-09-01), Brown et al.
patent: 4154377 (1979-05-01), Adams
patent: 4213545 (1980-07-01), Thompson et al.
patent: 4419096 (1983-12-01), Leeper et al.
patent: 4585150 (1986-04-01), Beacham et al.
patent: 4671386 (1987-06-01), Orlitzky
patent: 4690306 (1987-09-01), Stahel
patent: 4744442 (1988-05-01), Bras et al.
patent: 4801046 (1989-01-01), Miczka
patent: 5056801 (1991-10-01), Beadle
patent: 5060826 (1991-10-01), Coleman
patent: 5150820 (1992-09-01), McGill
patent: 5305929 (1994-04-01), Camm et al.
Camm James O.
Camm Stephen J.
Kashnikow Andres
Kaufman Joseph A.
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