Dispensing – Collapsible wall-type container – With casing or support
Patent
1997-05-29
2000-02-08
Kaufman, Joseph A.
Dispensing
Collapsible wall-type container
With casing or support
222205, 2223217, B65D 3556
Patent
active
060219246
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION
The invention relates to a manually controlled metering pump for bottles with deformable sheaths.
Certain liquid or pasty products, particularly medications, are offered in bottles and must not be exposed to the air to keep their cleanliness or to avoid degradation. The bottles which contain them must thus have a deformable sheath, so that the volume of this sheath always corresponds to the volume of the liquid present in the bottle.
To dispense the liquid, it is known to use a screwed push button which is raised, then return it to place. It is also known to use a manually controlled pump having at its lower part an inlet ball valve and at its upper part an outlet ball valve. The pumps of this type operate correctly when maintained strictly upright.
If the bottle is on its side or inclined, the balls have the tendency to leave their conical seat and the pump does not ensure satisfactory sealing of the bottle.
There is also known from Patent Abstract of Japan, Vol. 13, No. 265, of Jun. 19, 1989 and JP-1-66,475, a metering pump adapted for very viscous fluids, comprising a metering chamber between a lower valve and an upper valve, a push button returned by a spring and a spout communicating with the metering chamber via the central channel.
The present invention has for its object to provide a pump ensuring sealing of the bottle no matter what its position.
The invention has for an object a manually controlled metering pump for a bottle with a deformable sheath, comprising a metering chamber comprised between a lower valve and an upper valve, a push button returned by a spring and a spout communicating with the metering chamber via a central channel, the upper valve being carried by a disc constituting the base of a hollow rod secured to the push button, and bearing from below on a hollow piston adapted to be driven by the push button, and sliding in the metering chamber, characterized in that the lower valve is flexible, of truncated conical shape and is maintained on the bottom of the pump by a key, in that the hollow piston has a constriction on which comes to bear a central tube carried by the push button and in that the hollow rod is enlarged below the restriction, an O-ring seal being disposed between the enlargement of the hollow rod and the constriction.
According to other characteristics of the invention: chamber. maintained from below by the edge of the disk constituting the base of the hollow rod; the pump.
BRIEF DESCRIPTION OF THE DRAWINGS
Other characteristics will appear from the description which follows with reference to the accompanying drawing, on which can be seen:
FIG. 1--a cross-sectional view of a bottle with a deformable sheath provided with a pump according to the invention;
FIG. 2--a cross-sectional view of the pump of FIG. 1 at the end of pumping for expelling liquid.
FIG. 3--a cross-sectional view of a modified embodiment of a model with a deformable sheath provided with a pump according to the invention.
FIG. 4--a cross-sectional view of the pump of FIG. 3 in the course of pumping.
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, the bottle provided with the pump according to the invention comprises a rigid external sheath 1 and a deformable internal sheath 2 disposed within the rigid sheath 1. The neck 3 of the deformable envelope 2 is disposed on the neck 4 of the rigid sheath 1. A metering pump 5 is provided on the sheaths 1 and 2 of the bottle with the interposition of a neck joint 6. A protective cap 7 is disposed on the pump 5.
The pump 5 comprises a body 8 having an external cylindrical skirt 9 adapted to have snap fitting with the exterior of the rigid sheath 1 of the bottle, and intermediate skirt 10 being applied to the interior of the deformable internal sheath 2 of the bottle, and an internal skirt 11. The three coaxial skirts are carried by a flat ring 12 which bears on the neck joint 6 to compress it to ensure sealing between the interior of the deformable sheath 2 and the exterior of the bottle.
Below the
REFERENCES:
patent: 3502035 (1970-03-01), Fedit et al.
patent: 3949910 (1976-04-01), Focht
patent: 5360145 (1994-11-01), Gueret
patent: 5630531 (1997-05-01), Gaucher
Bret Pierre
Pozzi Jacques
Suck Catherine
Kaufman Joseph A.
Societe de Promotion Recherche et Innovation Technologique
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