Dispensing – With discharge assistant – With discharge volume varying means
Patent
1995-08-15
1997-11-11
Kaufman, Joseph
Dispensing
With discharge assistant
With discharge volume varying means
222307, 2224022, 239350, G01F 1106
Patent
active
056854633
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a nozzle for use with pressurized containers, or dispensers, having a combined facility for the dosing and spraying of gas or liquid in aerosol form.
Products contained in pressurized containers are difficult to dose in small amounts and are hence difficult to direct or position with any degree of accuracy in, for example, the lubrication of precision-made mechanical components. Devices intended solely for discharge of a product from the container in the form of discrete doses are already known. The purpose of the present invention is to combine this function with a function permitting both stepless adjustment of the product flow and discharge of the product in the form of an aerosol spray.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the invention are shown schematically in the drawings appended hereto, in which:
FIG. 1 shows the basic design of the invention, which may be modified as shown in FIGS. 4 to 6b.
FIG. 2 shows a version of the invention having an enlarged intermediary chamber.
FIG. 3 shows a version of the invention having an enlarged, adjustable intermediary chamber.
FIG. 4 shows a version of the invention having a closable cap.
FIG. 5a shows a version of the invention having an adjustable stop.
FIG. 5b is a top view of the embodiment shown in FIG. 5a, with the adjustable stop 7 in a different position;
FIG. 6a shows a version of the invention having the push-button in an alternative peripheral position.
FIG. 6b is a top view of the embodiment shown in FIG. 6a.
DETAILED DESCRIPTION
The invention, which interacts with the discharge valve and delivery outlet 3 of the pressurized container, enables a gas or aerosol to be discharged in doses of the desired amount either by throttling the flow of liquid or by the use of an intermediary chamber, which may be either fixed or adjustable in volume. Such functions are achieved by providing the nozzle 10 with a push-button 1 which may be operated as desired and which, when pushed, activates a valve cone (mechanism) 2 seated in or by the opening of the delivery outlet 3, which is itself adjustable such that the opening may be adjusted to any setting between completely open and completely closed. The push-button may be pre-set by means of an adjustable stop 7 (FIGS. 5a and 5b) or may be protected against unintentional pressure either by its position (FIGS. 6a and 6b) or by shielding it under a closable cap (FIG. 4, 6).
For delivery of the product in discrete doses, the nozzle uses the delivery outlet 3 as an intermediary chamber 4; the capacity of the delivery outlet 3 is about one drop of liquid plus propellant (FIG. 1). Variants of the invention may comprise a capacity 9 of enlarged volume, which may be fixed in size (FIG. 2) or be adjustable by means of a set screw 5 or similar device (FIG. 3), which cavity 9 is located in a cavity or hollow section of the nozzle 10 and communicates with the opening of the delivery outlet 3 and the valve mechanism 2 activated by the push-button. Containers without a delivery outlet 3 may be fitted with an adapter.
For stepless adjustment of a continuous or intermittent flow of product, pressure is applied to the push-button 1 such as to produce the desired degree of throttling, at the same time that pressure is applied to the nozzle 10, bringing the delivery outlet 3 into an inserted position and opening the valve of the container. For spraying, no pressure is applied to the push-button 1 and the product is given free passage. For discharge of the product in discrete doses, pressure is applied to the push-button 1 such as to close the opening fully, and at the same time as pressure is applied to the nozzle 10, bringing the delivery outlet 3 into an inserted position and opening the valve of the container and filling the intermediary chamber 4 under pressure. The product contained in the intermediary chamber 4 is released and flows out of the nozzle 10 as the pressure on the push-button 1 is released and after the valve of the container has closed. T
REFERENCES:
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patent: 4220258 (1980-09-01), Gruenewald
patent: 5085351 (1992-02-01), Martin
patent: 5183187 (1993-02-01), Martin et al.
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