Fluid delivery system
First Claim
Patent Images
1. A dispensing device for dispensing flowable materials comprising:
- a two-part housing including a region defining a discharge nozzle, through which flowable material can pass;
support means for receiving a sachet which is initially filled with material to be dispensed, the support means serving to position the sachet relative to the discharge nozzle defining region and retain the sachet in position so that flowable material leaving the sachet exits through the discharge nozzle defining region;
means for pressurizing the contents of the sachet situated within the support means at least when discharge of material therefrom is required; and
valve means for controlling the flow of material through the nozzle defining region;
the housing being openable for insertion of a flexible sachet of flowable material, and the pressurizing means comprising a self roll-up spring which in use exerts a force on the sachet to expel material therefrom through the valve means, which prevents exit of material except when it is opened;
wherein the roll-up spring is initially unrolled and expels material through the opened nozzle as it rolls up, the sachet being progressively rolled up with the spring, and wherein the two-part housing is provided with means for relatively displacing the two parts thereof in the direction in which the spring rolls up and unrolls, whereby displacing one part relative to the other opens the housing for sachet replacement and automatically unrolls the spring so that it will pressurize a replacement sachet when the housing is subsequently closed.
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Accused Products
Abstract
Delivery apparatus for a flowable material such as toothpaste wherein a two part container is employed, thereby to form a dispenser of which one part is replaceable to renew the contents. A preferred embodiment is a sachet (450) progressively rolled up with a roll-up spring (Tensator) within a housing (418, 426) which is openable to enable the sachet to be replaced.
95 Citations
17 Claims
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1. A dispensing device for dispensing flowable materials comprising:
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a two-part housing including a region defining a discharge nozzle, through which flowable material can pass; support means for receiving a sachet which is initially filled with material to be dispensed, the support means serving to position the sachet relative to the discharge nozzle defining region and retain the sachet in position so that flowable material leaving the sachet exits through the discharge nozzle defining region; means for pressurizing the contents of the sachet situated within the support means at least when discharge of material therefrom is required; and valve means for controlling the flow of material through the nozzle defining region; the housing being openable for insertion of a flexible sachet of flowable material, and the pressurizing means comprising a self roll-up spring which in use exerts a force on the sachet to expel material therefrom through the valve means, which prevents exit of material except when it is opened; wherein the roll-up spring is initially unrolled and expels material through the opened nozzle as it rolls up, the sachet being progressively rolled up with the spring, and wherein the two-part housing is provided with means for relatively displacing the two parts thereof in the direction in which the spring rolls up and unrolls, whereby displacing one part relative to the other opens the housing for sachet replacement and automatically unrolls the spring so that it will pressurize a replacement sachet when the housing is subsequently closed. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A fluid delivery system comprising:
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(a) housing means (b) a variable volume reservoir located therein (c) valve means for controlling the flow of a fluid contained within the reservoir through an outlet nozzle, (d) roll-up spring means within the housing means acting on the reservoir to pressurize the contents thereof so that when the valve means is opened the contents are forced therethrough, wherein the reservoir comprises a sachet acted on by the roll-up spring means, the housing means including retraction means for retracting the spring means to permit the insertion of a filled sachet and further including means for releasing the retraction means to enable the spring means to curl up and pressurize the sachet, and wherein the housing includes sachet retaining means remote from a curled up end of the roll-up spring means together with means for piercing the sachet and providing a fluid exit therefrom leading to said valve means and said outlet nozzle. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification