Pressure-compensated liquid dispenser

A - Human Necessities – 47 – K

Patent

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Details

A47K 5/12 (2006.01)

Patent

CA 2355739

An automatic soap dispenser (10) includes a disposable soap container including a dispensing mechanism (20) in which walls of an interior chamber (56) cooperate with a diaphragm (62) and a plunger (66) to form a transit chamber (64), which is resiliently expandable against the force of a spring (80). When a solenoid (58) permits the diaphragm (62) to move away from the outlet of a passage (50) in a flow path from the interior of a pressurized reservoir (18) to the expandable transit chamber (64), travel of the plunger (66) permits the transit chamber (64)'s pressure-relieving outlet opening to expand so that the pressure within the transit chamber (64) is determined predominantly by the force of the spring (80) rather than by the pressure within the reservoir (18). The velocity of the liquid dispensed from the transit chamber (64) through the dispensing mechanism's spout (16) is therefore relatively independent of the pressure within the reservoir (18).

La présente invention concerne un distributeur de savon automatique (10) comportant un contenant de savon jetable pourvu d'un mécanisme de distribution, (20) dans lequel les parois d'une enceinte interne (56) coopèrent avec un diaphragme (62) et un piston (66) pour former une enceinte de transit (64), pouvant se déployer de manière résiliente pour s'opposer à la force d'un ressort (80). Lorsqu'un solénoïdale (58) permet au diaphragme (62) de s'écarter de la sortie d'un passage (50) dans un trajet fluide allant de l'intérieur d'un réservoir sous pression (18) jusqu'à l'enceinte de transit déployable (64), le trajet du piston (66) permet à l'ouverture de sortie de décharge de la chambre de transit (64) de se déployer pour que la pression de la chambre de transit (64) soit essentiellement déterminée par la force du ressort (80) plutôt que par la pression du réservoir (18). La vitesse du liquide distribué de l'enceinte de transit (64) via le goulot verseur du mécanisme de distribution (16) est par conséquent relativement indépendante de la pression du réservoir (18).

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