Ejection apparatus for high-pressure ejection of a liquid

Details Ejection apparatus for high-pressure ejection of a liquid Ejection apparatus for high-pressure ejection of a liquid

A - Human Necessities

61

M

A61M 5/30 (2006.01) A61M 5/20 (2006.01)

Patent

CA 2195219

The invention concerns an apparatus for the high-pressure ejection of a liquid or a particle-containing liquid. The apparatus comprises a pressure chamber (1) which accommodates the liquid, opens into an ejection opening (2) and is delimited by a working piston (3, 8) which can be displaced by a drive in the pressure chamber (1). The drive takes the form of an impact member (4) which exerts a resilient impact on the working piston and can be accelerated such that it is driven until it strikes the working piston end remote from the pressure chamber. The impact member is not driven whilst the impact is transmitted. The volume of the pressure chamber (1) is larger than the displacement volume of the liquid displaced by the working piston (3, 8) during its power stroke.

L'invention concerne un appareil pour l'éjection haute pression d'un liquide ou d'un liquide contenant des particules. Cet appareil comporte une chambre de pression (1) qui reçoit le liquide, débouche dans un orifice d'éjection (2) et est délimitée par un piston moteur (3, 8) qui se déplace dans la chambre de pression (1) grâce à un système d'actionnement. Ce système d'actionnement se présente sous la forme d'un élément d'impact (4) qui exerce un choc élastique sur le piston moteur et peut être accéléré par poussées jusqu'à ce qu'il vienne frapper l'extrémité du piston opposée à la chambre de pression. L'élément d'impact ne subit pas de poussée lors de la transmission du choc. Le volume de la chambre de pression (1) est supérieur au volume de refoulement du liquide refoulé par le piston moteur (3, 8) lors de sa course motrice.

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