Drive device for oscillating positive-displacement machines

F - Mech Eng,Light,Heat,Weapons – 04 – B

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F04B 35/01 (2006.01) F04B 49/12 (2006.01)

Patent

CA 2762274

The present invention relates to a drive mechanism for oscillating positive-displacement machines, such as for example diaphragm pumps, having an eccentric shaft (2) and a multiplicity m of piston rods, wherein the piston rods are connected to the eccentric shaft in such a way that a rotation of the eccentric shaft generates an oscillating linear movement of the piston rods. In order to provide a corresponding drive mechanism which eliminates or at least reduces the described disadvantages, it is proposed according to the invention that the eccentric shaft and piston rods are connected to one another by means of a sliding-block guide.

L'invention concerne un mécanisme d'entraînement pour des machines volumétriques oscillantes telles que par ex. des pompes à membrane, comportant un arbre à excentrique (2) et une pluralité (m) de tiges de piston, les tiges de piston étant reliées à l'arbre à excentrique de telle manière qu'une rotation de l'arbre à excentrique produit un mouvement linéaire oscillant des tiges de piston. L'invention vise à mettre en oeuvre un mécanisme d'entraînement correspondant évitant ou réduisant au moins les inconvénients cités. A cet effet, l'arbre à excentrique et la tige de piston sont reliées l'un à l'autre au moyen d'un guide de coulisse.

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