Active check valves in diaphragm pump with solenoid drive

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

Patent

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Details

F04B 43/02 (2006.01) F04B 13/00 (2006.01) F04B 53/10 (2006.01) F16K 15/00 (2006.01)

Patent

CA 2668624

The invention refers to a diaphragm pump (1) for use as a detergent dosage pump. The diaphragm pump (1) according to the invention comprises a pump housing (2), a working fluid chamber, at least one intake (3), at least one outlet (4) and one diaphragm (6) defining a wall of the working fluid chamber and reciprocatingly moveable, diaphragm driving means for reciprocating said diaphragm (6) and at least one check valve (7) including a spring biassed valve body (7a) for controlling ingress of the fluid into the working fluid chamber. The diaphragm pump is characterized by means for mechanically pushing the valve body (7a) into its valve seat.

L'invention concerne une pompe à membrane (1) destinée à être utilisée comme pompe de dosage de détergent. La pompe à membrane (1) de l'invention comprend un boîtier de pompe (2), une chambre de fluide de travail, au moins une entrée (3), au moins une sortie (4) et une membrane (6) définissant une paroi de la chambre de fluide de travail et se déplaçant selon un mouvement de va-et-vient, des moyens d'entraînement de membrane pour entraîner ladite membrane (6) selon un mouvement de va-et-vient et au moins un clapet de non retour (7) comprenant un corps de clapet sollicité par ressort (7a) pour réguler l'entrée du fluide dans la chambre de fluide de travail. La pompe à membrane est caractérisée en ce qu'elle comprend des moyens pour pousser mécaniquement le corps du clapet (7a) dans son siège de clapet.

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