SUCTION PUMP FOR A DISPENSER UNIT AND DISPENSER UNIT
First Claim
1. A suction pump, in particular constructed as a bellows pump, for a dispenser unit for the delivery in paste, foam or liquid form of a medium, in particular for the delivery of a liquid soap, a skin protection cream or another liquid cleansing or care product for the skin, with a fastening means for the sealed fastening of the suction pump on a storage container for the liquid medium and with a pumping chamber having an elastic wall able to be compressed elastically as a result of a pumping force in a pumping direction, which is fluidically connected directly or indirectly on the one hand with intercalation of an outlet valve with a delivery means for the delivery of a defined quantity of the medium and on the other hand is able to be fluidically connected directly or indirectly with intercalation of an inlet valve with the storage container comprising guide means which are arranged such that they are able to eliminate a migration of the elastic wall of the pumping body transversely to the pumping direction during the compression of the pumping body.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a method for filling and evacuating a dispenser unit for paste-like, foam-form or liquid media. In the known methods, a storage container is evacuated via a suction pump, which otherwise serves for the delivery of the medium, after filling. The risk exists hereby that medium is drawn in. In order to make the drawing-off process more effective and more reliable, a method and a filling insert for a dispenser unit are proposed according to the invention, wherein at least one air duct is provided parallel to the suction pump. The evacuation takes place by the application of a pressure difference between storage container and the environment, which is just so great that air can in fact be drawn through the air duct but no viscous medium can be drawn.
31 Citations
26 Claims
- 1. A suction pump, in particular constructed as a bellows pump, for a dispenser unit for the delivery in paste, foam or liquid form of a medium, in particular for the delivery of a liquid soap, a skin protection cream or another liquid cleansing or care product for the skin, with a fastening means for the sealed fastening of the suction pump on a storage container for the liquid medium and with a pumping chamber having an elastic wall able to be compressed elastically as a result of a pumping force in a pumping direction, which is fluidically connected directly or indirectly on the one hand with intercalation of an outlet valve with a delivery means for the delivery of a defined quantity of the medium and on the other hand is able to be fluidically connected directly or indirectly with intercalation of an inlet valve with the storage container comprising guide means which are arranged such that they are able to eliminate a migration of the elastic wall of the pumping body transversely to the pumping direction during the compression of the pumping body.
Specification