A device for regulating the pressure in the negative-pressure system of an electrically operated suction pump for physiological applications

摘要

System for pressure regulation in the vacuum section of an electrically powered vacuum/suction pump are in palynological applications in partic. a breast milk extraction system, suction pump or vacuum massager, has a flexible pipe or hose attached as the control and/or cut off device Elastic material is used in the production of this hose, and the inner cross section of the hose can be altered by application of an external force to range between zero i.e. closed, and its normal maximum during the application of the external force.