SUCTION PUMP FOR DRAINING BODY FLUIDS FROM BODY CAVITIES

摘要

A suction pump is used for draining body fluids from body cavities and has a bottom portion (1) and a resilient pump body (2) with a domed shape. The pump also has an inlet valve (27) and an outlet valve (17). The pump stroke is provided by the elastic deformation of the pump body (2) towards the bottom (1) and the suction stroke is provided due to the elasticity of the pump body (2). In order to achieve only a small pump clearance volume the pump body (2) has a smooth inner surface and the bottom has a concave inner side (8) corresponding to the inner configuration of the pump body (2) when it has been deformed for starting the suction stroke of the pump.