Patent ID: 7363850
Filing Date: 2008-04-29
Classification: F04B

Abstract:
1. Diaphragm pump ( 1 ) comprising a working diaphragm ( 3 ), which, during pumping movements, oscillates between a bottom dead center and a top dead center, which delimits a pump chamber ( 7 ) between the working diaphragm and a pump chamber wall ( 6 ), and which rests against the pump chamber wall ( 6 ) in the top dead center, the working diaphragm ( 3 ) has an inner and an outer annular zone ( 8 , 9 ), which are deformable during the pumping movements, a stiffened diaphragm area that is generally non-deformable during the pumping movements is arranged between the deformable annular zones ( 8 , 9 ), and the working diaphragm ( 3 ) is stiffened in the stiffened diaphragm area by support ribs ( 10 ), which are oriented in a radial direction and are spaced apart from each other in a circumferential direction, and which are arranged on a lower side of the diaphragm facing away from the pump chamber wall ( 6 ).