Patent ID: 6055898
Filing Date: 2000-05-02
Classification: F04B

Abstract:
Membrane (1) for a membrane pump, havinga membrane body (2) of elastic material, of a substantially annular outer region of lesser thickness which is mounted at its periphery, and, adjoining thereto radially towards the centre, a central region which becomes thicker, anda rigid form core (3) vulcanised into the central region of the membrane body (2), for connection with a pump drive part,a) the outer diameter (F) of the formed core (3) being less than one third of the outer diameter (D) of the membrane body (2),b) the material thickness (L) of the membrane body (2) in the central region above the formed core (3) being between 7.5% and 20% of the outer diameter (D) of the membrane andc) the central region of the membrane body (2) being, on a side away from a pump chamber (5), truncated cone shaped.