Importance

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Abstract

In a diaphragm pump with mechanically driven diaphragm and a device for diaphragm rutpure signaling, wherein the diaphragm 2 is clamped at the edge between a pump body 3 and pump cover 4 and is centrally firmly connected with a support plate 5 serving to drive the diaphragm, the design is such that the diaphragm is formed as a multi-layer sandwich diaphragm 2, whose individual layers or diaphragm plies are clamped jointly in the edge region between pump body 3 and pump cover 4. The sandwich diaphragm 2 consists of a working diaphragm 18 with at least one diaphragm ply and a protective diaphragm 20 also with at least one diaphragm ply. The latter is formed so that, with the working diaphragm 18 intact, it is clearly stressed by the delivery pressure less than the working diaphragm 18. Lastly the device for diaphragm rupture signaling has at least one channel 22, 25 disposed between the diaphragms 18, 20 and brought to the outside, for signaling a rupture of the working diaphragm 18.

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First Claim