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US 6,877,419 B2Granted
Composite diaphragm for diaphragm pumps
AssigneeULMAN Dichtungstechnik GmbH
InventorsJoachim Öhrle, Leon Radom
Life of this patent
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Abstract
A composite diaphragm for diaphragm pumps comprises an elastomer body and a polytetrafluoroethylene (PFTE) coating on its back side. The elastomer body has a shape of a circular dish that has an edge region with a clamping area, a bottom and a flexible section of the diaphragm that connects the edge of the dish with the bottom. The flexible section of the diaphragm comprises a multitude of naps forming elevations on the coated side of the elastomer body. The PFTE coating is a plane ring surface with the area of the flexible section of the diaphragm.
Claims14
A composite diaphragm for diaphragm pumps comprising:
- a) an elastomer body shaped as a circular disk, the body comprising:
- i) a dish edge having a clamping area;
- ii) a bottom section;
- iii) a flexible diaphragm section connecting said dish edge with said bottom section;
- iv) a plurality of naps disposed on said elastomer body, said naps being configured as convex spherical segments which reinforce the diaphragm section at certain points, wherein in a radial direction, the naps are arranged on lines that run through a center point of the circular disk, lined up on said lines and spaced apart;
- and
- b) a polytetraflouroethylene (PFTE) coating disposed on a product side of the body, said coating being in a form of a plane ring surface in an area of said flexible diaphragm section, wherein said naps are coated by said coating and form elevations in said coating.
4 more elements
Dependencies are inferred from the claim text.