Composite diaphragm for diaphragm pumps

Details Composite diaphragm for diaphragm pumps Composite diaphragm for diaphragm pumps

2005-08-02

2005-08-02

Lazo, Thomas E. (Department: 3745)

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

C092S1030SD

Reexamination Certificate

active

06923108

ABSTRACT:
A composite diaphragm for diaphragm pumps comprises an elastomer body and a polytetrafluoroethylene (PTFE) 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 elastomer backside of the elastomer body. The PTFE coating is a plane ring surface with the area of the flexible section of the diaphragm.

REFERENCES:
patent: 3911796 (1975-10-01), Hull et al.
patent: 4270441 (1981-06-01), Tuck, Jr.
patent: 5349896 (1994-09-01), Delaney et al.
patent: 5699717 (1997-12-01), Riedlinger

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