Composite diaphragm for diaphragm pumps

Details Composite diaphragm for diaphragm pumps Composite diaphragm for diaphragm pumps

2005-04-12

2005-04-12

Lopez, F. Daniel (Department: 3745)

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

C092S09800R, C092S1030SD

Reexamination Certificate

active

06877419

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.

REFERENCES:
patent: 3435734 (1969-04-01), Bushway et al.
patent: 3911796 (1975-10-01), Hull et al.
patent: 3947156 (1976-03-01), Becker
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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