Flexible gas impermeable sandwich diaphragm

Details Flexible gas impermeable sandwich diaphragm Flexible gas impermeable sandwich diaphragm

1990-09-28

1991-12-24

Look, Edward K.

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

92103R, 92103F, 92103M, F01B 1900

Patent

active

050741969

ABSTRACT:
The present invention provides a compliant molded diaphragm which includes an operable surface area for forming a flexiblle barrier to prevent fluid flow between opposing sides of the diaphragm. The diaphragm is formed as a sandwich structure having first and second elastomeric layers and a third gas impermeable layer located between the first and second layers. The third layer may be provided as a thin layer of metal which is vapor deposited between the two elastomeric layers or may be a thin gas impermeable polymer film. The impermeable layer is preferably formed as a grid pattern in the operable surface area of the diaphragm such that portions of the first and second layers are exposed to each other whereby the first and second layers may be bonded to each other to prevent separation of the layers of the diaphragm.

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patent: 4989497 (1991-02-01), Lerma

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