Back to results
US 4,717,117 AGranted
Vacuum valve using improved diaphragm
AssigneeBendix Electronics S.A.
InventorJohn E. Cook
Life of this patent
Estimating the term…
Abstract
A valve (10) comprising a plurality of passages (22,24), and an annular sealing area (30) in communication with one of the passages. The valve also includes a diaphragm (50), movably supported relative to the sealing area (30) in response to a force differential applied thereacross; including a thin, planar, flexible, non-metallic membrane (92) for sealably engaging against the sealing area.
Claims4
A valve comprising:
- a plurality of passages (22,24) formed in a housing, and an annular sealing area formed about one of said passages;
- a circular diaphragm, received within and supported by the housing and movably relative to said sealing area in response to a force differential applied thereacross;
- including a thin, planar, flexible, non-metallic membrane centrally disposed therein for sealably engaging said sealing area,
- means, disposed adjacent to the outer edge of the membrane, for stiffening such outer edge, comprising an increased thickness portion including an annular groove formed therein and a metal ring received into and secured within such groove,
- a flexible convolute disposed about said portion;
- a spring received upon said ring for biasing the membrane into engagement with the sealing area.
3 more elements
Dependencies are inferred from the claim text.