US4029295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-flow valves
Assignee: HANSEN GmbH KG
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Filing: 1975-10-02
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Granted: 1977-06-14
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Expires: 1995-10-02
Abstract
Abstract A valve comprises a casing having two casing parts with a resilient membrane clamped between the parts. A switching member mounted within the casing deforms the membrane in each of a plurality of different switching positions, to selectively open and close communication between a plurality of connections of the valve.
Inventors
- 👤 Werner Wassmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:09
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/18; F16K11/00; F16K11/02; F16K11/022; Y; Y10; Y10S; Y10S251/00; Y10S251/901; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86847
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
In a valve, means defining a multi-part casing, said casing comprising a first casing part, a second casing part, and at least two fluid flow connections, a membrane located in the casing between the first and second casing parts and acting as a dividing wall between these parts, a switching member mounted in the casing, said switching member having at least one curved switching surface bearing against the membrane, and first and second curved surface portions adjacent the switching surface, said first and second surface portions being curved in the opposite direction to the switching surface and said switching member being movable into a plurality of switching positions to provide a selected communication between, or closure of, the connections, means for moving the switching member between the switching positions, and means defining a projection at the end of the first curved surface portion to prevent the membrane from bulging when the membrane is subjected to pressure and cannot bear against the said first curved surface portion.
Claim 2
Dependent Claim
166 words
In a valve, means defining a multi-part casing, said casing comprising a first casing part, a second casing part, and at least two fluid flow connections, a membrane located in the casing between the first and second casing parts and acting as a dividing wall between these parts, a switching member mounted in the casing, said switching member having at least one curved switching surface bearing against the membrane, and first and second curved surface portions adjacent the switching surface, said first and second surface portions being curved in the opposite direction to the switching surface and said switching member being movable into a plurality of switching positions to provide a selected communication between, or closure of, the connections, means for moving the switching member between the switching positions, and means defining a projection at the end of the first curved surface portion to prevent the membrane from bulging when the membrane is subjected to pressure and cannot bear against the said first curved surface portion.
Claim 3
Dependent Claim
23 words
A valve according to claim 1, wherein the switching member has a second said switching surface adjacent to the second curved surface portion.
Claim 4
Dependent Claim
73 words
A valve according to claim 1, wherein one of said casing parts comprises two opposed walls engaged in the other casing part, said walls serving as supporting surfaces for adjacent side wall portions of the membrane and the said other casing part having sides parallel to said opposed walls of the said one casing part, said sides being spaced from said opposed walls by a distance greater than the thickness of the membrane.
Claim 5
Dependent Claim
16 words
A valve according to claim 1 wherein the switching member is pivotally mounted within the casing.
Claim 6
Dependent Claim
23 words
A valve according to claim 1, further comprising means defining a layer on the side of the membrane facing towards the switching surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |