US3830462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valves
Assignee: SPIRAN SARCO Ltd
•
Filing: 1973-12-28
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Granted: 1974-08-20
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Expires: 1993-12-28
Abstract
Abstract A valve including a passage for fluid to pass through having a flexible walled portion, an obstructor within this portion, and means for bringing this portion into engagement with the obstructor to seal the portion to the obstructor and hence close the passage to fluid flow, this means including a coil of filamentary material around the flexible walled portion, and a member for acting on the coils to cause them to act on the flexible walled portion to effect said engagement.
Inventors
- 👤 G Henfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:19
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/02; F16K7/04; F16K7/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
A valve including an annular passage for fluid to pass through defined by a flexible wall and an obstructor within the wall, and operating mechanism for bringing about engagement between the wall and the obstructor to seal the wall to the obstructor and hence close the passage to fluid flow; said operating mechanism comprising a frusto-conical cam surface surrounding the flexible wall and movable substantially axially of the intended direction of fluid flow through the passage, and a coil of filamentary material disposed intermediate the cam surface and the flexible wall with its direction of length extending around the flexible wall so that the coils extend across the gap between the cam surface and the flexible wall to be acted upon by the cam surface, upon axial movement thereof, to be moved substantially radially with respect to said intended direction of fluid flow to act on the wall to bring about said engagement, the coils being so closely spaced together as to present a substantially continuous surface to the flexible wall in the closed condition of the valve.
Claim 2
Dependent Claim
178 words
A valve including an annular passage for fluid to pass through defined by a flexible wall and an obstructor within the wall, and operating mechanism for bringing about engagement between the wall and the obstructor to seal the wall to the obstructor and hence close the passage to fluid flow; said operating mechanism comprising a frusto-conical cam surface surrounding the flexible wall and movable substantially axially of the intended direction of fluid flow through the passage, and a coil of filamentary material disposed intermediate the cam surface and the flexible wall with its direction of length extending around the flexible wall so that the coils extend across the gap between the cam surface and the flexible wall to be acted upon by the cam surface, upon axial movement thereof, to be moved substantially radially with respect to said intended direction of fluid flow to act on the wall to bring about said engagement, the coils being so closely spaced together as to present a substantially continuous surface to the flexible wall in the closed condition of the valve.
Claim 3
Dependent Claim
14 words
A valve according to claim 1, wherein said coil is formed by a spring.
Claim 4
Dependent Claim
30 words
A valve according to claim 1, wherein said operating mechanism further comprises means for applying fluid pressure to the cam surface for bringing about operative movement of the cam surface.
Claim 5
Dependent Claim
25 words
A valve according to claim 3, wherein said means is arranged for supplying the pressure of fluid flowing through the valve to the cam surface.
Claim 6
Dependent Claim
14 words
A valve according to claim 3, wherein said means is effective against resilient opposition.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |