US4249566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure-operated valves
Assignee: DSB Valves Ltd
•
Filing: 1979-02-05
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Granted: 1981-02-10
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Expires: 1999-02-05
Abstract
Abstract An emergency two-way shut-off valve comprises a housing and two valve members having openings therethrough which when the valve members are spaced apart, permit flow of fluid through the valve but, when the valve members are pressed together, are blocked off by imperforate portions of the valve members. Both valve members are movable and spring-urged apart towards respective stops within the housing.
Inventors
- 👤 Moray P. Deane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:38
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/02; F16K17/04; F16K17/0413; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7785; Y10T137/7837; Y10T137/7838; Y10T137/7845; Y10T137/7859; Y10T137/7869; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7922; Y10T137/7929; Y10T137/7938
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
An emergency two-way shut-off valve comprising a housing and two valve members each one of which is movable apart from and towards the other valve member and spring-urged apart toward respective stops within the housing, the valve members having openings therethrough which, when the valve members are spaced apart, permit flow of fluid through the valve but, when the valve members are pressed together, are blocked off by imperforate portions of the valve members.
Claim 2
Dependent Claim
74 words
An emergency two-way shut-off valve comprising a housing and two valve members each one of which is movable apart from and towards the other valve member and spring-urged apart toward respective stops within the housing, the valve members having openings therethrough which, when the valve members are spaced apart, permit flow of fluid through the valve but, when the valve members are pressed together, are blocked off by imperforate portions of the valve members.
Claim 3
Dependent Claim
24 words
A valve according to claim 1, in which there is a plurality of openings through each valve member equally spaced apart around an axis.
Claim 4
Dependent Claim
70 words
A valve according to claim 2, in which there are helical grooves in the housing and formations on the circumference of each valve member slidingly fitting into the grooves whereby the movement of one valve member relative to the other valve member is accompanied by a turning movement of the moving valve member so that when the valve members are fully spaced apart the openings therein are in substantial aligment.
Claim 5
Dependent Claim
29 words
A valve according to claim 1, in which there is a central opening through one of the valve members and a ring of openings through the other valve member.
References Cited (Backward Citations)
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Cited
US2179144A
Cited
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Cited
US2748798A
Cited
FR1217652A
Cited
US3221880A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |