Patent US3854491A successfully refreshed from Google Patents.
US3854491A
Expired / Lapsed
US
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Controlled opening, variable orifice, explosively actuated valve
Assignee: ETI EXPLOSIVES TECHNOLOGIES INTE
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Filing: 1972-01-03
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Granted: 1974-12-17
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Expires: 1992-01-03
Abstract
Abstract A diaphragm that closes the opening of a valve to passage therethrough of a fluid under pressure is perforated by actuation in controlled sequence of two or more electroexplosive devices thereby opening the diaphragm in two or more stages for passage of fluid through said valve.
Inventors
- 👤 P Bryan
- 👤 R Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:37
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/268; B60R21/263; B60R2021/2633; Y; Y10; Y10S; Y10S137/00; Y10S137/91; Y10T; Y10T137/00; Y10T137/0318; Y10T137/1624; Y10T137/1632; Y10T137/1647; Y10T137/1692; Y10T137/1744
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A valve comprising a body having a passage therethrough which passage provides an inlet and an outlet for fulid under pressure, a fluid-impermeable disphragm closing said passage to the movement of said fluid, a plurality of electrically actuated and explosively operated devices adapted to perforate said diaphragm, means to sequentially activate said devices thereby producing an initial opening of the diaphragm which is smaller than that of the final opening in said diaphragm followed by an enlarged opening to obtain final opening of said diaphragm.
Claim 2
Dependent Claim
85 words
A valve comprising a body having a passage therethrough which passage provides an inlet and an outlet for fulid under pressure, a fluid-impermeable disphragm closing said passage to the movement of said fluid, a plurality of electrically actuated and explosively operated devices adapted to perforate said diaphragm, means to sequentially activate said devices thereby producing an initial opening of the diaphragm which is smaller than that of the final opening in said diaphragm followed by an enlarged opening to obtain final opening of said diaphragm.
Claim 3
Dependent Claim
42 words
the valve of claim 1 wherein said diaphragm has relatively thin sections which define a pattern for rupture of the diaphragm and wherein said devices are arranged to perforate said diaphragm adjacent at least a portion of said relatively thin cross section.
Claim 4
Dependent Claim
13 words
The valve of claim 2 wherein said devices are electrically actuated blasting caps.
Claim 5
Dependent Claim
13 words
The valve of claim 1 wherein said devices are electrically actuated blasting caps.
Claim 6
Independent Claim
63 words
A method for opening a passageway for fluid which passageway is normally closed by a fluid impermeable diaphragm comprising perforating said diaphragm by sequentially actuating electroexplosive diaphragm-perforating means such that there is produced an initial opening of the diaphragm which is smaller than that of the final opening in said diaphragm followed by an enlarged opening to obtain final opening of said diaphragm.
Claim 7
Independent Claim
63 words
A method for opening a passageway for fluid which passageway is normally closed by a fluid impermeable diaphragm comprising perforating said diaphragm by sequentially actuating electroexplosive diaphragm-perforating means such that there is produced an initial opening of the diaphragm which is smaller than that of the final opening in said diaphragm followed by an enlarged opening to obtain final opening of said diaphragm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |