Patent US3670925A successfully refreshed from Google Patents.
US3670925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosively activated glass valve
Assignee: Zeneca Inc
•
Filing: 1969-10-28
•
Granted: 1972-06-20
•
Expires: 1989-10-28
Abstract
Abstract A valve having an internally stressed, hermetically sealed glass barrier to the passage of fluids. An explosive charge opens the valve by pulverizing the glass barrier. Three embodiments are disclosed: a charge imbedded in the glass, a shaped charge directed at the glass, and a charge placed near the edge of the glass outside the conduit for the fluid.
Inventors
- 👤 Donald A Moyant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:13
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/268; F; F16; F16K; F16K17/00; F16K17/40; F16K17/403; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1647; Y10T137/1692
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
57 words
A valve comprising (1) a metal conduit for the passage of a fluid; (2) a glass barrier forming a hermetic seal to the passage of said fluid through said metal conduit, said barrier being sufficiently internally stressed so that when shattered it will be pulverized; and (3) an explosive charge positioned to shatter said barrier when detonated.
Claim 2
Dependent Claim
57 words
A valve comprising (1) a metal conduit for the passage of a fluid; (2) a glass barrier forming a hermetic seal to the passage of said fluid through said metal conduit, said barrier being sufficiently internally stressed so that when shattered it will be pulverized; and (3) an explosive charge positioned to shatter said barrier when detonated.
Claim 3
Dependent Claim
12 words
The valve of claim 1 wherein said explosive charge is electrically activated.
Claim 4
Dependent Claim
15 words
The valve of claim 2 wherein said explosive charge is electrically activated through a bridgewire.
Claim 5
Dependent Claim
16 words
The valve of claim 1 wherein said explosive charge is in contact with said glass barrier.
Claim 6
Dependent Claim
20 words
The valve of claim 1 wherein said explosive charge is a shaped charge and is directed at said glass barrier.
Claim 7
Dependent Claim
45 words
The valve of claim 1 wherein said explosive charge is positioned near the edge of said glass barrier in contact with said conduit so that the force of said explosive charge when detonated is transmitted to the edge of said glass barrier through said conduit.
Claim 8
Dependent Claim
13 words
The valve of claim 1 wherein said glass barrier is a compression seal.
Claim 9
Dependent Claim
14 words
The valve of claim 1 wherein said glass barrier is a matched glass-to-metal seal.
Claim 10
Dependent Claim
107 words
A canister comprising (1) a metal container having a mouth; (2) a metal plug threadedly engaged with said mouth of said container in a hermetic relationship therewith, said plug having conduit therethrough; (3) a glass barrier forming a hermetic seal to the passage of a fluid through said conduit, said barrier being sufficiently internally stressed so that when shattered it will be pulverized; (4) at least one pair of metal pins passing through said barrier in a hermetic relationship therewith; (5) a bridgewire connecting the pins in each pair of said pins inside said container; and (6) an explosive charge positioned in detonating relationship to each bridgewire.
Claim 11
Dependent Claim
107 words
A canister comprising (1) a metal container having a mouth; (2) a metal plug threadedly engaged with said mouth of said container in a hermetic relationship therewith, said plug having conduit therethrough; (3) a glass barrier forming a hermetic seal to the passage of a fluid through said conduit, said barrier being sufficiently internally stressed so that when shattered it will be pulverized; (4) at least one pair of metal pins passing through said barrier in a hermetic relationship therewith; (5) a bridgewire connecting the pins in each pair of said pins inside said container; and (6) an explosive charge positioned in detonating relationship to each bridgewire.
Claim 12
Dependent Claim
16 words
A canister according to claim 9 wherein said fluid within said container is a compressed gas.
Claim 13
Dependent Claim
15 words
A canister according to claim 9 wherein two pairs of pins pass through said barrier.
Claim 14
Dependent Claim
13 words
The canister of claim 9 wherein said glass barrier is a compression seal.
Claim 15
Dependent Claim
14 words
A canister of claim 9 wherein said glass barrier is a matched glass-to-metal seal.
References Cited (Backward Citations)
US2408774A
Cited
US2478958A
Cited
US2441011A
Cited
US2691459A
Cited
US2797760A
Cited
US2736459A
Cited
US3088478A
Cited
US3264079A
Cited
US3191533A
Cited
US3196610A
Cited
US3567245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |