Patent US4602565A successfully refreshed from Google Patents.
US4602565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exploding foil detonator
Assignee: Teledyne Reynolds Inc
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Filing: 1983-09-26
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Granted: 1986-07-29
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Expires: 2003-09-26
Abstract
Abstract An exploding foil detonator for explosives in which an exploding bridge shears a foil and drives a piece of that foil against an explosive to detonate the latter.
Inventors
- 👤 Herbert J. MacDonald
- 👤 Robert E. Zoret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:50
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/12; F42B3/124
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A detonator comprising: an electrically-conductive bridge; a flyer located immediately adjacent said bridge; an explosive charge including an explosive pellet wrapped within a moisture seal, said explosive charge being spaced from said flyer; a barrel sleeve located between said flyer and said wrapped explosive pellet, said barrel sleeve including a passageway aligned with said bridge and extending to said explosive pellet; and means for pressing said flyer and said wrapped explosive pellet against opposite ends of said barrel sleeve, to seal the passageway of said barrel sleeve, wherein passage of an electrical current through said bridge vaporizes the bridge and propels said flyer through the barrel sleeve passageway to impact upon and detonate said wrapped explosive pellet.
Claim 2
Dependent Claim
117 words
A detonator comprising: an electrically-conductive bridge; a flyer located immediately adjacent said bridge; an explosive charge including an explosive pellet wrapped within a moisture seal, said explosive charge being spaced from said flyer; a barrel sleeve located between said flyer and said wrapped explosive pellet, said barrel sleeve including a passageway aligned with said bridge and extending to said explosive pellet; and means for pressing said flyer and said wrapped explosive pellet against opposite ends of said barrel sleeve, to seal the passageway of said barrel sleeve, wherein passage of an electrical current through said bridge vaporizes the bridge and propels said flyer through the barrel sleeve passageway to impact upon and detonate said wrapped explosive pellet.
Claim 3
Dependent Claim
54 words
A detonator as defined in claim 1, wherein said means for pressing includes: a rigid housing for enclosing said bridge, flyer, explosive charge and barrel sleeve; and spring-biasing means for yieldably urging said flyer and said wrapped explosive pellet against opposite ends of said barrel sleeve, to seal the passageway of said barrel sleeve.
Claim 4
Dependent Claim
24 words
A detonator as defined in claim 2, wherein said spring-biasing means includes a spring located between said wrapped explosive pellet and said rigid housing.
Claim 5
Dependent Claim
41 words
A detonator as defined in claim 1, wherein: said explosive charge further includes first and second explosive blocks located adjacent said wrapped explosive pellet; and detonation of said wrapped explosive pellet by said flyer detonates said first and second explosive blocks.
Claim 6
Dependent Claim
61 words
A detonator as defined in claim 4, wherein said means for pressing includes a spring located between said first and second explosive blocks, for yieldably urging said first explosive block against said wrapped explosive pellet and for yieldably urging said wrapped explosive pellet and said flyer against opposite sides of said barrel sleeve, to seal the passageway of said barrel sleeve.
Claim 7
Dependent Claim
17 words
A detonator as defined in claim 4, wherein said first and second explosive blocks include moisture-resistant coatings.
Claim 8
Dependent Claim
184 words
A detonator comprising: an electrically-conductive bridge; a flyer located immediately adjacent said bridge; an explosive charge including an explosive pellet wrapped within a moisture seal and spaced from said flyer, and first and second explosive blocks having moisture-resistant coatings and located adjacent said explosive pellet such that detonation of said wrapped explosive pellet by said flyer detonates said first and second explosive blocks; a barrel sleeve located between said flyer and said wrapped explosive pellet, said barrel sleeve including a passageway aligned with said bridge and extending to said explosive pellet; a rigid housing for enclosing said bridge, flyer, explosive charge and barrel sleeve; and a spring located between said first and second explosive blocks, for yieldably urging said first explosive block against said wrapped explosive pellet and for yieldably urging said wrapped explosive pellet and said flyer against opposite sides of said barrel sleeve, to seal the passageway of said barrel sleeve; wherein the passage of an electrical current through said bridge vaporizes the bridge and propels said flyer through the barrel sleeve passageway to impact upon and detonate said wrapped explosive pellet.
Claim 9
Dependent Claim
184 words
A detonator comprising: an electrically-conductive bridge; a flyer located immediately adjacent said bridge; an explosive charge including an explosive pellet wrapped within a moisture seal and spaced from said flyer, and first and second explosive blocks having moisture-resistant coatings and located adjacent said explosive pellet such that detonation of said wrapped explosive pellet by said flyer detonates said first and second explosive blocks; a barrel sleeve located between said flyer and said wrapped explosive pellet, said barrel sleeve including a passageway aligned with said bridge and extending to said explosive pellet; a rigid housing for enclosing said bridge, flyer, explosive charge and barrel sleeve; and a spring located between said first and second explosive blocks, for yieldably urging said first explosive block against said wrapped explosive pellet and for yieldably urging said wrapped explosive pellet and said flyer against opposite sides of said barrel sleeve, to seal the passageway of said barrel sleeve; wherein the passage of an electrical current through said bridge vaporizes the bridge and propels said flyer through the barrel sleeve passageway to impact upon and detonate said wrapped explosive pellet.
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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |