Patent US4607573A successfully refreshed from Google Patents.
US4607573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated fuse and manufacturing process therefor
Assignee: Dyno Nobel Holding AS
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Filing: 1984-04-03
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Granted: 1986-08-26
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Expires: 2004-04-03
Abstract
Abstract A fuse having two juxtaposed coextensive tubular housing layers is provided with a reactive material deposited within the inner tube, which inner tube is elongated or stretched before forming the outer tubular layer. In the method of manufacture, the inner tubular member is provided with a reactive material, primarily along its inner surface, thereafter stretched to provide the desired inner tube dimensions with the desired reactive material core load per unit length, the stretched tube is then provided with an outer tubular covering.
Inventors
- 👤 Gary R. Thureson
- 👤 Ernest L. Gladden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:07
CPC Classifications
C; C06; C06C; C06C5/00; C06C5/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
87 words
A method of producing a fuse comprising the steps of: (a) forming a first tube having an inner surface and an outer surface; (b) placing a reactive material in a core load per unit length within said first tube; (c) elongating said first tube whereby the wall thickness of said first tube and core load per unit length of said reactive material are reduced; and (d) applying an outer coating onto said outer surface of said first tube, said coating arranged coextensively to said elongating first tube.
Claim 2
Independent Claim
87 words
A method of producing a fuse comprising the steps of: (a) forming a first tube having an inner surface and an outer surface; (b) placing a reactive material in a core load per unit length within said first tube; (c) elongating said first tube whereby the wall thickness of said first tube and core load per unit length of said reactive material are reduced; and (d) applying an outer coating onto said outer surface of said first tube, said coating arranged coextensively to said elongating first tube.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein said step of placing said reactive material includes applying a coating of said reactive material in a core load per unit length of said first tube onto said inner surface of said first tube.
Claim 4
Dependent Claim
31 words
The method of claim 2 further comprising the step of heating to soften said first tube whereby said step of elongating occurs principally within the softened area of said first tube.
Claim 5
Dependent Claim
66 words
The method of claim 3 wherein said step of applying an outer coating on said outer surface of said first tube includes applying said outer coating under a vacuum for a period of time and at temperature sufficient to draw said outer coating onto said outer surface of said first tube thereby increasing adhesion between said outer surface of said first tube and said outer coating.
Claim 6
Dependent Claim
28 words
The method of claim 4 wherein said step of applying said outer coating occurs by thermally extruding said outer coating around said outer surface of said first tube.
Claim 7
Dependent Claim
51 words
The method of claim 2 or 5 further comprising the steps of: (e) applying heat to said two-layer fuse; and (f) elongating said two-layer fuse whereby the wall thickness of both said first tube and said outer layer are reduced and said reactive material core load per unit length is reduced.
Claim 8
Dependent Claim
29 words
The method of claim 6 further comprising the step of: (g) applying an outermost coating coextending around said outer coating of elongated two-layer fuse thereby forming a multi-layer fuse.
Claim 9
Dependent Claim
92 words
A fuse for propagating a percussion wave formed by a method comprising the steps of: (a) forming a first tube having an inner surface and an outer surface; (b) placing a reactive material in a core load per unit length within said first tube; (c) elongating said first tube whereby the wall thickness of said first tube and core load per unit length of said reactive material are reduced; and (d) applying an outer coating onto said outer surface of said first tube, said coating arranged coextensively to said elongated first tube.
Claim 10
Dependent Claim
92 words
A fuse for propagating a percussion wave formed by a method comprising the steps of: (a) forming a first tube having an inner surface and an outer surface; (b) placing a reactive material in a core load per unit length within said first tube; (c) elongating said first tube whereby the wall thickness of said first tube and core load per unit length of said reactive material are reduced; and (d) applying an outer coating onto said outer surface of said first tube, said coating arranged coextensively to said elongated first tube.
Claim 11
Dependent Claim
40 words
The fuse of claim 8 wherein said step of placing said reactive material includes applying a coating of said reactive material in a core load per unit length of said first tube onto said inner surface of said first tube.
Claim 12
Dependent Claim
35 words
The fuse of claim 9 further formed by the method comprising the step of heating to soften said first tube whereby said step of elongating occurs principally within the softened area of said first tube.
Claim 13
Dependent Claim
70 words
The fuse formed under the method of claim 10 wherein said step of applying an outer coating on said outer surface of said first tube includes applying said outer coating under a vacuum for a period of time and at temperature sufficient to draw said outer coating onto said outer surface of said first tube thereby increasing adhesion between said outer surface of said first tube and said outer surface.
Claim 14
Dependent Claim
32 words
The fuse formed under the method of claim 11 wherein said step of applying said outer coating occurs by thermally extruding said outer coating around said outer surface of said first tube.
Claim 15
Dependent Claim
53 words
The fuse formed under the method of claim 12 further comprising the steps of: (e) applying heat to said two-layer fuse; and (f) elongating said two-layer fuse whereby the wall thickness of both said first tube and said outer layer are reduced and said reactive material core load per unit length is reduced.
Claim 16
Dependent Claim
33 words
The fuse formed under the method of claim 13 further comprising the step of: (g) applying an outermost coating coextending around said outer coating of elongated two-layer fuse thereby forming a multi-layer fuse.
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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) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |