US3590739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuse
Assignee: Nitro Nobel AB
•
Filing: 1968-07-16
•
Granted: 1971-07-06
•
Expires: 1988-07-16
Abstract
Abstract A fuse apparatus including an elongated hollow tube with a reactive substance coating the inner periphery and adapted to support a gaseous percussion wave throughout the length of the tube.
Inventors
- 👤 Per-Anders Persson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:25
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04; C; C06; C06C; C06C5/00; C06C5/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
A fuse consisting of wall structure defining a hollow elongated tube forming a coherent gas channel, means for creating a percussion wave within said tube, means for sustaining said percussion wave, said percussion sustaining means comprising a reactive substance distributed as a thin layer on the inner surface of said tube and being directly exposed to said gas channel, so that said percussion wave will be successively sustained at high temperature and high velocity by the reactive substance for the entire length of the tube.
Claim 2
Dependent Claim
85 words
A fuse consisting of wall structure defining a hollow elongated tube forming a coherent gas channel, means for creating a percussion wave within said tube, means for sustaining said percussion wave, said percussion sustaining means comprising a reactive substance distributed as a thin layer on the inner surface of said tube and being directly exposed to said gas channel, so that said percussion wave will be successively sustained at high temperature and high velocity by the reactive substance for the entire length of the tube.
Claim 3
Dependent Claim
25 words
The structure of claim 1 in which the quantity of the reactive substance is no more than 0.5 gram per meter length of said tube.
Claim 4
Dependent Claim
24 words
The structure of claim 1 in which the quantity of reactive substance is no more than 0.2 gram per meter length of said tube.
Claim 5
Dependent Claim
24 words
The structure of claim 1 in which the quantity of reactive substance is no more than 0.1 gram per meter length of said tube.
Claim 6
Dependent Claim
18 words
The structure of claim 1 in which the reactive substance partially covers the inner surfaces of said tube.
Claim 7
Dependent Claim
38 words
The structure of claim 1 in which tHe reactive substance is a highly shattering explosive which at least partly is constituted of the group including the substances pentaerythritoltetranitrate (PETN), cyclotrimethylenetrinitramine (RDX), cyclotetramethylenetetranitramine (HMX), tetryl, ditrinitroethylurea and trinitrotoluene (TNT).
Claim 8
Dependent Claim
15 words
The structure of claim 1 including means for supporting the wall structure of said tube.
Claim 9
Dependent Claim
25 words
The structure of claim 7 in which said supporting means includes projections integrally formed with said wall structure and extending inwardly into said gas channel.
Claim 10
Dependent Claim
23 words
The structure of claim 7 in which said supporting means includes a separate insert element extending in the longitudinal direction of said tube.
Claim 11
Dependent Claim
14 words
The structure of claim 9 including a reactive substance carried by said insert element.
References Cited (Backward Citations)
CA716835A
Cited
US2482091A
Cited
US2726602A
Cited
US2938432A
Cited
US3332353A
Cited
US3027839A
Cited
US3296968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |