US4492167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially combustible propellant charge igniter
Assignee: Dynamit Nobel AG
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Filing: 1983-05-19
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Granted: 1985-01-08
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Expires: 2003-05-19
Abstract
Abstract A partially combustible propellant charge igniter in which combustible ignition-conducting tubes can be more advantageously separated. The igniter includes a metallic bottom piece accommodating an igniter charge therein, a centrally arranged ignition gas guide chamber in communication with the igniter charge for guiding ignition gas therefrom and a combustible ignition-conducting tube accommodating a propagation charge. The ignition-conducting tube is inserted into the bottom piece and extends outwardly therefrom with the propagation charge being arranged in the region of the ignition-conducting tube which extends outwardly from the bottom piece. The igniter includes at least one cavity accommodating a separating charge and being at least partially delimited by a wall of the ignition gas guide chamber and the ignition-conducting tube inserted in the bottom piece, and a nozzle for establishing a communicating connection of the cavity to the portion of the ignition-conducting tube accommodating the propagation charge. The nozzle enables the escape of gases produced by the separating charge after ignition of the separating charge.
Inventors
- 👤 Uwe Brede
- 👤 Alfred Horr
- 👤 Horst Penner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:03
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/0823; F42C19/0826; F42C19/083
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
147 words
A partially combustible propellant charge igniter comprising a metallic bottom piece accommodating an igniter charge therein, a centrally arranged ignition gas guide chamber in communication with the igniter charge for guiding ignition gas therefrom, a combustible ignition-conducting tube accommodating a propagation charge, the ignition-conducting tube being inserted into the bottom piece and extending outwardly therefrom, the propagation charge being arranged in the region of the ignition-conducting tube extending outwardly from the bottom piece, at least one cavity accommodating a separating charge and being at least partially delimited by a wall of the ignition gas guide chamber and the ignition-conducting tube portion inserted in the bottom piece, and nozzle means for establishing a communicating connection of the cavity to the portion of the ignition-conducting tube accommodating the propagation charge, the nozzle means enabling the escape of gases produced by the separating charge after ignition of the separating charge.
Claim 2
Dependent Claim
147 words
A partially combustible propellant charge igniter comprising a metallic bottom piece accommodating an igniter charge therein, a centrally arranged ignition gas guide chamber in communication with the igniter charge for guiding ignition gas therefrom, a combustible ignition-conducting tube accommodating a propagation charge, the ignition-conducting tube being inserted into the bottom piece and extending outwardly therefrom, the propagation charge being arranged in the region of the ignition-conducting tube extending outwardly from the bottom piece, at least one cavity accommodating a separating charge and being at least partially delimited by a wall of the ignition gas guide chamber and the ignition-conducting tube portion inserted in the bottom piece, and nozzle means for establishing a communicating connection of the cavity to the portion of the ignition-conducting tube accommodating the propagation charge, the nozzle means enabling the escape of gases produced by the separating charge after ignition of the separating charge.
Claim 3
Dependent Claim
41 words
A partially combustible propellant charge igniter according to claim 1, wherein the ignition gas guide chamber is provided with a first diameter and the ignition-conducting tube is provided with a second diameter, the second diameter being larger than the first diameter.
Claim 4
Dependent Claim
33 words
A partially combustible propellant charge igniter according to claim 1, wherein a metal plate is provided adjacent the ignition-conducting tube in the region of the cavity and facing the interior of the cavity.
Claim 5
Dependent Claim
20 words
A propellant charge igniter according to claim 1, wherein the nozzle means has a width between 0.2 and 0.7 mm.
Claim 6
Dependent Claim
20 words
A partially combustible propellant charge igniter according to claim 1, wherein the cavity is configured as an annular hollow chamber.
Claim 7
Dependent Claim
24 words
A partially combustible propellant charge igniter according to claim 5, wherein the separating charge accommodated in the cavity is configured as annular pill members.
Claim 8
Dependent Claim
20 words
A partially combustible propellant charge igniter according to claim 5, wherein the nozzle means is configured as an annular nozzle.
Claim 9
Dependent Claim
21 words
A partially combustible propellant charge igniter according to claim 7, wherein the nozzle has a width between 0.2 and 0.7 mm.
Claim 10
Dependent Claim
30 words
A partially combustible propellant charge igniter according to claim 1, wherein the cavity is provided with a wall portion having a bevel extending in the direction of the nozzle means.
Claim 11
Dependent Claim
22 words
A partially combustible propellant charge igniter according to claim 9, wherein the angle of the bevel of the wall portion is 45°.
Claim 12
Dependent Claim
51 words
A partially combustible propellant charge igniter according to claim 1, wherein the wall of the ignition gas guide chamber delimiting a portion of the cavity is configured as a tube centrally disposed in the bottom piece, the tube having an outwardly projecting collar extending in the direction of the ignition-conduting tube.
Claim 13
Dependent Claim
33 words
A partially combustible propellant charge igniter according to claim 1, wherein a gas-absorbing chamber is provided adjacent to the cavity, the gas-absorbing chamber enabling improved throughflow through the separating charge in the cavity.
Claim 14
Dependent Claim
17 words
A partially combustible propellant charge igniter according to claim 1, wherein the metallic bottom piece is multipartite.
Claim 15
Dependent Claim
29 words
A partially combustible propellant charge igniter according to claim 8, wherein the cavity is provided with a wall portion having a bevel extending in the direction of the nozzle.
Claim 16
Dependent Claim
25 words
A partially combustible propellant charge igniter according to claim 14, wherein the angle of the bevel of the wall portion is between 40° and 50°.
Claim 17
Dependent Claim
24 words
A partially combustible propellant charge igniter according to claim 15, wherein the separating charge accommodated in the cavity is configured as annular pill members.
Claim 18
Dependent Claim
25 words
A partially combustible propellant charge igniter according to claim 16, wherein at least one of the pill members adjacent to the nozzle includes delay means.
Claim 19
Dependent Claim
33 words
A partially combustible propellant charge igniter according to claim 17, wherein a metal plate is provided adjacent the ignition-conducting tube in the region of the cavity and facing the interior of the cavity.
Claim 20
Dependent Claim
37 words
A partially combustible propellant charge igniter according to claim 18, wherein a gas-absorbing chamber is provided adjacent to the cavity at a position away from the nozzle, the gas-absorbing chamber enabling improved throughflow through the separating charge.
Claim 21
Dependent Claim
59 words
A partially combustible propellant charge igniter according to claim 19, wherein the wall of the ignition guide chamber delimiting a portion of the cavity is configured as a tube centrally disposed in the bottom piece, the tube having an outwardly projecting collar extending in the direction of the ignition-conducting tube for forming at least a part of the nozzle.
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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |