US4922823A
Expired / Lapsed
US
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Ignition transfer charge for a propelling charge
Assignee: Rheinmetall Industrie AG
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Filing: 1988-08-31
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Granted: 1990-05-08
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Expires: 2008-08-31
Abstract
Abstract An ignition transfer body for a propellant-charge module is coaxially surrounded by a supporting tube and includes at least one clear ignition channel. The ignition transfer charge is composed of a first propellant-charge powder generating thermal energy in a range of 3 kJ/g to 4.5 kJ/g, and the supporting tube is composed of a second propellant-charge powder. Preferably, the second propellant-charge powder forming the supporting tube is pressed powder which is extruded or pressed in a mold.
Inventors
- 👤 Eckhard Rahnenfuhrer
- 👤 Albert Schulze
- 👤 Heinz Jaskolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:57
CPC Classifications
F; F42; F42B; F42B5/00; F42B5/38; C; C06; C06C; C06C9/00; F42C; F42C19/00; F42C19/08; F42C19/085
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
81 words
An ignition transfer body for a propellant-charge module, comprising: (a) an ignition transfer charge having a longitudinal axis composed of a high energy first propellant-charge powder generating thermal energy in a range from 3 kJ/g to 4.5 kJ/g, having at least one clear ignition channel having a longitudinal axis oriented in a direction generally parallel to said longitudinal axis of said ignition transfer charge; and (b) a supporting tube composed of a second propellant-charge powder coaxially encasing said ignition transfer charge.
Claim 2
Dependent Claim
81 words
An ignition transfer body for a propellant-charge module, comprising: (a) an ignition transfer charge having a longitudinal axis composed of a high energy first propellant-charge powder generating thermal energy in a range from 3 kJ/g to 4.5 kJ/g, having at least one clear ignition channel having a longitudinal axis oriented in a direction generally parallel to said longitudinal axis of said ignition transfer charge; and (b) a supporting tube composed of a second propellant-charge powder coaxially encasing said ignition transfer charge.
Claim 3
Dependent Claim
21 words
An ignition transfer body as defined in claim 1, wherein said second propellant-charge powder is in the form of pressed powder.
Claim 4
Dependent Claim
29 words
An ignition transfer body as defined in claim 1, wherein said ignition transfer charge comprises a preshaped tube which is connected with an inner wall of said supporting tube.
Claim 5
Dependent Claim
28 words
An ignition transfer body as defined in claim 1, wherein said high energy first propellant-charge powder is composed of a mixture of nitrocellulose containing 20% to 50% nitroglycerin.
Claim 6
Dependent Claim
54 words
An ignition transfer body as defined in claim 1, wherein said ignition transfer charge has a solid cylindrical shape and includes a plurality of clear ignition channels which are symmetrically disposed about said longitudinal axis of said ignition transfer charge, said ignition transfer charge being connected to an interior wall of said supporting tube
Claim 7
Dependent Claim
26 words
An ignition transfer body as defined in claim 1, wherein said supporting tube and said ignition transfer charge are connected together by an adhesive attaching means.
Claim 8
Dependent Claim
24 words
An ignition transfer body as defined in claim 1, wherein said supporting tube and said ignition transfer charge comprise a single jointly extruded tube.
Claim 9
Dependent Claim
26 words
An ignition transfer body as defined in claim 1, wherein said ignition transfer charge comprises a coating sprayed onto an interior wall of said supporting tube.
Claim 10
Dependent Claim
38 words
An ignition transfer body as defined in claim 1, wherein said ignition transfer charge comprises a thin sheet formed into a tube-shaped body which is fixed to an interior wall of said supporting tube by an attaching means.
Claim 11
Dependent Claim
43 words
An ignition transfer body as defined in claim 1, wherein said ignition transfer charge has a hollow tubular shape; and said ignition transfer charge and said supporting tube have a combined tube wall thickness in a range between 1 mm and 10 mm.
Claim 12
Dependent Claim
36 words
An ignition transfer body as defined in claim 1, wherein said clear ignition channel is delimited by an interior surface of said ignition transfer charge, said interior surface having a plurality of longitudinally disposed grooves therein.
Claim 13
Dependent Claim
44 words
An ignition transfer body as defined in claim 1, wherein said clear ignition channel is bounded by an interior surface of said ignition transfer charge, said interior surface having a plurality of transverse grooves therein which are disposed generally concentrically about said longitudinal axis.
Claim 14
Dependent Claim
103 words
A propellant-charge module of the type including an envelope having a longitudinal axis and containing a propellant-charge powder, and a tubular ignition body supported within the envelope disposed coaxially about the longitudinal axis and having a longitudinally oriented clear ignition passage, the improvement comprising: said ignition transfer body having an ignition transfer charge delimiting said clear ignition passage, said ignition transfer charge being composed of a high energy first propellant-charge powder generating thermal energy in a range from 3 kJ/g to 4.5 kJ/g; and a coaxial supporting tube encasing said ignition transfer charge, said supporting tube being composed of a second propellant-charge powder.
Claim 15
Dependent Claim
103 words
A propellant-charge module of the type including an envelope having a longitudinal axis and containing a propellant-charge powder, and a tubular ignition body supported within the envelope disposed coaxially about the longitudinal axis and having a longitudinally oriented clear ignition passage, the improvement comprising: said ignition transfer body having an ignition transfer charge delimiting said clear ignition passage, said ignition transfer charge being composed of a high energy first propellant-charge powder generating thermal energy in a range from 3 kJ/g to 4.5 kJ/g; and a coaxial supporting tube encasing said ignition transfer charge, said supporting tube being composed of a second propellant-charge powder.
Claim 16
Dependent Claim
24 words
A propellant-charge module as defined in claim 13, wherein said second propellant-charge powder composing said supporting tube is in the form of pressed powder.
Claim 17
Dependent Claim
27 words
A propellant-charge module as defined in claim 13, wherein said high energy first propellant-charge powder is composed of a mixture of nitrocellulose containing 20% to 50% nitroglycerin.
Claim 18
Dependent Claim
28 words
A propellant-charge module as defined in claim 13, wherein said ignition transfer charge comprises a preshaped tube which is fastened to an inner wall of said supporting tube.
Claim 19
Dependent Claim
47 words
A propellant-charge module as defined in claim 13, wherein said ignition transfer charge is a solid cylindrical body having a plurality of clear ignition channels which are disposed generally parallel to said axis, said ignition transfer charge being fastened to an interior wall of said supporting tube.
Claim 20
Dependent Claim
23 words
A propellant-charge module as defined in claim 13, wherein said supporting tube and said ignition transfer charge comprise a single jointly extruded tube.
Claim 21
Dependent Claim
26 words
A propellant-charge module as defined in claim 13, wherein said ignition transfer charge comprises a coating substantially entirely covering an interior wall of said supporting tube.
Claim 22
Dependent Claim
37 words
A propellant-charge module as defined in claim 13, wherein said ignition transfer charge comprises a thin sheet formed into a tube-shaped body which is fastened to an interior wall of said supporting tube by an attaching means.
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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |