Patent US4365555A successfully refreshed from Google Patents.
US4365555A
Expired / Lapsed
US
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Explosive priming device
Assignee: BERFI SpA
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Filing: 1980-07-02
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Granted: 1982-12-28
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Expires: 2000-07-02
Abstract
Abstract The invention relates to a priming device for explosive projectiles and explosive chains, comprising a casing (10), provided with a through hole (11) in which a percussion pin (12) is slidably positioned, and a die member (22), removably mounted to the casing, in which an explosion chamber (21) of frusto-conical shape and with blind bottom is provided, longitudinal slots (25) and other ducts (27, 28) permitting the explosion gases, as generated by a caseless explosive pill (20), to be conveyed to a main explosive charge.
Inventors
- 👤 Giovanni Galluzzi
- 👤 Giulio Fiocchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:52
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/0838; F42C19/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
Explosive priming device, comprising a pill of explosive material, which covers the open end of a frusto-conical, blind bottomed explosion chamber, and a percussion pin adapted to strike said pill at the side opposite with respect to said explosion chamber, including a casing having a through hole, said percussion pin being slidably located at one end of said through hole, without possibility of coming out therefrom, a die member removably mounted at the other end of said through hole, said explosion chamber being formed in the end of said die member which is more internal with respect to said through hole, and said die member being provided with channels by which said explosion chamber communicates with an axial duct, formed in said die member and leading outwardly.
Claim 2
Dependent Claim
127 words
Explosive priming device, comprising a pill of explosive material, which covers the open end of a frusto-conical, blind bottomed explosion chamber, and a percussion pin adapted to strike said pill at the side opposite with respect to said explosion chamber, including a casing having a through hole, said percussion pin being slidably located at one end of said through hole, without possibility of coming out therefrom, a die member removably mounted at the other end of said through hole, said explosion chamber being formed in the end of said die member which is more internal with respect to said through hole, and said die member being provided with channels by which said explosion chamber communicates with an axial duct, formed in said die member and leading outwardly.
Claim 3
Dependent Claim
33 words
Explosive priming device according to claim 1, wherein: said through hole is provided, from one end to the other, with sections having increasing diameter, which are connected by frusto-conical parts or stepped parts.
Claim 4
Dependent Claim
38 words
Explosive priming device according to claim 2 wherein: said die member is screwed in the section of greatest diameter of said through hole, so as to lock said explosive pill against the internal end of said percussion pin.
Claim 5
Dependent Claim
61 words
Explosive priming device according to claim 1, wherein: peripheral longitudinal slots are provided in said die member, which communicate at one end with radial channels, starting from said explosive pill, and at the other end with a transverse duct, an axial duct leading from the center of the transverse duct to outwardly convey the explosion gases generated by the said pill.
Claim 6
Dependent Claim
30 words
Explosive priming device according to claim 1, wherein: the outer end of said axial duct is of polygonally shaped cross section, for the insertion of a screwing and unscrewing wrench.
References Cited (Backward Citations)
US679792A
Cited
US2853007A
Cited
US3994235A
Cited
GB1474104A
Cited
US4027592A
Cited
GB2009373B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |