Patent US3760731A successfully refreshed from Google Patents.
US3760731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infantry projectile
Assignee: United States Department of the Army
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Filing: 1971-10-28
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Granted: 1973-09-25
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Expires: 1991-10-28
Abstract
Abstract A supersonic high explosive anti-tank projectile capable of being launched from a tube by individual personnel including, at its forward end, stand-off means joined to a generally conical high explosive portion having its apex directed rearwardly. A boom of reduced cross-sectional area, extending rearwardly, affixed to the apex of the high explosive portion and carrying at the opposite end thereof a converging/diverging nozzle of circular cross section and provided with a plurality of radially extending fins, intermediate its ends, of a diameter equal to that of said conical portion. A plurality of stick shaped propellant charges supported by a step shaped means disposed about said conical portion. The sticks being supported only about said conical section intermediate the nozzle and the conical portion and filling this volume. A combustible casing surrounding the propellant sticks and extending approximately between the conical portion and a blowout disc closing the open end space between the outer periphery of the nozzle and the casing.
Inventors
- 👤 G Gaughan
- 👤 E Buchanan
- 👤 E Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:43
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/04; F42B12/10; F42B15/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
165 words
A high explosive projectile, adapted to be launched from an open-ended launch tube, comprising: a large diameter forward high explosive portion adapted to slidingly fit within said launch tube, a rear bob-like inverted nozzle member having a maximum diameter substantially smaller than said forward portion, an elongated boom having a diameter substantially smaller than said nozzle member rigidly affixed to and intermediate said forward portion and said nozzle member, a plurality of elongated propellant sticks extending lengthwise of and surrounding said boom, means carried by said forward portion for individually supporting said sticks, a combustible casing attached to said forward portion and surrounding said boom, propellant sticks and said nozzle member, said casing having a diameter substantially equal to forward portion, a releasable blowout disc closing the opening between said nozzle member and said casing, and an igniter assembly located between said disc and said propellant sticks, for igniting the latter to launch said projectile, whereby said projectile may be launched with a maximum velocity.
Claim 2
Dependent Claim
165 words
A high explosive projectile, adapted to be launched from an open-ended launch tube, comprising: a large diameter forward high explosive portion adapted to slidingly fit within said launch tube, a rear bob-like inverted nozzle member having a maximum diameter substantially smaller than said forward portion, an elongated boom having a diameter substantially smaller than said nozzle member rigidly affixed to and intermediate said forward portion and said nozzle member, a plurality of elongated propellant sticks extending lengthwise of and surrounding said boom, means carried by said forward portion for individually supporting said sticks, a combustible casing attached to said forward portion and surrounding said boom, propellant sticks and said nozzle member, said casing having a diameter substantially equal to forward portion, a releasable blowout disc closing the opening between said nozzle member and said casing, and an igniter assembly located between said disc and said propellant sticks, for igniting the latter to launch said projectile, whereby said projectile may be launched with a maximum velocity.
Claim 3
Dependent Claim
19 words
The projectile according to claim 1 wherein said sticks substantially fill the chamber between said boom and said casing.
Claim 4
Dependent Claim
25 words
The projectile according to claim 2 wherein said nozzle member peripheral surface is axially symmetrical and in a rearward direction first diverges and then converges.
Claim 5
Dependent Claim
19 words
The projectile according to claim 3 further including a multiplicity of radially extending stabilizing fins carried by said boom.
Claim 6
Dependent Claim
20 words
The projectile according to claim 4 wherein said projectile is circular in cross section and said forward portion converges rearwardly.
Claim 7
Dependent Claim
39 words
The projectile according to claim 5 wherein said means for supporting includes hooks carried and disposed circularly about the converging section of said forward portion, and, studs affixed to the ends of said sticks having apertures engaging said hooks.
Claim 8
Dependent Claim
18 words
The projectile according to claim 6 wherein the said hooks are carried by bands encircling said converging section.
Claim 9
Dependent Claim
24 words
The projectile according to claim 7 wherein said forward portion includes a shaped high explosive charge having a fuze assembly for detonating said charge.
Claim 10
Dependent Claim
28 words
The projectile according to claim 8 further including initiator means comprising standoff means for selectively activating said fuze assembly upon impact of said standoff means with a target.
Claim 11
Dependent Claim
23 words
The combination of the projectile according to claim 1 with a launch tube, open at both ends, in which said projectile slidingly fits.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |