US4003313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projectile
Assignee: United States Department of the Army
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Filing: 1975-06-10
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Granted: 1977-01-18
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Expires: 1995-06-10
Abstract
Abstract A projectile having a conical wall interconnecting a rearwardly opening ptechnic cavity and the base of the projectile that is located substantially at the rearward peripheral or sidewall surface of the projectile. The discharging gases from the relatively small pyrotechnic will exit along the conical wall of the launched spinning projectile and minimize the base drag effect of the environmental air stream during projectile flight.
Inventors
- 👤 Walter J. Puchalski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:45
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/38; F42B10/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A projectile comprising, a projectile main body having a forward nose portion secured to said main body, a substantially cylindrical peripheral wall portion, and a rearwardly opening cavity containing a pyrotechnic composition, said cavity having a substantially cylindrical sidewall, said cavity sidewall having a diameter substantially smaller than that of said peripheral wall portion, and a rearward portion of said projectile having means including an uninterrupted conical surface for interconnecting the rearmost surfaces of said main body and cavity sidewall, said uninterrupted conical surface defining an empty frusto-conical chamber rearward of said pyrotechnic composition.
Claim 2
Dependent Claim
94 words
A projectile comprising, a projectile main body having a forward nose portion secured to said main body, a substantially cylindrical peripheral wall portion, and a rearwardly opening cavity containing a pyrotechnic composition, said cavity having a substantially cylindrical sidewall, said cavity sidewall having a diameter substantially smaller than that of said peripheral wall portion, and a rearward portion of said projectile having means including an uninterrupted conical surface for interconnecting the rearmost surfaces of said main body and cavity sidewall, said uninterrupted conical surface defining an empty frusto-conical chamber rearward of said pyrotechnic composition.
Claim 3
Dependent Claim
26 words
The structure in accordance with claim 1 wherein the longitudinal distance between said rearmost surfaces is substantially greater than the longitudinal length of said cavity sidewall.
Claim 4
Dependent Claim
29 words
The structure according to claim 1 wherein said conical surface extends from the rearmost edge of said cavity sidewall to the base of said projectile adjacent said cylindrical sidewall.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |