US4742774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Small arms ammunition
Assignee: Individual
•
Filing: 1983-06-20
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Granted: 1988-05-10
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Expires: 2003-06-20
Abstract
Abstract Improved small arms ammunition comprising a conventional primed cartridge case and a hollow projectile in tubular geometric form is provided according to the present invention. In accordance with the teachings of this invention, the hollow projectile in tubular geometric form is characterized by a nose of circular cross-section expanding back to the main body of the projectile. The main body of the projectile includes a rotational band about at least a portion of the periphery thereof and is backed by a pusher disc and obturator to seal off the central core of the projectile so that propulsive force may be imparted thereto. The tubular projectile is lighter than its comparable conventional counterparts, exhibits gyroscopic stability and is capable of being fired at higher muzzle velocities and producing less recoil than that associated with conventional small arms ammunition while at the same time depositing a great amount of kinetic energy upon impacting the target.
Inventors
- 👤 Abraham Flatau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:01
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
197 words
Small arms ammunition consisting essentially of: primed cartridge case means; a substantially cylindrical hollow tubular projectile positioned in said cartridge case, said projectile having a main body portion and a nose portion having an aslantly disposed surface tapering down from said main body portion toward an annular leading edge. said leading edge having a diameter from 1/3 to 1/2 of the outer diameter of said substantially cylindrical hollow tubular projectile, an inner axial concentric passage through said hollow tubular projectile, said passage having substantially uniform inner diameter corresponding with said leading edge diameter, the length of said tubular projectile being between 1.5 to 1.75 times said outer diameter of said tubular projectile, said main body portion of said hollow tubular projectile means having rotational band means disposed about a peripheral portion thereof, a pusher/obturator means snugly fitted to said main body portion of said hollow tubular projectile having a rear portion thereof disposed within said primed cartridge case means, said obturator having a flat disc-like body with a peripheral flange leg portion extending circumferentially in the form of an H, and said pusher having a flat disc-like body seated between said flange legs of said obturator body.
Claim 2
Dependent Claim
197 words
Small arms ammunition consisting essentially of: primed cartridge case means; a substantially cylindrical hollow tubular projectile positioned in said cartridge case, said projectile having a main body portion and a nose portion having an aslantly disposed surface tapering down from said main body portion toward an annular leading edge. said leading edge having a diameter from 1/3 to 1/2 of the outer diameter of said substantially cylindrical hollow tubular projectile, an inner axial concentric passage through said hollow tubular projectile, said passage having substantially uniform inner diameter corresponding with said leading edge diameter, the length of said tubular projectile being between 1.5 to 1.75 times said outer diameter of said tubular projectile, said main body portion of said hollow tubular projectile means having rotational band means disposed about a peripheral portion thereof, a pusher/obturator means snugly fitted to said main body portion of said hollow tubular projectile having a rear portion thereof disposed within said primed cartridge case means, said obturator having a flat disc-like body with a peripheral flange leg portion extending circumferentially in the form of an H, and said pusher having a flat disc-like body seated between said flange legs of said obturator body.
Claim 3
Dependent Claim
194 words
Small arms ammunition consisting essentially of: primed cartridge case means; a substantially cylindrical hollow tubular projectile positioned in said cartridge case, said projectile having a main body portion and a nose portion having an aslantly disposed surface tapering down from said main body portion toward an annular leading edge. said leading edge having a diameter from 1/3 to 1/2 of the outer diameter of said substantially cylindrical hollow tubular projectile, an inner axial concentric passage through said hollow tubular projectile, said passage having substantially uniform inner diameter corresponding with said leading edge diameter, the length of said tubular projectile being 1.5 times said outer diameter of said tubular projectile, said main body portion of said hollow tubular projectile means having rotational band means disposed about a peripheral portion thereof, a pusher/obturator means snugly fitted to said main body portion of said hollow tubular projectile having a rear portion thereof disposed within said primed cartridge case means, said obturator having a flat disc-like body with a peripheral flange leg portion extending circumferentially in the form of an H, and said pusher having a flat disc-like body seated between said flange legs of said obturator body.
Claim 4
Dependent Claim
194 words
Small arms ammunition consisting essentially of: primed cartridge case means; a substantially cylindrical hollow tubular projectile positioned in said cartridge case, said projectile having a main body portion and a nose portion having an aslantly disposed surface tapering down from said main body portion toward an annular leading edge. said leading edge having a diameter from 1/3 to 1/2 of the outer diameter of said substantially cylindrical hollow tubular projectile, an inner axial concentric passage through said hollow tubular projectile, said passage having substantially uniform inner diameter corresponding with said leading edge diameter, the length of said tubular projectile being 1.5 times said outer diameter of said tubular projectile, said main body portion of said hollow tubular projectile means having rotational band means disposed about a peripheral portion thereof, a pusher/obturator means snugly fitted to said main body portion of said hollow tubular projectile having a rear portion thereof disposed within said primed cartridge case means, said obturator having a flat disc-like body with a peripheral flange leg portion extending circumferentially in the form of an H, and said pusher having a flat disc-like body seated between said flange legs of said obturator body.
Claim 5
Dependent Claim
194 words
Small arms ammunition consisting essentially of: primed cartridge case means; a substantially cylindrical hollow tubular projectile positioned in said cartridge case, said projectile having a main body portion and a nose portion having an aslantly disposed surface tapering down from said main body portion toward an annular leading edge. said leading edge having a diameter from 1/3 to 1/2 of the outer diameter of said substantially cylindrical hollow tubular projectile, an inner axial concentric passage through said hollow tubular projectile, said passage having substantially uniform inner diameter corresponding with said leading edge diameter, the length of said tubular projectile being 1.75 times said outer diameter of said tubular projectile, said main body portion of said hollow tubular projectile means having rotational band means disposed about a peripheral portion thereof, a pusher/obturator means snugly fitted to said main body portion of said hollow tubular projectile having a rear portion thereof disposed within said primed cartridge case means, said obturator having a flat disc-like body with a peripheral flange leg portion extending circumferentially in the form of an H, and said pusher having a flat disc-like body seated between said flange legs of said obturator body.
Claim 6
Dependent Claim
194 words
Small arms ammunition consisting essentially of: primed cartridge case means; a substantially cylindrical hollow tubular projectile positioned in said cartridge case, said projectile having a main body portion and a nose portion having an aslantly disposed surface tapering down from said main body portion toward an annular leading edge. said leading edge having a diameter from 1/3 to 1/2 of the outer diameter of said substantially cylindrical hollow tubular projectile, an inner axial concentric passage through said hollow tubular projectile, said passage having substantially uniform inner diameter corresponding with said leading edge diameter, the length of said tubular projectile being 1.75 times said outer diameter of said tubular projectile, said main body portion of said hollow tubular projectile means having rotational band means disposed about a peripheral portion thereof, a pusher/obturator means snugly fitted to said main body portion of said hollow tubular projectile having a rear portion thereof disposed within said primed cartridge case means, said obturator having a flat disc-like body with a peripheral flange leg portion extending circumferentially in the form of an H, and said pusher having a flat disc-like body seated between said flange legs of said obturator body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |