Patent US4338862A successfully refreshed from Google Patents.
US4338862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bullet nose filler for improved lethality
Assignee: United States Department of the Army
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Filing: 1975-10-03
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Granted: 1982-07-13
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Expires: 1995-10-03
Abstract
Abstract Small arms projectile wherein lead core thereof has its front or nose portion replaced with a structurally integral low-density plastic filler material, the filler material shearing from the lead core to provide a double wound tract upon slight penetration of the projectile into a soft target.
Inventors
- 👤 Richard Kwatnoski
- 👤 Robert J. McHugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:07
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/72; F42B12/76; F42B12/78
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
In a small arms cartridge, said cartridge having a case wall and a propellant therewithin; a head portion including means for igniting said propellant, the combination therewith of a projectile for increasing lethality of said projectile against soft targets by tumbling of said projectile therewithin substantially sooner than standard lead core and tracer bullets fired from similar cartridges and distances, a hollow metal jacket having a closed tip end, a structurally integral nose filler contained within a forward portion of said jacket, said nose filler comprising a thermoplastic resin having a specific gravity ranging between about 0.95 and 1.02 gm/cc, and about 20 to 40% of the length of said projectile, a heavy metal core within said jacket rearwardly adjacent said nose filler, said projectile forming a double wound tract in said soft target when said nose filler shears from said heavy metal core upon slight penetration of said projectile into said soft target.
Claim 2
Dependent Claim
154 words
In a small arms cartridge, said cartridge having a case wall and a propellant therewithin; a head portion including means for igniting said propellant, the combination therewith of a projectile for increasing lethality of said projectile against soft targets by tumbling of said projectile therewithin substantially sooner than standard lead core and tracer bullets fired from similar cartridges and distances, a hollow metal jacket having a closed tip end, a structurally integral nose filler contained within a forward portion of said jacket, said nose filler comprising a thermoplastic resin having a specific gravity ranging between about 0.95 and 1.02 gm/cc, and about 20 to 40% of the length of said projectile, a heavy metal core within said jacket rearwardly adjacent said nose filler, said projectile forming a double wound tract in said soft target when said nose filler shears from said heavy metal core upon slight penetration of said projectile into said soft target.
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) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |