US4742776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cartridge projectile for smoothbore firearms
Assignee: Cervo SpA
•
Filing: 1987-04-15
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Granted: 1988-05-10
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Expires: 2007-04-15
Abstract
Abstract The invention relates to the art field of cartridges for conventional smoothbore shotguns used in hunting. A projectile is disclosed that consists in a hollow cylindrical leaden body the forward end of which is stopped by a dome reflexed back into the hollow body and exhibiting an external recess.
Inventors
- 👤 Antonio Scuto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:06
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/34; F42B10/00; F42B10/02; F42B10/22; F42B10/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
A cartridge projectile for smoothbore firearms comprising: a hollow cylindrical metal body; a front end of the body being closed by a concave dome reflexed partially into the hollow body and provided with an external recess whereby the projectile flattens after impact with a target; and said body having a plurality of externally disposed ribs extending obliquely from said body, said ribs having helical shape and extending from the front end to a rear end of the body.
Claim 2
Dependent Claim
78 words
A cartridge projectile for smoothbore firearms comprising: a hollow cylindrical metal body; a front end of the body being closed by a concave dome reflexed partially into the hollow body and provided with an external recess whereby the projectile flattens after impact with a target; and said body having a plurality of externally disposed ribs extending obliquely from said body, said ribs having helical shape and extending from the front end to a rear end of the body.
Claim 3
Dependent Claim
18 words
The cartridge projectile of claim 1, wherein the body presents along an axial section, a substantially uniform thickness.
Claim 4
Dependent Claim
21 words
The cartridge projectile of claim 1, wherein the dome presents a hemispherical configuration on the side projecting into the hollow body.
Claim 5
Dependent Claim
21 words
The cartridge projectile of claim 1, wherein the dome presents a frusto-conical configuration on the side projecting into the hollow body.
Claim 6
Dependent Claim
14 words
the cartridge projectile of claim 3, wherein the external recess has a frusto-conical shape.
Claim 7
Dependent Claim
14 words
The cartridge projectile of claim 4, wherein the external recess has a frusto-conical shape.
Claim 8
Dependent Claim
90 words
A cartridge projectile for smothbore firearms comprising: a hollow cylindrical metal body; a front end of the body being closed by a dome reflexed partially into the hollow body and provided with an external recess such that the projectile flattens after impact with a target; said body further including a plurality of externally disposed ribs extending obliquely from said body, said ribs having helical shape and extending from the front end to a rear end of said body; and said body presents along an axial section, a substantially uniform thickness.
Claim 9
Dependent Claim
90 words
A cartridge projectile for smothbore firearms comprising: a hollow cylindrical metal body; a front end of the body being closed by a dome reflexed partially into the hollow body and provided with an external recess such that the projectile flattens after impact with a target; said body further including a plurality of externally disposed ribs extending obliquely from said body, said ribs having helical shape and extending from the front end to a rear end of said body; and said body presents along an axial section, a substantially uniform thickness.
Claim 10
Dependent Claim
60 words
A cartridge projectile for smoothbore firearms comprising: a hollow cylindrical metal body; a front end of the body being closed by a dome reflexed partially into the hollow body and provided with an external recess, such that the projectile flattens after impact with a target; and said dome having a hemispherical configuration on the side projecting into the hollow body.
Claim 11
Dependent Claim
60 words
A cartridge projectile for smoothbore firearms comprising: a hollow cylindrical metal body; a front end of the body being closed by a dome reflexed partially into the hollow body and provided with an external recess, such that the projectile flattens after impact with a target; and said dome having a hemispherical configuration on the side projecting into the hollow body.
References Cited (Backward Citations)
US3138102A
Cited
US4413564A
Cited
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 |