Patent US3713388A successfully refreshed from Google Patents.
US3713388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projectile for smooth barrel hunting guns or rifles with auxiliary wad provided with helical side tabs
Assignee: Individual
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Filing: 1970-10-28
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Granted: 1973-01-30
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Expires: 1990-10-28
Abstract
Abstract The invention concerns a projectile for smooth barrel hunting guns or rifles. The projectile is inserted into a cartridge housing the charge, the priming system and sealing wad of limited thickness. The projectile comprises a substantially spherical body made of lead or other suitable material and is provided in its lower section with a flat chamfered base. The spherical projectile includes an internal cavity connected to an auxiliary wad, cylindrical in shape and containing helical tabs formed by grooves. The diameter of the projectile and the auxiliary wad correspond to the internal diameter of the cartridge which houses the projectile.
Inventors
- 👤 E Pontoriero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:35
CPC Classifications
F; F42; F42B; F42B7/00; F42B7/02; F42B7/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A projectile system for smooth bore firearms, comprising: a cartridge housing, charging, priming and sealing means; a projectile substantially spherical in configuration terminating at the bottom in a flat chamfered base and including an internal cavity; a detachable vane member including at an end thereof means disposed within said cavity of said projectile for releaseably attaching said projectile and vane member, said vane member being generally cylindrical in configuration and including helical grooves in the surface thereof defining outwardly helical tabs against which the air strikes to impart rotational movement to said projectile and sAid vane member and to release said projectile from said vane member; said sealing means including a wad disposed rearwardly of said vane member.
Claim 2
Dependent Claim
118 words
A projectile system for smooth bore firearms, comprising: a cartridge housing, charging, priming and sealing means; a projectile substantially spherical in configuration terminating at the bottom in a flat chamfered base and including an internal cavity; a detachable vane member including at an end thereof means disposed within said cavity of said projectile for releaseably attaching said projectile and vane member, said vane member being generally cylindrical in configuration and including helical grooves in the surface thereof defining outwardly helical tabs against which the air strikes to impart rotational movement to said projectile and sAid vane member and to release said projectile from said vane member; said sealing means including a wad disposed rearwardly of said vane member.
Claim 3
Dependent Claim
118 words
A projectile system for smooth bore firearms, comprising: a cartridge housing, charging, priming and sealing means; a projectile substantially spherical in configuration terminating at the bottom in a flat chamfered base and including an internal cavity; a detachable vane member including at an end thereof means disposed within said cavity of said projectile for releaseably attaching said projectile and vane member, said vane member being generally cylindrical in configuration and including helical grooves in the surface thereof defining outwardly helical tabs against which the air strikes to impart rotational movement to said projectile and sAid vane member and to release said projectile from said vane member; said sealing means including a wad disposed rearwardly of said vane member.
Claim 4
Dependent Claim
118 words
A projectile system for smooth bore firearms, comprising: a cartridge housing, charging, priming and sealing means; a projectile substantially spherical in configuration terminating at the bottom in a flat chamfered base and including an internal cavity; a detachable vane member including at an end thereof means disposed within said cavity of said projectile for releaseably attaching said projectile and vane member, said vane member being generally cylindrical in configuration and including helical grooves in the surface thereof defining outwardly helical tabs against which the air strikes to impart rotational movement to said projectile and sAid vane member and to release said projectile from said vane member; said sealing means including a wad disposed rearwardly of said vane member.
Claim 5
Dependent Claim
29 words
A projectile system as in claim 1, said cavity within said projectile being substantially frusto-conical in configuration while said upper portion of said vane member includes an axial tang.
Claim 6
Dependent Claim
13 words
A projectile system as in claim 1, said vane member being plastic material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |