Patent US4043269A successfully refreshed from Google Patents.
US4043269A
Expired / Lapsed
US
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Sealed sabot projectile
Assignee: United States Department of the Army
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Filing: 1976-05-27
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Granted: 1977-08-23
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Expires: 1996-05-27
Abstract
Abstract A sealed sabot projectile wherein the rear centering ring of the sabot hasn opening to expose the projectile tracer material to the propulsion gases. This opening has a seal over it with a small aperture therein for controlled flow of gases to ignite the tracer material yet avoid premature separation of the projectile from the rear spin generating portion of the sabot. The resulting greater spin velocity of the projectile gives it greater accuracy.
Inventors
- 👤 Leonard R. Ambrosini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:35
CPC Classifications
F; F42; F42B; F42B14/00; F42B14/06; F42B14/064; F42B12/00; F42B12/02; F42B12/36; F42B12/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
A sealed sabot projectile comprising: a sabot having a cylindrical wall and a front face with an opening for insertion of the nose of a projectile therethrough, a centering ring threadedly engagable with said wall and adapted to align and retain a projectile within said sabot, said ring having an opening therein to permit propulsion gases to impinge against said projectile in the separation thereof from said sabot, and a seal within said opening having an orifice therein for controlled flow of propulsion gases therethrough, said seal including a semi-spherical cap overlying said ring opening and a long tubular protrusion fitting snugly within said opening, said orifice extending through said cap.
Claim 2
Dependent Claim
111 words
A sealed sabot projectile comprising: a sabot having a cylindrical wall and a front face with an opening for insertion of the nose of a projectile therethrough, a centering ring threadedly engagable with said wall and adapted to align and retain a projectile within said sabot, said ring having an opening therein to permit propulsion gases to impinge against said projectile in the separation thereof from said sabot, and a seal within said opening having an orifice therein for controlled flow of propulsion gases therethrough, said seal including a semi-spherical cap overlying said ring opening and a long tubular protrusion fitting snugly within said opening, said orifice extending through said cap.
Claim 3
Dependent Claim
34 words
A sealed sabot projectile as in claim 1 wherein a tracer cylinder is attached to the rear end of said projectile and tracer material therein is ignited by propulsion gases passing through said orifice.
Claim 4
Dependent Claim
18 words
A sealed sabot projectile as in claim 1, said orifice having a steel liner therein to eliminate burn-through.
Claim 5
Dependent Claim
27 words
A sealed sabot projectile as in claim 1 wherein said seal has a flat disc-like cover and a protrusion adapted to fit within said centering ring opening.
References Cited (Backward Citations)
GB432201A
Cited
FR1260881A
Cited
US3348485A
Cited
US3498222A
Cited
CH482167A
Cited
US3745926A
Cited
US3780658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |