US3726224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluted liners for shaped charges
Assignee: United States Department of the Army
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Filing: 1950-08-23
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Granted: 1973-04-10
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Expires: 1970-08-23
Abstract
Abstract 1. In a spin stabilized shaped charge projectile, a hollow cylindrical casing, means closing the rear end of said casing and a driving band secured thereabout, a high explosive charge filling said casing and having a generally conical cavity in its forward end, a generally conical liner contiguous with said cavity and closing the forward end of said casing, there being a plurality of circumferentially spaced identical flutes on and integral with the walls of said liner, each said flute comprising a generally radially offset surface and a canted surface merging into the next adjacent offset surface, said offset surface facing in the direction of rotation of said projectile, each said offset surface lying in a plane making an angle theta with its respective radial plane and parallel with the axis of said liner.
Inventors
- 👤 E Pugh
- 👤 R Eichelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:51
CPC Classifications
F; F42; F42B; F42B1/00; F42B1/02; F42B1/028
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
In a spin stabilized shaped charge projectile, a hollow cylindrical casing, means closing the rear end of said casing and a driving band secured thereabout, a high explosive charge filling said casing and having a generally conical cavity in its forward end, a generally conical liner contiguous with said cavity and closing the forward end of said casing, there being a plurality of circumferentially spaced identical flutes on and integral with the walls of said liner, each said flute comprising a generally radially offset surface and a canted surface merging into the next adjacent offset surface, said offset surface facing in the direction of rotation of said projectile, each said offset surface lying in a plane making an angle theta with its respective radial plane and parallel with the axis of said liner.
Claim 2
Dependent Claim
133 words
In a spin stabilized shaped charge projectile, a hollow cylindrical casing, means closing the rear end of said casing and a driving band secured thereabout, a high explosive charge filling said casing and having a generally conical cavity in its forward end, a generally conical liner contiguous with said cavity and closing the forward end of said casing, there being a plurality of circumferentially spaced identical flutes on and integral with the walls of said liner, each said flute comprising a generally radially offset surface and a canted surface merging into the next adjacent offset surface, said offset surface facing in the direction of rotation of said projectile, each said offset surface lying in a plane making an angle theta with its respective radial plane and parallel with the axis of said liner.
Claim 3
Dependent Claim
56 words
The combination recited in claim 1, each said flute comprising a radially offset surface having a depth varying linearly with distance from the apex of said liner, the line formed by said canted surface and contingent offset surface forming a sharp edge at the base of said liner which is gradually rounded from base to apex.
Claim 4
Dependent Claim
126 words
In a shaped-charge spin-stabilized projectile having a hollow cylindrical casing, a high explosive charge in said casing having a generally conical cavity in its forward end, a generally conical liner contiguous with said cavity and closing the forward end of said casing, said liner having a fluted surface from the apex to the base thereof in contact with said explosive, each of said flutes comprising a short, generally radial abrupt offset surface adjoining a longer canted surface, said abrupt offset surfaces facing in the direction of rotation of said projectile to nullify the effect of said rotation on said liner by diverting a portion of the energy of said charge into a rotational impulse on said liner opposite in direction to the spin of said projectile.
Claim 5
Dependent Claim
126 words
In a shaped-charge spin-stabilized projectile having a hollow cylindrical casing, a high explosive charge in said casing having a generally conical cavity in its forward end, a generally conical liner contiguous with said cavity and closing the forward end of said casing, said liner having a fluted surface from the apex to the base thereof in contact with said explosive, each of said flutes comprising a short, generally radial abrupt offset surface adjoining a longer canted surface, said abrupt offset surfaces facing in the direction of rotation of said projectile to nullify the effect of said rotation on said liner by diverting a portion of the energy of said charge into a rotational impulse on said liner opposite in direction to the spin of said projectile.
Claim 6
Dependent Claim
145 words
In a spin-stabilized projectile having a hollow cylindrical casing, means on said projectile for imparting spin to said casing, a high explosive charge in said casing having a generally conical cavity in its forward end, a generally conical liner contiguous with said cavity and closing the forward end of said casing, the surface of said liner in contact with the charge being provided with a series of similar short offset surfaces oriented along generally radial planes extending from the apex to the base of said liner, each of said offset surfaces facing in the direction of spin of said projectile and joined to the next succeeding offset surface by a relatively long gently canted surface, the configuration of said liner diverting a portion of the energy of the charge into a rotational impulse on said liner opposite in direction to the spin of said casing.
Claim 7
Dependent Claim
145 words
In a spin-stabilized projectile having a hollow cylindrical casing, means on said projectile for imparting spin to said casing, a high explosive charge in said casing having a generally conical cavity in its forward end, a generally conical liner contiguous with said cavity and closing the forward end of said casing, the surface of said liner in contact with the charge being provided with a series of similar short offset surfaces oriented along generally radial planes extending from the apex to the base of said liner, each of said offset surfaces facing in the direction of spin of said projectile and joined to the next succeeding offset surface by a relatively long gently canted surface, the configuration of said liner diverting a portion of the energy of the charge into a rotational impulse on said liner opposite in direction to the spin of said casing.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |