US4351240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incendiary fragmentary warhead
Assignee: United States Department of the Navy
•
Filing: 1975-02-28
•
Granted: 1982-09-28
•
Expires: 1995-02-28
Abstract
Abstract A warhead comprising an explosive charge surrounded by discrete individualetal fragments is increased in effectiveness by the addition of pyrophoric fragment material combined therewith. For this purpose, misch metal or zirconium-tin sleeves are placed around or within the fragmentation layers or, alternatively, a percentage of the ferrous metal cubes are replaced with a number of preformed zirconium fragments.
Inventors
- 👤 Melvin J. McCubbin
- 👤 Clifford T. Johnson
- 👤 Paul E. Cordle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:01
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/20; F42B12/22; F42B12/32; F42B12/36; F42B12/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
71 words
A fragmentation-incendiary warhead comprising, in combination; an explosive section having an axis of symmetry; a plurality of rows of generally cubical ferrous metal fragments arranged in a patterned array around said explosive section; and separate distinctly shaped pieces of solid zirconium of very nearly the same size and mass as said cubical steel fragments; said pieces being intermixed with said cubical fragments for dispersal therewith when said explosive section is detonated.
Claim 2
Dependent Claim
71 words
A fragmentation-incendiary warhead comprising, in combination; an explosive section having an axis of symmetry; a plurality of rows of generally cubical ferrous metal fragments arranged in a patterned array around said explosive section; and separate distinctly shaped pieces of solid zirconium of very nearly the same size and mass as said cubical steel fragments; said pieces being intermixed with said cubical fragments for dispersal therewith when said explosive section is detonated.
Claim 3
Dependent Claim
23 words
The warhead of claim 1 wherein said pieces of pyrophoric metal comprise from 2 to 12 percent of the total number of fragments.
References Cited (Backward Citations)
CA669449A
Cited
FR1177716A
Cited
US3518942A
Cited
US3474731A
Cited
US3498224A
Cited
US3830671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |