US3880083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bimetallic mass stabilized flechette
Assignee: United States Department of the Army
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Filing: 1967-05-19
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Granted: 1975-04-29
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Expires: 1987-05-19
Abstract
Abstract A mass stabilized flechette including a forward solid coneshaped portion comprising most of the total weight of the flechette, made of a relatively heavy alloy, and a rearward solid body portion made of a relatively light material such as aluminum, beryllium or the like.
Inventors
- 👤 Saul Wasserman
- 👤 Robert S Salzman
- 👤 Walter C O'keefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:13
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/02; F42B10/04; F42B10/06; F42B10/08; Y; Y10; Y10S; Y10S102/00; Y10S102/703
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A mass stabilized flechette for employment in warheads and explosive launch ejection systems comprising a forward solid cone-shaped portion comprised of a base and nose portion, said base portion defining a hollow receptacle, a rearward solid body portion having a forward and rearward end, said forward end having an integral member which is axially aligned with and adapted to be inserted and secured in said hollow receptacle, said cone-shaped portion comprising about 86% of the total weight of the flechette, said body portion being 2.77 calibers in length which in conjunction with said cone-shaped portion results in a rearward aerodynamic center of pressure.
Claim 2
Dependent Claim
103 words
A mass stabilized flechette for employment in warheads and explosive launch ejection systems comprising a forward solid cone-shaped portion comprised of a base and nose portion, said base portion defining a hollow receptacle, a rearward solid body portion having a forward and rearward end, said forward end having an integral member which is axially aligned with and adapted to be inserted and secured in said hollow receptacle, said cone-shaped portion comprising about 86% of the total weight of the flechette, said body portion being 2.77 calibers in length which in conjunction with said cone-shaped portion results in a rearward aerodynamic center of pressure.
Claim 3
Dependent Claim
33 words
A flechette of the type described in claim 1 wherein said cone-shaped portion is made of a high density material to provide the center of gravity forward of the aerodynamic center of pressure.
Claim 4
Dependent Claim
19 words
A flechette of the type described in claim 2 wherein said cone portion is made of an uranium alloy.
Claim 5
Dependent Claim
37 words
A flechette of the type described in claim 1 wherein said body portion is made of a low density high strength material to provide aerodynamic stability and to be able to withstand the shock of explosive ejection.
Claim 6
Dependent Claim
27 words
A flechette of the type described in claim 4 wherein said body portion is made of a material selected from the group consisting of aluminum and beryllium.
Claim 7
Dependent Claim
20 words
A flechette of the type described in claim 1 wherein the cross sectional shape of the body portion is hexagonal.
Claim 8
Dependent Claim
16 words
A flechette of the type described in claim 1 wherein said cone has a blunted nose.
Claim 9
Dependent Claim
25 words
A flechette of the type described in claim 1 wherein said cone portion and body portion are bonded together in axial alignment with an epoxy.
Claim 10
Dependent Claim
20 words
A flechette of the type described in claim 1 wherein the cross sectional shape of the body portion is circular.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |