US3874855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite shock resisting bodies
Assignee: Cegedur GP
•
Filing: 1973-11-21
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Granted: 1975-04-01
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Expires: 1993-11-21
Abstract
Abstract A shock resisting composite product characterized by maximum resistance with minimum density formed from a wrought alloy of aluminum having cells formed therein which are packed with a hard material in a compact or fritted condition.
Inventors
- 👤 Robert Legrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:03
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; F41H5/0421; F41H5/0492; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12042; Y10T428/12063; Y10T428/12104; Y10T428/12486; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12736; Y10T428/12743; Y10T428/1275; Y10T428/31504; Y10T428/31511; Y10T428/31529
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
AN ARMOR PLATE COMPRISING A COMPOSITE PRODUCT CONSISTING OF A WROUGHT ALUMINUM ALLOY BODY, A PLURALITY OF CELLS DEFINED BY SAID BODY, AND A MATERIAL OF HIGH HARDNESS FILLING SAID CELLS SAID BODY PROVIDING A WALL PORTION SUBJECT TO IMPACT AND ADAPTED TO BE PIERCED WHILE ABSORBING A PORTION OF THE ENERGY OF THE IMPACT THE THICKNESS OF SAID WALL PORTION COMPRISING ABOUT 10 TO 30 PERCENT OF THE THICKNESS OF SAID BODY, SAID HARD MATERIAL AND THE REMAINDER OF SAID BODY ABSORBING THE BALANCE OF THE ENERGY OF THE IMPACT, SAID CELLS COMPRISING FROM 30 TO 50 PERCENT OF THE CROSS SECTIONAL AREA OF SAID BODY, AND SAID BODY DEFINING A THICK WALL PORTION OF THE SIDE OF SAID CELLS OPPOSITE SAID THIN WALL PORTION, THE THICKNESS OF SAID THICK WALL PORTION BEING FROM 40 TO 60 PERCENT OF THE THICKNESS OF SAID BODY.
Claim 2
Dependent Claim
145 words
AN ARMOR PLATE COMPRISING A COMPOSITE PRODUCT CONSISTING OF A WROUGHT ALUMINUM ALLOY BODY, A PLURALITY OF CELLS DEFINED BY SAID BODY, AND A MATERIAL OF HIGH HARDNESS FILLING SAID CELLS SAID BODY PROVIDING A WALL PORTION SUBJECT TO IMPACT AND ADAPTED TO BE PIERCED WHILE ABSORBING A PORTION OF THE ENERGY OF THE IMPACT THE THICKNESS OF SAID WALL PORTION COMPRISING ABOUT 10 TO 30 PERCENT OF THE THICKNESS OF SAID BODY, SAID HARD MATERIAL AND THE REMAINDER OF SAID BODY ABSORBING THE BALANCE OF THE ENERGY OF THE IMPACT, SAID CELLS COMPRISING FROM 30 TO 50 PERCENT OF THE CROSS SECTIONAL AREA OF SAID BODY, AND SAID BODY DEFINING A THICK WALL PORTION OF THE SIDE OF SAID CELLS OPPOSITE SAID THIN WALL PORTION, THE THICKNESS OF SAID THICK WALL PORTION BEING FROM 40 TO 60 PERCENT OF THE THICKNESS OF SAID BODY.
Claim 3
Dependent Claim
45 words
A construction in accordance with claim 1 wherein said hard material comprises at least one of the members selected from the group consisting of an alloy of cobalt, chromium and tungsten, the nitrides and carbides of boron, tungsten and vanadium, steel, silica, magnesia and corundum.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |