Composite sandwich panel type construction
Abstract
Abstract A COMPOSITE SANDWICH PANEL TYPE CONSTRUCTION COMPRISING TWO INDEPENDENT OUTER LAYERS ATTACHED TO OPPOSITE SIDES OF FOAMED METAL CORE, SAID CORE HAVING Z-SHAPED REINFORCING ELEMENTS THEREIN. A PREFERRED PANEL CONSTRUCTION HAS ONE OUTER LAYER EXTENDING AROUND SAID FOAMED METAL CORE SO AS TO SUBSTATALLY ENCASE SAID CORE, METHODS OF FABRICATING SUCH A PANEL CONSTRUCTION (1) BY CASTING SAID FOAMED ALUMINUM AROUND SAID REINFORCING ELEMENTS AND SUBSEQUENTLY ATTACHING SAID OUTER LAYERS TO THIS INTERAL METAL FOAM/REINFORCING ELEMENT CORE STRUCTURE, AND (2) BY FIRST PREPARING SAID CORE FROM INDIVIDUAL METAL FOAM PIECES WHICH ARE THEN ATTACHED TO PERFORMED Z-SHAPED REINFORCING ELEMENTS, SAID ASSEMBLED CORE STRUCTURE THEN HAVING THE OUTER LAYERS ATTACHED THERETO. COMPARED TO THE COMPOSITE SANDWICH PANEL CONSTRUCTION HAVING NO Z-SHAPED REINFORCING ELEMENTS IN SAID CORE, THE PRESENT CONSTRUCTION HAS SUBSTANTIALLY IMPROVED STRENGTH.
Inventors
- 👤 L Niebylski
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |