US3365787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making metal honeycomb sandwich structure
Assignee: Hexcel Corp
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Filing: 1963-06-19
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Granted: 1968-01-30
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Expires: 1983-06-19
Abstract
No abstract record available.
Inventors
- 👤 Richard P Forsberg
- 👤 William K Halnan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:52
CPC Classifications
B; B21; B21D; B21D47/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A METHOD OF FORMING A COMPOSITE STRUCTURE HAVING A METAL HONEYCOMB CORE COMPONENT ENCLOSED WITHIN TWO METAL OUTER SURFACE SHEET COMPONENTS COMPRISING THE STEPS OF: DEPOSITING ON THE EDGES OF THE CORE COMPONENT CELL WALLS AN INTERFACE METAL DISSIMILAR TO THE METAL OF EITHER THE CORE OR SURFACE SHEET COMPONENTS AND HAVING A YIELD STRENGTH AT ELEVATED TEMPERATURES LOWER THAN THAT OF SAID CORE COMPONENT AND OF A THICKNESS AT LEAST AS GREAT AS THE TOLERANCE OF THE SURFACE OF THE CORE COMPONENT; PLACING SAID HONEYCOMB CORE COMPONENT BETWEEN SAID TWO OUTER SURFACE SHEET COMPONENTS IN CONTACTING RELATIONSHIP; ELEVATING THE TEMPERATURE OF THE COMPONENTS; APPLYING TO THE SURFACE OF THE ASSEMBLED COMPONENTS COMPRESSIONAL FORCE LESS THAN THAT WHICH WILL PERMANENTLY DEFORM THE CORE COMPONENT; AND APPLYING HEAT AND PRESSURE TO COMPRESS SAID INTERFACE METAL AT ELEVATED REGIONS OF THE CORE SURFACE AND TO JOIN THE CORE AND THE SURFACE SHEET COMPONENTS ALONG THE ENTIRE INTERFACE THREEBETWEEN.
Claim 2
Independent Claim
156 words
A METHOD OF FORMING A COMPOSITE STRUCTURE HAVING A METAL HONEYCOMB CORE COMPONENT ENCLOSED WITHIN TWO METAL OUTER SURFACE SHEET COMPONENTS COMPRISING THE STEPS OF: DEPOSITING ON THE EDGES OF THE CORE COMPONENT CELL WALLS AN INTERFACE METAL DISSIMILAR TO THE METAL OF EITHER THE CORE OR SURFACE SHEET COMPONENTS AND HAVING A YIELD STRENGTH AT ELEVATED TEMPERATURES LOWER THAN THAT OF SAID CORE COMPONENT AND OF A THICKNESS AT LEAST AS GREAT AS THE TOLERANCE OF THE SURFACE OF THE CORE COMPONENT; PLACING SAID HONEYCOMB CORE COMPONENT BETWEEN SAID TWO OUTER SURFACE SHEET COMPONENTS IN CONTACTING RELATIONSHIP; ELEVATING THE TEMPERATURE OF THE COMPONENTS; APPLYING TO THE SURFACE OF THE ASSEMBLED COMPONENTS COMPRESSIONAL FORCE LESS THAN THAT WHICH WILL PERMANENTLY DEFORM THE CORE COMPONENT; AND APPLYING HEAT AND PRESSURE TO COMPRESS SAID INTERFACE METAL AT ELEVATED REGIONS OF THE CORE SURFACE AND TO JOIN THE CORE AND THE SURFACE SHEET COMPONENTS ALONG THE ENTIRE INTERFACE THREEBETWEEN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |