US4336090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making sandwich panel
Assignee: Boeing Co
•
Filing: 1980-06-30
•
Granted: 1982-06-22
•
Expires: 2000-06-30
Abstract
Abstract Method of manufacturing a sandwich assembly, e.g. an aluminum honeycomb sandwich assembly such as an inboard slat trailing edge for use in an aircraft wherein the spar cap spacing accuracy is retained through break-away tooling, e.g. a strip of low density core machined to the leading edge contour of the honeycomb core during core manufacture.
Inventors
- 👤 R. John Hilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:18
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B32B2250/00; B32B2250/40; B32B2605/00; B32B2605/18; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1003; Y10T156/1052; Y10T156/108; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
In the method of fabricating a honeycomb sandwich panel assembly having a pair of face sheets with a honeycomb core therebetween, said method including the steps of: providing a core blank having a higher density core permanently attached to a lower density core; temporarily fastening a further low density honeycomb core to said high density core; machining said core blank and said further honeycomb core to a desired height; providing a pair of face sheets; attaching separator film to upper and lower surfaces of said further honeycomb core; applying adhesive to said face sheets prior to assembling and curing said sandwich assembly; and, then removing said further honeycomb core from said assembled and cured sandwich assembly.
Claim 2
Dependent Claim
116 words
In the method of fabricating a honeycomb sandwich panel assembly having a pair of face sheets with a honeycomb core therebetween, said method including the steps of: providing a core blank having a higher density core permanently attached to a lower density core; temporarily fastening a further low density honeycomb core to said high density core; machining said core blank and said further honeycomb core to a desired height; providing a pair of face sheets; attaching separator film to upper and lower surfaces of said further honeycomb core; applying adhesive to said face sheets prior to assembling and curing said sandwich assembly; and, then removing said further honeycomb core from said assembled and cured sandwich assembly.
References Cited (Backward Citations)
US3060561A
Cited
US3064345A
Cited
US3407110A
Cited
US3413708A
Cited
US3566493A
Cited
US3740301A
Cited
US4284443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |