Patent US3742673A successfully refreshed from Google Patents.
US3742673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel edge fastening means
Assignee: Fairchild Industries Inc
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Filing: 1971-03-22
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Granted: 1973-07-03
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Expires: 1991-03-22
Abstract
Abstract A number of panel edge fasteners for lightweight sandwich panels are adjustably mounted along a channel member and the member is inserted into and closes out the open panel edge. A pair of holes in the overlying panel skins is aligned with each selectively positioned fastener, and a pair of plugs pressed into recesses in the fastener clamps the panel skins therebetween. Void space between the lightweight panel core and the channel and attached fasteners may be filled with a foam adhesive.
Inventors
- 👤 P Jennings
- 👤 D Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:33
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/01
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
Apparatus for mounting fasteners in a sandwich panel having a low density core between thin outer skin sheets comprising, a channel member adapted to be inserted in the edge of the panel between the inner surfaces of said skin sheets and to close-out the panel edge, fasteners slidably mounted on said channel member for variable spacing therealong and adapted to be inserted with said member between the skin sheets into an open panel core area, and clamping means attached from without the panel to secure each fastener to at least one of said skin sheets.
Claim 2
Dependent Claim
95 words
Apparatus for mounting fasteners in a sandwich panel having a low density core between thin outer skin sheets comprising, a channel member adapted to be inserted in the edge of the panel between the inner surfaces of said skin sheets and to close-out the panel edge, fasteners slidably mounted on said channel member for variable spacing therealong and adapted to be inserted with said member between the skin sheets into an open panel core area, and clamping means attached from without the panel to secure each fastener to at least one of said skin sheets.
Claim 3
Dependent Claim
60 words
Apparatus as described in claim 1 wherein said fasteners are provided with recessed portions adjacent said skin sheets, said sheets are provided with openings concentric with and of lesser dimension than said recessed portions, and said clamping means comprises plugs adapted to be pressed into said recessed portions and to clamp the margins of the sheets defining said openings therebetween.
Claim 4
Dependent Claim
17 words
Apparatus as described in claim 2 wherein said recessed portions and said plugs are of circular form.
Claim 5
Dependent Claim
34 words
Apparatus as described in claim 3 wherein the skin contacting surfaces of said circular recessed portions and said plugs are frusto conical and inwardly convergent to effect a positive clamping of the skin therebetween.
Claim 6
Dependent Claim
34 words
Apparatus as described in claim 3 wherein each fastener is provided with two circular recessed portions such that plugs may be pressed into said recessed portions to secure each fastener to both skin sheets.
Claim 7
Dependent Claim
23 words
Apparatus as described in claim 5 wherein said fasteners and their corresponding plugs are concentrically through bored for receipt of panel attaching means.
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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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |