US3607595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing aerodynamically smooth surfaces
Assignee: Dow Chemical Co
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Filing: 1966-05-31
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Granted: 1971-09-21
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Expires: 1986-05-31
Abstract
Abstract Aerodynamically smooth surfaces are prepared by covering an irregular surface such as a riveted aircraft wing with a flexible foam embedded with a thermosettable resin. The foam has a smooth outer layer of resin. Pressure is applied to the smooth outer layer of resin to deform the foam layer and cover the surface irregularities.
Inventors
- 👤 Leo J Windecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:37
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/26; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24512; Y10T428/24521; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
The method according to claim 1 wherein the irregular surface of said body is first coated with a film of a thermosettable resin to bond said plastic foam to said body.
Claim 2
Dependent Claim
23 words
The method of claim 1 wherein said flexible foam is an open-celled polyurethane foam and said thermosettable resin is a liquid epoxy resin.
Claim 3
Dependent Claim
68 words
A structure having an aerodynamically smooth surface comprising: a base member having minor surface irregularities thereon, a thin layer of a plastic foam adhered to the base member and embodying the surface irregularities, the foam layer comprising a flexible foam having a thin film of a thermoset resin coating the cellular surfaces of the foam, and a smooth layer of a thermoset resin adhered to the foam layer.
Claim 4
Dependent Claim
25 words
The structure of claim 1 wherein the plastic foam is an open-celled polyurethane foam and the thermoset resin coating the foam is an epoxy resin.
Claim 5
Independent Claim
90 words
A method of producing an aerodynamically smooth surface on an aircraft surface having surface irregularities, the steps of the method comprising covering the aircraft surface with a layer of a flexible plastic foam having its cellular surfaces wetted with a thin film of thermosettable resin, the foam layer having a smooth outer layer of resin applied thereto, applying pressure to the smooth outer layer of resin sufficient to deform the foam layer and embody the irregularities therein and mAintaining the pressure until the resin in the flexible foam is thermoset.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |