Patent US3937425A successfully refreshed from Google Patents.
US3937425A
Expired / Lapsed
US
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Airplane wing and method of forming same
Assignee: BERNSTEIN ACQUISITIONS Inc
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Filing: 1974-04-19
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Granted: 1976-02-10
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Expires: 1994-04-19
Abstract
Abstract A method of forming an airplane wing and a resulting article of manufacture where a wing structural member is provided which is composed of a plastic foam layer sandwiched between opposing paper sheets. A substantial portion of one of the paper sheets is removed from the plastic foam through application of water to pulpify one of the paper sheets and then stripping such from the plastic foam layer. The resulting structural member is then formed into a predetermined contour after compression of the foam layer in the leading edge region of the wing. Rib elements may be secured to an internal surface of the wing and the trailing edges are tapered prior to securement of the trailing wing edges throughout the wing extended length.
Inventors
- 👤 William B. Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:42
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/26; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
124 words
A method of forming an airplane wing including the steps of: a. providing a planar structural member composed of plastic foam between opposing paper sheets; b. removing a substantial portion of one of said paper sheets from said plastic foam to form an inner surface of said airplane wing composed of said plastic foam and said paper sheet; c. establishing a leading edge region of said wing extending a predetermined transverse distance with respect to a longitudinal extension of said structural member; d. compressing said leading edge region throughout said longitudinal extension of said planar structural member; e. shaping said structural member into a predetermined contour; and, f. securing opposing ends of said structural member each to the other to form said airplane wing.
Claim 2
Independent Claim
124 words
A method of forming an airplane wing including the steps of: a. providing a planar structural member composed of plastic foam between opposing paper sheets; b. removing a substantial portion of one of said paper sheets from said plastic foam to form an inner surface of said airplane wing composed of said plastic foam and said paper sheet; c. establishing a leading edge region of said wing extending a predetermined transverse distance with respect to a longitudinal extension of said structural member; d. compressing said leading edge region throughout said longitudinal extension of said planar structural member; e. shaping said structural member into a predetermined contour; and, f. securing opposing ends of said structural member each to the other to form said airplane wing.
Claim 3
Dependent Claim
33 words
The method of forming an airplane wing as recited in claim 1 where the step of providing a planar structural member includes the step of establishing a planar contour of said airplane wing.
Claim 4
Dependent Claim
37 words
The method of forming an airplane wing as recited in claim 2 where the step of establishing a planar contour is followed by the step of cutting said structural member to said contour of said airplane wing.
Claim 5
Dependent Claim
23 words
The method of forming an airplane wing as recited in claim 1 where said plastic foam is formed of open cell plastic foam.
Claim 6
Dependent Claim
23 words
The method of forming an airplane wing as recited in claim 4 where said paper sheets are formed of hard clay coating paper.
Claim 7
Dependent Claim
42 words
The method of forming an airplane wing as recited in claim 1 where the step of removing one of said paper sheets includes the step of frictionally engaging said paper sheet to be removed throughout a contour of said planar structural member.
Claim 8
Dependent Claim
33 words
The method of forming an airplane wing as recited in claim 6 where the step of frictionally engaging said paper sheet includes the step of milling said paper sheet from said plastic foam.
Claim 9
Dependent Claim
33 words
The method of forming an airplane wing as recited in claim 6 where the step of frictionally engaging said paper sheet includes the step of grinding said paper sheet from said plastic foam.
Claim 10
Dependent Claim
39 words
The method of forming an airplane wing as recited in claim 1 where the step of removing one of said paper sheets includes the step of applying water to a surface of at least one of said paper sheets.
Claim 11
Dependent Claim
35 words
The method of forming an airplane wing as recited in claim 9 where the step of applying water includes the step of providing heated water to be applied to said surface of said paper sheet.
Claim 12
Dependent Claim
33 words
The method of forming an airplane wing as recited in claim 10 where the step of applying water includes the step of sponging said heated water over said surface of said paper sheet.
Claim 13
Dependent Claim
34 words
The method of forming an airplane wing as recited in claim 10 where the step of applying water includes the step of rubbing said surface of said paper sheet with a water impregnated member.
Claim 14
Dependent Claim
36 words
The method of forming an airplane wing as recited in claim 12 where the step of rubbing includes the step of pulpifying at least a portion of said paper sheet having said heated water applied thereto.
Claim 15
Dependent Claim
35 words
The method of forming an airplane wing as recited in claim 13 where the step of pulpifying is followed by the step of stripping a substantial portion of said paper sheet from said plastic foam.
Claim 16
Dependent Claim
48 words
The method of forming an airplane wing as recited in claim 1 where the step of compressing includes the step of applying pressure to said leading edge region on a surface of said structural member having said substantial portion of said paper sheet removed from said plastic foam.
Claim 17
Dependent Claim
31 words
The method of forming an airplane wing as recited in claim 15 where the step of applying pressure includes the step of compressing said plastic foam in said leading edge region.
Claim 18
Dependent Claim
52 words
The method of forming an airplane wing as recited in claim 16 where the step of compressing includes the step of bending said structural member around said leading edge region, said surface of said structural member having said substantial portion of said paper sheet removed forming an interior surface of said wing.
Claim 19
Dependent Claim
34 words
The method of forming an airplane wing as recited in claim 1 where the step of shaping said structural member is followed by the step of adding structural integrity to said formed structural member.
Claim 20
Dependent Claim
52 words
The method of forming an airplane wing as recited in claim 18 where the step of adding structural integrity includes the step of contouring at least one rib member for attachment to an internal surface of said structural member having a substantial portion of said paper sheet removed from said plastic foam.
Claim 21
Dependent Claim
40 words
The method of forming an airplane wing as recited in claim 1 where the step of securing opposing ends includes the step of tapering said opposing ends of said structural member to form a pair of longitudinally extending tapered edges.
Claim 22
Dependent Claim
35 words
The method of forming an airplane wing as recited in claim 20 where the step of tapering is followed by the step of fastening said tapered edges each to the other throughout said longitudinal extension.
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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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |