US4000871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane fuselage structure
Assignee: Individual
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Filing: 1975-07-31
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Granted: 1977-01-04
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Expires: 1995-07-31
Abstract
Abstract An airplane fuselage of a type having a concave bottom for providing more lift and control at low speeds and with two strut members extending along and on each side of the concave bottom for providing skids for the purpose of emergency landings. The two bottom strut members are connected at the forward end thereof but are spaced apart at the rear end thereof to prevent an aircraft from turning to one side or the other due to direct contact with the ground or a body of water. A top and central strut member is also provided on the fuselage. Relatively short wings are attached to the fuselage portion, all parts of which are located above the two lower strut members. The landing gear is located in the wing structure.
Inventors
- 👤 Kermit M. DeHaai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:26
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/06; B64C1/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
155 words
An airplane body comprising: a longitudinally extending fuselage, said fuselage being substantially concave along the bottom thereof; a first strut member attached to said fuselage along one side of said concave bottom and extending substantially from the front of said fuselage to a point forward of the rear end of said fuselage; a second strut member attached to said fuselage along the other side of said concave bottom and extending substantially from the front of said fuselage to a point substantially forwardly of the rear end of said fuselage, said first and second strut members having ends terminating substantially forwardly of the rear end of said fuselage and being spaced apart by a substantial distance at said terminating ends, whereby said first and second struts form skid means for emergency landing purposes; a pair of wings attached to said fuselage; and a tail attached to said fuselage rearwardly of the first and second strut members.
Claim 2
Dependent Claim
155 words
An airplane body comprising: a longitudinally extending fuselage, said fuselage being substantially concave along the bottom thereof; a first strut member attached to said fuselage along one side of said concave bottom and extending substantially from the front of said fuselage to a point forward of the rear end of said fuselage; a second strut member attached to said fuselage along the other side of said concave bottom and extending substantially from the front of said fuselage to a point substantially forwardly of the rear end of said fuselage, said first and second strut members having ends terminating substantially forwardly of the rear end of said fuselage and being spaced apart by a substantial distance at said terminating ends, whereby said first and second struts form skid means for emergency landing purposes; a pair of wings attached to said fuselage; and a tail attached to said fuselage rearwardly of the first and second strut members.
Claim 3
Dependent Claim
21 words
The airplane body of claim 1 wherein said first and second strut members are connected together at the forward ends thereof.
Claim 4
Dependent Claim
25 words
The airplane body of claim 1 wherein the lowermost portion of said wings is substantially above the bottom of the first and second strut members.
Claim 5
Dependent Claim
23 words
The airplane body of claim 1 wherein a third strut member is attached to the fuselage and extends along the longitudinal top thereof.
Claim 6
Dependent Claim
24 words
The airplane body of claim 4 wherein said third strut member connects with the first and second strut members at the forward ends thereof.
Claim 7
Dependent Claim
20 words
The airplane body of claim 1 wherein said first and second strut members extend upwardly at the forward end thereof.
Claim 8
Dependent Claim
21 words
The airplane body of claim 6 wherein said first and second strut members extend slightly upwardly at the rear ends thereof.
Claim 9
Dependent Claim
27 words
The airplane body of claim 4 wherein in lateral cross-section, the axes of said first, second and third strut members form the corners of an isosceles triangle.
Claim 10
Dependent Claim
17 words
The airplane body of claim 1 wherein said first and second strut members have a tubular configuration.
Claim 11
Dependent Claim
15 words
The airplane body of claim 4 wherein said third strut member has a tubular configuration.
Claim 12
Dependent Claim
17 words
The airplane body of claim 9 wherein said first and second strut members are sealed for floatation.
Claim 13
Dependent Claim
19 words
The airplane body of claim 1 wherein said first and second strut members are located substantially within said fuselage.
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) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |