Patent US3952974A successfully refreshed from Google Patents.
US3952974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cargo-handling system for standard body airplanes
Assignee: Boeing Co
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Filing: 1974-12-20
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Granted: 1976-04-27
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Expires: 1994-12-20
Abstract
Abstract A cargo-handling apparatus which includes a cargo platform for airplanes which is structurally configured to prevent swaying of the cargo platform during loading and unloading of cargo from an aircraft. A pair of braced channel members are provided, which in their operative position extend vertically downward from both sides of the cargo hold of the aircraft, with a cargo platform positioned therebetween. The channel members are braced against movement by a pair of jury struts which extend between each channel member and the body of the aircraft, and a pair of cross braces extending between the channel members. The cargo platform moves up and down between and is guided by the channel members under the control of a power drive unit. The jury struts are disconnectable from the aircraft, and the combination of the jury struts, the braced channel members and the cargo platform is foldable such that the combination is stowable just inside the cargo hold door.
Inventors
- 👤 John M. Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:27
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
190 words
A stowable cargo-handling apparatus for use in an aircraft to load and unload cargo comprising: a cargo platform movable vertically and pivotable about one edge thereof; frame means for supporting and guiding said cargo platform and engaging said platform at said one edge comprising a pair of channel members pivotally attached to said aircraft adjacent a cargo hold opening, said channel members movable from a cargo lifting position extending substantially vertically downward from the cargo hold opening to a stowed position by rotation thereof through said cargo hold opening; hoist means connected to said cargo platform by a first flexible lifting means engaging said one edge of said cargo platform and a second flexible lifting means engaging another edge of said cargo platform, said hoist means operable to move said cargo platform from a position adjacent the ground to a position adjacent said cargo hold opening by simultaneous upward movement of said first and said second flexible lifting means and operable to rotate said cargo platform from said position adjacent said cargo hold to a stowed position within said aircraft by further upward movement of said second flexible lifting means.
Claim 2
Dependent Claim
190 words
A stowable cargo-handling apparatus for use in an aircraft to load and unload cargo comprising: a cargo platform movable vertically and pivotable about one edge thereof; frame means for supporting and guiding said cargo platform and engaging said platform at said one edge comprising a pair of channel members pivotally attached to said aircraft adjacent a cargo hold opening, said channel members movable from a cargo lifting position extending substantially vertically downward from the cargo hold opening to a stowed position by rotation thereof through said cargo hold opening; hoist means connected to said cargo platform by a first flexible lifting means engaging said one edge of said cargo platform and a second flexible lifting means engaging another edge of said cargo platform, said hoist means operable to move said cargo platform from a position adjacent the ground to a position adjacent said cargo hold opening by simultaneous upward movement of said first and said second flexible lifting means and operable to rotate said cargo platform from said position adjacent said cargo hold to a stowed position within said aircraft by further upward movement of said second flexible lifting means.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1, wherein said first and second lifting means comprise link chains.
Claim 4
Dependent Claim
39 words
The apparatus of claim 1, wherein said first and second lifting means are flexible members passing around and operatively engaging rotatable drive means, slack in portions of said lifting means passing said drive means being taken up by negators.
Claim 5
Dependent Claim
34 words
The apparatus of claim 1 and a pair of rigid struts, one of said struts extending from each channel member to said aircraft to stabilize said channel member against movement during cargo moving operations.
Claim 6
Dependent Claim
45 words
The apparatus of claim 1, wherein said guiding means includes two spaced, coplanar channel members, said cargo platform being positioned between said two channel members and including projection means secured thereto and positionable in said channel members to facilitate movement of said cargo platform therealong.
Claim 7
Dependent Claim
50 words
The apparatus of claim 5, wherein said projection means are rollers, which rollers mate with said channel members to guide said cargo platform as it is moved between the cargo hold opening and said termination point, said rollers being positioned on opposite sides of said platform adjacent one end thereof.
Claim 8
Dependent Claim
17 words
The apparatus of claim 5, including bracing means extending between and rigidly interconnecting said spaced channel members.
Claim 9
Dependent Claim
37 words
The apparatus of claim 7, wherein said bracing means includes at least two elongated bars, extending perpendicularly between said spaced channel members, one of said bars being connected to said channel members adjacent the terminal end thereof.
Claim 10
Dependent Claim
18 words
The apparatus of claim 4, wherein said rigid struts are slanted toward one another from said channel members.
Claim 11
Dependent Claim
23 words
The apparatus of claim 4, wherein each of said rigid struts is connected to one channel member by means of a universal connection.
Claim 12
Dependent Claim
26 words
The apparatus of claim 10, wherein said rigid struts extend rearward of the channel members to the aircraft at an angle on the order of 45°.
Claim 13
Dependent Claim
30 words
An apparatus of claim 9, wherein said rigid struts are splayed toward one another from the channel members at an angle substantially on the order of 30° from the vertical.
Claim 14
Dependent Claim
35 words
The apparatus of claim 4, including clip means positioned in the vicinity of the terminal end of said channel members, said rigid struts adapted to be secured to said channel means by said clip means.
Claim 15
Dependent Claim
81 words
The apparatus of claim 1, wherein said cargo platform is multilateral in outline, and includes at least two sides which are generally parallel with the longitudinal axis of the aircraft, one of said parallel sides being nearer to the aircraft than the other, the other parallel side having two rotatable hooks connected thereto at spaced points therealong, said hooks being rotatable about said connection points, and including means for stopping said hooks such that they are parallel with said cargo platform.
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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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |