Patent US1725296A successfully refreshed from Google Patents.
Patent US3577838A successfully refreshed from Google Patents.
US3577838A
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Airport gangway
Assignee: Aviolanda Maalschappij voor Vliegtuigbouw NV
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Filing: 1968-10-07
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Granted: 1971-05-11
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Expires: 1988-10-07
Abstract
Abstract A telescoping airport gangway incorporating means for adjusting its vertical position, for lengthening and shortening it, and for pivoting it about its rear end.
Inventors
- 👤 Nicolaas Gradus Jan Will Marle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:58
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/30; B64F1/305
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
A gangway including telescoping sections and having a fixed end and a free end, a portal including a pair of spaced upstanding arms (5, 5), motor means (11, 11) connected to said gangway for raising and lowering it in a vertical plane, and guide means on said portal and gangway for guiding the movement of said gangway, the improvement wherein said arms of said portal provide curved guideways (6) for guiding said gangway in said vertical plane, said guideways having radii of curvature converging towards said fixed end of said gangway.
Claim 2
Dependent Claim
91 words
A gangway including telescoping sections and having a fixed end and a free end, a portal including a pair of spaced upstanding arms (5, 5), motor means (11, 11) connected to said gangway for raising and lowering it in a vertical plane, and guide means on said portal and gangway for guiding the movement of said gangway, the improvement wherein said arms of said portal provide curved guideways (6) for guiding said gangway in said vertical plane, said guideways having radii of curvature converging towards said fixed end of said gangway.
Claim 3
Dependent Claim
28 words
Apparatus as in claim 1 including a plurality of upper and lower guide rollers (8, 9) carried by said gangway and engaging opposite sides of said curved guideways.
Claim 4
Dependent Claim
107 words
Apparatus for supporting a gangway, said apparatus comprising a portal (5) mounted on the chassis of a truck (3) provided with road wheels (24), said truck having a pair of spaced wheel assemblies each including a separate steering disc (14, 14'' ) each mounted for rotation about a respective vertical axis, a common elongated drive element entrained about each steering disc for rotating each disc in a common direction and including drive means for moving said drive element to and fro, the improvement comprising one steering disc (14) being larger in diameter than the other steering disc (14'' ) for rotating said wheel assemblies at different rates.
Claim 5
Dependent Claim
107 words
Apparatus for supporting a gangway, said apparatus comprising a portal (5) mounted on the chassis of a truck (3) provided with road wheels (24), said truck having a pair of spaced wheel assemblies each including a separate steering disc (14, 14'' ) each mounted for rotation about a respective vertical axis, a common elongated drive element entrained about each steering disc for rotating each disc in a common direction and including drive means for moving said drive element to and fro, the improvement comprising one steering disc (14) being larger in diameter than the other steering disc (14'' ) for rotating said wheel assemblies at different rates.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |