US4995722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for assisting hovering aircraft to land on the platform of a vessel
Assignee: Societe Anonyme de Telecommunications SAT
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Filing: 1989-09-13
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Granted: 1991-02-26
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Expires: 2009-09-13
Abstract
Abstract The aircraft (1) incorporates means for emitting a conical light beam (14). The vessel (2) incorporates photosensitive cells (6) materializing the outline of the beam on the vessel, which is an ellipse (7). Means determine the equation of the ellipse (17) and, from this, landing data which are displayed on a panel (25).
Inventors
- 👤 Laurent Sutour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:53
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; G05D1/0858; B; B64; B64F; B64F1/00; B64F1/12; B64F1/18; B64F1/20; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676; G05D1/0684
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A system for assisting the landing, in its final stage, of a hovering aircraft on the platform of a vessel, comprising: emitting means on said aircraft for emitting a conical beam; sensitive means on said platform for being sensitive to the cross-section of said conical beam on said platform; determining means on said vessel for determining said cross-section with respect to a reference on said platform from said sensitive means and determining landing data for said aircraft from said cross-section; and display means on said vessel for displaying the landing data from said determining means.
Claim 2
Independent Claim
95 words
A system for assisting the landing, in its final stage, of a hovering aircraft on the platform of a vessel, comprising: emitting means on said aircraft for emitting a conical beam; sensitive means on said platform for being sensitive to the cross-section of said conical beam on said platform; determining means on said vessel for determining said cross-section with respect to a reference on said platform from said sensitive means and determining landing data for said aircraft from said cross-section; and display means on said vessel for displaying the landing data from said determining means.
Claim 3
Dependent Claim
22 words
System as claimed in claim 1, in which said emitting means emits a light beam and said sensitive means are photosensitive means.
Claim 4
Dependent Claim
21 words
System as claimed in claim 2, in which said photosensitive means comprise photosensitive cells arranged along the arms of a cross.
Claim 5
Dependent Claim
25 words
System as claimed in claim 3, in which said photosensitive means further comprise a third line of photosensitive cells intersecting said cross at its center.
Claim 6
Dependent Claim
32 words
System as claimed in claim 1, in which said determining means determines, from the cross-section of the beam, the distance from the apex of the beam to the plane of said cross-section.
Claim 7
Dependent Claim
17 words
System as claimed in claim 1, in which said emitting means emits a conical beam of revolution.
Claim 8
Dependent Claim
29 words
System as claimed in claim 6, in which said determining means determines the inclination of the axis of the beam to the vertical of the plane of said cross-section.
Claim 9
Dependent Claim
28 words
System as claimed in claim 6, in which said emitting means emits a beam with an axis and an aperture angle such that said cross-section is an ellipse.
Claim 10
Dependent Claim
20 words
System as claimed in claim 1, in which said reference has as its origin the centre of a landing grid.
References Cited (Backward Citations)
FR1605307A
Cited
US3721499A
Cited
US3671963A
Cited
US3765770A
Cited
US3727055A
Cited
US3790276A
Cited
US3843263A
Cited
US4209767A
Cited
US4291977A
Cited
EP0015199A1
Cited
US4695013A
Cited
FR2569838A1
Cited
US4710620A
Cited
DE3629911A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |