Patent US235294A successfully refreshed from Google Patents.
Patent US4034480A successfully refreshed from Google Patents.
US4034480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual descent sighting device for aircraft
Assignee: Individual
•
Filing: 1975-07-31
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Granted: 1977-07-12
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Expires: 1995-07-31
Abstract
Abstract This invention relates to a self-contained sighting device for use in aircraft that will give visual descent guidance to the pilot while making his final approach to a runway for a landing. The device comprises frames or windows that sight along an imaginary approach path which automatically directs the pilot's line of sight to parallel the desired approach path thereby aiding the pilot in his approach to the intended landing spot.
Inventors
- 👤 William R. Mehrtens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:58
CPC Classifications
B; B64; B64D; B64D45/00; B64D45/04; B64D45/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A visual descent sighting device for aircraft to provide visual descent guidance to a pilot during landing comprising means for defining parallel sighting windows that are spaced an equal distance apart, said means having a three-dimensional ladder-type structure with at least two horizontal sighting plates, and at least one vertical member connected to said horizontal sighting plates and means for mounting said sighting windows on said aircraft in order that a landing area can be framed in a relatively small field of vision.
Claim 2
Dependent Claim
83 words
A visual descent sighting device for aircraft to provide visual descent guidance to a pilot during landing comprising means for defining parallel sighting windows that are spaced an equal distance apart, said means having a three-dimensional ladder-type structure with at least two horizontal sighting plates, and at least one vertical member connected to said horizontal sighting plates and means for mounting said sighting windows on said aircraft in order that a landing area can be framed in a relatively small field of vision.
Claim 3
Dependent Claim
26 words
The sighting device claimed in claim 1 wherein said vertical member is comprised of two vertically aligned members and said horizontal sighting plates are connected therebetween.
Claim 4
Dependent Claim
27 words
The sighting device claimed in claim 2, including secondary horizontal plates spaced equally between the horizontal sighting plates providing a guide for a visual runway landing alignment.
Claim 5
Dependent Claim
26 words
The sighting device claimed in claim 3 wherein the secondary horizontal plates are connected to the vertical members but do not extend between the vertical members.
Claim 6
Dependent Claim
26 words
The sighting device claimed in claim 1 wherein said aircraft includes a glare shield and said mounting means is adapted to be affixed on said shield.
Claim 7
Dependent Claim
31 words
The sighting device claimed in claim 5 wherein said mounting means includes means for movably positioning said sighting device about a horizontal axis perpendicular to the longitudinal axis of the aircraft.
Claim 8
Dependent Claim
29 words
The sighting device claimed in claim 1 wherein said vertical member is connected to said horizontal sighting plates to form sighting windows on either side of said vertical member.
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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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |