US3768754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Louver system with sandwich type blades
Assignee: ORG EUROP DE RECH SPATIALES
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Filing: 1972-01-20
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Granted: 1973-10-30
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Expires: 1992-01-20
Abstract
Abstract A louver system to be used on spacecrafts and space vehicles, comprising movable panels mounted on a support means, each being adapted to rotate about an axis parallel to the surface of the support means, and actuators sensitive to the temperature of said support means for moving the panels about their respective axis. Each panel consists of two substantially parallel blades that are not in thermal contact with each other, the outer surfaces of the two blades having high reflectance and thermal emissivity factors and the two inner surfaces thereof which are facing each other having a low emissivity factor.
Inventors
- 👤 M Janes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:30
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/46; B64G1/50; B64G1/503
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
In a spacecraft of the type having a surface, a plurality of louver panels mounted for rotation about parallel axes adjacent said surface with said axes being parallel to said surface, and thermally responsive means for controlling the angular displacement of said panels about their respective axes; the improvement wherein each said panel is comprised of a pair of substantially parallel blades spaced apart so as not to be in thermal contact with each other, the axis of rotation of each said pair of blades being vertically disposed between the blades of each pair of blades, each blade of each said pair of blades having one surface with high reflectance and emissivity factors, the blades of each pair of blades being mounted with the low emissivity surfaces facing each other, and wherein said surface of said spacecraft is reflective.
Claim 2
Dependent Claim
139 words
In a spacecraft of the type having a surface, a plurality of louver panels mounted for rotation about parallel axes adjacent said surface with said axes being parallel to said surface, and thermally responsive means for controlling the angular displacement of said panels about their respective axes; the improvement wherein each said panel is comprised of a pair of substantially parallel blades spaced apart so as not to be in thermal contact with each other, the axis of rotation of each said pair of blades being vertically disposed between the blades of each pair of blades, each blade of each said pair of blades having one surface with high reflectance and emissivity factors, the blades of each pair of blades being mounted with the low emissivity surfaces facing each other, and wherein said surface of said spacecraft is reflective.
Claim 3
Dependent Claim
46 words
The spacecraft of claim 1 wherein each said blade is comprised of a layer of transparent material forming the surface thereof having high reflectance and emissivity characteristics, and a layer of a metal deposited on said transparent material and forming said surface with low emissivity factor.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |