US4489806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for raising and lowering an airfoil
Assignee: Aisin Corp
•
Filing: 1983-04-27
•
Granted: 1984-12-25
•
Expires: 2003-04-27
Abstract
Abstract A device for raising and lowering an airfoil mounted on a lower portion of a vehicle body comprises a driving mechanism for driving the airfoil upwardly and downwardly, an electric device such as a motor for actuating the driving mechanism, a vehicle height detector for detecting the height of the vehicle body with respect to an axle, an airfoil height detector for detecting the height of the airfoil with respect to the vehicle body, and a control unit responsive to the vehicle height as detected by the vehicle height detector, the airfoil height as detected by the airfoil height detector, and the speed of travel of the vehicle body for actuating the electric device to lower the airfoil when the speed exceeds a predetermined level and the vehicle height is high.
Inventors
- 👤 Masuo Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:57
CPC Classifications
B; B62; B62D; B62D35/00; B62D35/005; B62D37/00; B62D37/02; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/82; Y10; Y10S; Y10S180/00; Y10S180/903
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A device for raising and lowering an airfoil mounted on a lower portion of a vehicle body, comprising: (a) a driving mechanism for driving the airfoil upwardly and downwardly; (b) an electric device for actuating said driving mechanism; (c) a vehicle height detector for detecting the height of the vehicle body with respect to an axle; (d) an airfoil height detector for detecting the height of the airfoil with respect to the vehicle body; and (e) a control unit responsive to the vehicle height as detected by said vehicle height detector, the airfoil height as detected by said airfoil height detector, and the speed of travel of the vehicle body for actuating said electric device to lower the airfoil when said speed exceeds a predetermined level and the vehicle height is high.
Claim 2
Independent Claim
132 words
A device for raising and lowering an airfoil mounted on a lower portion of a vehicle body, comprising: (a) a driving mechanism for driving the airfoil upwardly and downwardly; (b) an electric device for actuating said driving mechanism; (c) a vehicle height detector for detecting the height of the vehicle body with respect to an axle; (d) an airfoil height detector for detecting the height of the airfoil with respect to the vehicle body; and (e) a control unit responsive to the vehicle height as detected by said vehicle height detector, the airfoil height as detected by said airfoil height detector, and the speed of travel of the vehicle body for actuating said electric device to lower the airfoil when said speed exceeds a predetermined level and the vehicle height is high.
Claim 3
Dependent Claim
27 words
A device according to claim 1, wherein said control unit actuates said electric device to raise the airfoil when said speed is lower than said predetermined level.
Claim 4
Dependent Claim
24 words
A device according to claim 1, wherein said control unit actuates said electric device to raise the airfoil when said vehicle height is low.
Claim 5
Dependent Claim
33 words
A device according to claim 1, wherein said control unit actuates said electric device to raise the airfoil when said speed is lower than said predetermined level and said vehicle height is low.
Claim 6
Dependent Claim
25 words
A device according to claim 1, wherein said control unit is responsive to a brake signal for actuating said electric device to raise the airfoil.
References Cited (Backward Citations)
US2448167A
Cited
US3455594A
Cited
US3618998A
Cited
US4119339A
Cited
US4102548A
Cited
US4105088A
Cited
US4232757A
Cited
US4131308A
Cited
US4159140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |