Patent US5532077A successfully refreshed from Google Patents.
Patent US3669508A successfully refreshed from Google Patents.
US3669508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheelspeed information signal processing system
Assignee: Individual
•
Filing: 1970-06-08
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Granted: 1972-06-13
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Expires: 1990-06-08
Abstract
Abstract A BRAKING SYSTEM WHICH INCLUDES MEANS FOR GENERATING SIGNALS HAVING PREDEFINED RELATIONSHIP WITH RESPECT TO WHEELSPEED INFORMATION SIGNALS HAVING UNDESIRED FREQUENCY COMPONENTS. THE EROR SIGNAL IN AN ANTI-SKID SYSTEM IS EFFECTIVELY DIFFERENTIATED IN A CIRCUIT WHICH PROVIDES A POSITIVE SINUSOIDAL SIGNAL AT GEAR (OR LANDING GEAR TRUCK) FREQUENCY WHICH IS UTILIZED IN THE WHEELSPEED INFORMATION SIGNAL PROCESSING SYSTEM TO CANCEL AN UNDESIRED GEAR WALK GENERATED NEGATIVE SINUSOIDAL SIGNAL COMPONENT ALSO AT GEAR FREQUENCY WHICH IS SUPERIMPOSED UPON THE TRUE WHEELSPEED INFORMATION SIGNALS.
Inventors
- 👤 Narinder S Attri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:32
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/173
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |