US3554612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antilock brake control
Assignee: Motors Liquidation Co
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Filing: 1968-08-21
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Granted: 1971-01-12
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Expires: 1988-08-21
Abstract
Abstract AN ELECTRONIC CONTROL IS RESPONSIVE TO WHEEL ACCELERATION TO PRODUCE SIGNALS FOR EFFECTING ALTERNATING BRAKE RELEASE, HOLD, AND APPLICATION TO AVOID WHEEL LOCK. A WHEEL VELOCITY ERROR CIRCUIT COMPARES A WHEEL ACCELERATION SIGNAL TO A REFERENCE SIGNAL AND INTEGRATES THE DIFFERENCE TO CONTROL BRAKE RELEASE. A SIMILAR CIRCUIT RESPONSIVE TO THE WHEEL ACCELERATION SIGNAL AND ANOTHER REFERENCE SIGNAL CONTROLS BRAKE HOLD AND APPLICATION. A THIRD CIRCUIT VARIES THE REFERENCE SIGNALS TO OPTIMIZE THE CONTROL FUNCTION.
Inventors
- 👤 John L Harned
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:04
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1761; B60T8/17613
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |