Anti-skid device for a vehicle braking system
Abstract
Abstract AN ANTI-SKID DEVICE FOR A VEHICLE BRAKING SYSTEM HAVING AN ELECTRONIC SENSING UNIT SELECTIVELY CONTROLLING THE OPERATION OF AN ACTUATING UNIT FORMED OF TWO COMPONENTS. ONCE THE BRAKING PRESSURE HAS BEEN APLIED TO THE BRAKING SYSTEM, ONE OF THE COMPONENTS IS SELECTIVELY ACTIVATED TO ISOLATE THE BRAKE PEDAL FROM THE BRAKING SYSTEM BETWEEN ONE INSTANT CORRESPONDING TO A PREDETERMINED THRESHOLD OF WHEEL DECELERATION AND ANOTHER INSTANT CORRESPONDING TO THE PEAK VALUE OF THE WHEEL ACCELERATION WHICH FOLLOWS THE WHEEL DECELERATION WHILE THE OTHER COMPONENT IS SELECTIVELY ACTIVATED TO PROGRESSIVELY RELEASE THE PRESSURE IN THE BRAKING SYSTEM TO A CERTAIN VALUE BETWEEN SAID ONE INSTANT CORRESPONDING TO SAID PREDETERMINED THRESHOLD OF WHEEL DECELERATION AND STILL ANOTHER INSTANT CORRESPONDING TO A SECOND PREDETERMINED THRESHOLD OF WHEEL DECELERATION WHICH IS CLOSED TO THE POINT OF ZERO DECELERATION (OR ACCELERATION), THE PRESSURE IN THE ISOLATED BRAKING SYSTEM BEING MAINTAINED TO THE SAID VALUE UNTIL THE INSTANT CORRESPONDING TO THE PEAK VALUE OF THE WHEEL ACCELERATION WHICH FOLLOWS THE WHEEL DECELERATION. IN OTHER WORDS, THE PRESSURE IS RESTORED IN THE BRAKING SYSTEM WHEN THE COEFFICIENT OF FRICTION U DEVELOPED AT THE INTERFRACE BETWEEN THE TIRE AND THE ROAD REACHES A MAXIMUM VALUE.
Inventors
- 👤 Guy Marouby
Bibliographic Details
Claims Analysis
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |