Means for preventing skidding of vehicle wheels
Abstract
Abstract A FLUID PRESSURE BRAKING SYSTEM, INCLUDING MEANS OPERATED BY A FLUID SERVO-DEVICE TO ISOLATE A BRAKE OPERATING CYLINDER FROM ITS ASSOCIATED PRESSURE SOURCE WHEN A TENDENCY TO SKID IS SENSED, AND TO REDUCE THE PRESSURE IN SAID OPERATING CYLINDER, HAS THE PRESSURE IN THE WORKING CHAMBER OF THE SERVO MOTOR CONTROLLED BY A VALVE ACTUATED BY A SKID SENSING DEVICE, THE VALVE BEING CONNECTED TO SOURCES OF RELATIVELY LOWER AND HIGHER PRESSURE AND THE CONNECTION TO AT LEAST ONE OF SAID SOURCES BEING THROUGH A FLOW RESTRICTING DEVICE, AND AN AUXILIARY RESERVOIR BEING CONNECTED BETWEEN THE RESTRICTION AND THE VALVE SO THAT A RAPID INITIAL CHANGE IN PRESSURE IN THE WORKING CHAMBER TAKES PLACE DUE TO EQUALISATION OF PRESSURE IN THE WORDING CHAMBER AND RESERVOIR, FOLLOWED BY A SLOW CHANGE DUE TO THE FLOW RESTRICTION.
Inventors
- 👤 Mervyn B Packer
- 👤 James Jesty
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |