US3832012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiskid braking circuit
Assignee: DBA SA
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Filing: 1973-01-12
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Granted: 1974-08-27
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Expires: 1993-01-12
Abstract
Abstract An anti-skid braking circuit for a vehicle having two independent braking circuits, a first circuit including the main brake actuators of the front wheels and a second circuit including supplementary brake actuators of the front wheels and the brake actuators of the rear wheels. Each front wheel is equipped with a speed sensor connected on one hand with an electronic anti-skid logic monitoring a fluid pressure modulator associated with the corresponding main actuator, and on the other hand with another electronic anti-skid logic monitoring another modulator controlling the fluid pressure in the second circuit. The rear wheels of the vehicle are equipped with speed sensors also connected to the other anti-skid logic.
Inventors
- 👤 G Bourgoin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:43
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/343; B60T8/344; B60T8/345
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
338 words
In a vehicle having a pair of axles, a pair of wheels on each of said axles, braking means for controlling each of said wheels, a pair of primary brake actuating means for controlling the brakes on one of said axles, secondary brake actuating means for controlling the brakes on the other axle, a pair of supplementary brake actuating means for assisting each of said primary brake actuating means for controlling the brakes on said one axle, a first hydraulic system for actuating said primary brake actuating means and a second hydraulic system for actuating conjointly said secondary brake actuating means and said supplementary brake actuating means, an adaptive braking system comprising a wheel speed sensor for each of said wheels, each of said wheel speed sensors generating a signal proportional to the rotational velocity of a corresponding vehicle wheel, a first modulator in said first hydraulic system controlling fluid communication to one of said primary actuators and not affecting any of said secondary or supplemental brake actuating means, a first logic circuit responsive to the signal generated by the wheel speed sensor responsive to the wheel controlled by said one primary actuator to generate a signal actuating said first modulator when an incipient skidding condition of the corresponding wheel is sensed, a second modulator in said first hydraulic system controlling fluid communication to the other primary actuator and not affecting any of said secondary and supplemental actuators, a second logic circuit responsive to the signal generated by the wheel speed sensor responsive to the wheel controlled by said other primary actuator to generate a signal actuating said second modulator when an incipient skidding condition of the corresponding vehicle wheel is sensed, a third modulator in said second hydraulic system controlling fluid communication to each of said secondary actuators and each of said supplementary actuators, a third logic circuit connected to each of said wheel speed sensors and responsive thereto to actuate said third modulator whenever an incipient skidding condition is sensed in any of the vehicle wheels.
Claim 2
Dependent Claim
338 words
In a vehicle having a pair of axles, a pair of wheels on each of said axles, braking means for controlling each of said wheels, a pair of primary brake actuating means for controlling the brakes on one of said axles, secondary brake actuating means for controlling the brakes on the other axle, a pair of supplementary brake actuating means for assisting each of said primary brake actuating means for controlling the brakes on said one axle, a first hydraulic system for actuating said primary brake actuating means and a second hydraulic system for actuating conjointly said secondary brake actuating means and said supplementary brake actuating means, an adaptive braking system comprising a wheel speed sensor for each of said wheels, each of said wheel speed sensors generating a signal proportional to the rotational velocity of a corresponding vehicle wheel, a first modulator in said first hydraulic system controlling fluid communication to one of said primary actuators and not affecting any of said secondary or supplemental brake actuating means, a first logic circuit responsive to the signal generated by the wheel speed sensor responsive to the wheel controlled by said one primary actuator to generate a signal actuating said first modulator when an incipient skidding condition of the corresponding wheel is sensed, a second modulator in said first hydraulic system controlling fluid communication to the other primary actuator and not affecting any of said secondary and supplemental actuators, a second logic circuit responsive to the signal generated by the wheel speed sensor responsive to the wheel controlled by said other primary actuator to generate a signal actuating said second modulator when an incipient skidding condition of the corresponding vehicle wheel is sensed, a third modulator in said second hydraulic system controlling fluid communication to each of said secondary actuators and each of said supplementary actuators, a third logic circuit connected to each of said wheel speed sensors and responsive thereto to actuate said third modulator whenever an incipient skidding condition is sensed in any of the vehicle wheels.
Claim 3
Dependent Claim
35 words
The invention of claim 1; and valve means for connecting the pressure communicated to said secondary actuators in said second hydraulic system between the outlet of said third modulator and said secondary brake actuating means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |