Failure warning and shut-off for anti-skid system
First Claim
1. In a brake system for a wheeled vehicle having anti-skid circuitry associated with the wheels thereof for producing and applying anti-skid signals indicative of skidding activity of the wheels to anti-skid valves, the improvement comprising:
- first circuit means connected to the anti-skid circuitry for receiving the anti-skid signals and producing a first signal if the anti-skid signals exceed a predetermined level;
second circuit means connected to said first circuit means and controlled by said first signal for inhibiting the application of the anti-skid signals to the anti-skid valves; and
third circuit means connected to and controlled by said second circuit means for applying a pulsating signal to the anti-skid valves upon the inhibiting of the application of the anti-skid signals thereto.
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0 Petitions
Accused Products
Abstract
An improvement is provided for use in a wheeled vehicle having anti-skid circuitry associated with the wheels thereof. Fundamentally, the invention comprises a comparator connected to the anti-skid circuitry which products an output signal when anti-skid signals exceed a particular level for a predetermined period of time. The output of the comparator is operative for removing the application of the anti-skid control circuit from the anti-skid valves and for applying in its place a rudimentary anti-skid control circuit comprising a multivibrator of predetermined duty cycle. Thus, under all conditions, braking effort remains with the vehicle operator but under certain conditions is modulated at a predetermined rate by the multivibrator. Provisions are also made for returning the anti-skid system to normal operation in conjunction with the brake system when the output of the anti-skid system drops below the aforesaid particular level.
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Citations
12 Claims
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1. In a brake system for a wheeled vehicle having anti-skid circuitry associated with the wheels thereof for producing and applying anti-skid signals indicative of skidding activity of the wheels to anti-skid valves, the improvement comprising:
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first circuit means connected to the anti-skid circuitry for receiving the anti-skid signals and producing a first signal if the anti-skid signals exceed a predetermined level; second circuit means connected to said first circuit means and controlled by said first signal for inhibiting the application of the anti-skid signals to the anti-skid valves; and third circuit means connected to and controlled by said second circuit means for applying a pulsating signal to the anti-skid valves upon the inhibiting of the application of the anti-skid signals thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a wheeled vehicle having anti-skid circuitry associated with the wheels thereof for producing anti-skid signals indicative of conditions of non-rotation of the wheels and for applying the anti-skid signals to anti-skid valves for the wheels, the improvement comprising:
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a comparator connected to the anti-skid circuitry and producing an output signal when the anti-skid signals exceed a particular level; a pulse generator; and a switching circuit interconnected between said pulse generator and the anti-skid circuitry and controlled by said comparator to interconnect the anti-skid valves with the pulse generator upon receipt of said output signals and simultaneously disconnect the anti-skid circuitry from the anti-skid valves. - View Dependent Claims (9, 10, 11, 12)
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Specification