ANTI-ROLLAWAY DEVICE FOR TRUCKS AND EQUIPMENT WITH FLUID AND ELECTRICALLY ACTUATED BRAKES
First Claim
Patent Images
1. A vehicle anti-rollaway device comprising:
- a source of electrical power;
means responsive to providing and withholding electrical power from the source of electrical power for controlling the operation of a parking brake of the vehicle as a function thereof; and
means responsive to the presence and absence of a vehicle operator at a predetermined location in the vehicle for controlling said providing and withholding of electrical power from the means for controlling the operation of a parking brake.
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Abstract
A vehicle anti-rollaway device includes a first switch responsive to the presence and absence of an operator at a predetermined location in the vehicle for controlling the on/off state of parking brake of the vehicle in the form of either a servo controlled parking brake or a fluid controlled parking brake. The device can also include a speed control responsive to a speed of the vehicle for controlling the on/off state of the parking brake as a function of the speed of the vehicle. The device can also include a second switch operative for controlling the response of the parking brake to the state of the first switch.
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Citations
29 Claims
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1. A vehicle anti-rollaway device comprising:
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a source of electrical power; means responsive to providing and withholding electrical power from the source of electrical power for controlling the operation of a parking brake of the vehicle as a function thereof; and means responsive to the presence and absence of a vehicle operator at a predetermined location in the vehicle for controlling said providing and withholding of electrical power from the means for controlling the operation of a parking brake. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 29)
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11. A vehicle anti-rollaway device comprising:
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a parking control valve operative for controlling the supply of pressurized fluid to a parking brake of the vehicle; a speed sensor operative for outputting a speed signal corresponding to a speed of the vehicle; a speed control responsive to the speed signal for outputting a signal as a function of speed sensor indicating the vehicle is at or below a predetermined speed; a solenoid valve responsive to the signal output by the speed control for controlling the supply of pressurized fluid to the parking control valve; a first switch operative for controlling the response of the solenoid valve to the signal output by the speed control as a function of the supply of pressurized fluid to the parking brake of the vehicle; and a second switch operative for controlling the response of the solenoid valve to the signal output by the speed control as a function of the presence of an operator at a predetermined location in the vehicle. - View Dependent Claims (12, 13, 14)
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15. A vehicle anti-rollaway device for use on a vehicle equipped with a parking control valve operative for controlling the supply of pressurized fluid to a parking brake of the vehicle, said device comprising:
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a speed control operative for outputting a signal when the speed of the vehicle is at or below a predetermined speed; a solenoid valve responsive to the signal output by the speed control for controlling the supply of pressurized fluid to the parking brake of the vehicle; and a first switch operative for controlling the response of the solenoid valve to the signal output by the speed control as a function of the presence and absence of an operator at a predetermined location in the vehicle, wherein, in response to the operator moving from the predetermined location in the vehicle when pressurized fluid is being supplied to the parking brake of the vehicle via the solenoid valve and the parking control valve, the first switch changes state whereupon the solenoid valve terminates the supply of pressurized fluid to the parking brake of the vehicle. - View Dependent Claims (16, 17, 18, 19)
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20. A vehicle anti-rollaway device comprising:
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a valve operatively coupled between a source of pressurized fluid and a fluid actuated parking brake of the vehicle; and a first switch responsive to the presence and absence of an operator at a predetermined location in the vehicle for controlling the state of the valve to respectively supply and withhold pressurized fluid to the parking brake of the vehicle. - View Dependent Claims (21, 22, 23)
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- 24. A vehicle anti-rollaway device comprising a first switch responsive to the presence and absence of an operator at a predetermined location in the vehicle for controlling the on/off state of a parking brake of the vehicle.
Specification