Automatic drum rotation control concrete transit mixer truck
First Claim
Patent Images
1. A concrete transit mixer truck comprising:
- a drum;
a hydraulic system for rotating the drum;
a vehicle motion sensor for providing a vehicle motion signal indicative of vehicle speed; and
a control system for controlling the hydraulic system, when the vehicle speed exceeds a threshold speed, to rotate the drum at a constant drum speed.
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Abstract
A concrete transit mixer truck includes a control system that automatically controls rotation of the mixer drum at a constant drum speed when the mixer truck is traveling. When sensed speed of the truck exceeds a threshold, the control system automatically causes a hydraulic system to rotate the drum at a constant speed, regardless of the truck engine speed.
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Citations
24 Claims
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1. A concrete transit mixer truck comprising:
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a drum; a hydraulic system for rotating the drum; a vehicle motion sensor for providing a vehicle motion signal indicative of vehicle speed; and a control system for controlling the hydraulic system, when the vehicle speed exceeds a threshold speed, to rotate the drum at a constant drum speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling concrete transit mixer truck, comprising the method:
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sensing vehicle speed of the truck; and controlling rotation of a mixer drum of the truck to rotate the drum at a constant drum speed when the sensed vehicle speed indicates that the truck is traveling. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An automatic constant drum speed control for a concrete transit mixer truck, the control comprising:
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means for determining when the truck is moving at greater than a threshold vehicle speed; and means for controlling rotation of a mixer drum of the truck at a constant speed in response to a determination that the truck is moving at greater than the threshold vehicle speed. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification