Paver with radar screed control
First Claim
Patent Images
1. A road working apparatus comprising:
- a movable vehicle;
a leveller disposed on the vehicle for forming a mat of material on a base surface;
a radar device for determining the position of the leveller relative to a reference; and
a leveller controller for adjusting the leveller responsive to leveller position information from the radar device.
1 Assignment
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Accused Products
Abstract
A paving apparatus is provided with a micropower impulse radar device connected to control a leveller. The leveller is a screed provided with actuators for adjusting screed elevation, slope, and extension. The radar senses a reference, such as a string line, and operates the actuators to adjust the screed.
107 Citations
26 Claims
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1. A road working apparatus comprising:
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a movable vehicle; a leveller disposed on the vehicle for forming a mat of material on a base surface; a radar device for determining the position of the leveller relative to a reference; and a leveller controller for adjusting the leveller responsive to leveller position information from the radar device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A paver comprising:
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a hopper for receiving and holding paving material; a screed for levelling paving material from the hopper on a base surface; a conveyor for moving the paving material from the hopper to the screed; an auger for distributing paving material from the conveyor laterally ahead of the screed; a pair of tow arms extending forwardly from the screed; an actuator connected to adjust one of the tow arms thereby adjusting the screed; a grade sensor mounted for movement with the screed and comprising a radar device adapted for measuring a distance to a reference; and a screed control connected to control the actuator responsive to distance signals from the grade sensor so as to adjust screed elevation. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A paver comprising:
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a hopper for receiving and holding paving material; a screed for levelling paving material from the hopper on a base surface, said screed having an extendable section; an actuator adapted for laterally extending and retracting the extendable section of the screed; a conveyor for moving the paving material from the hopper to the screed; an auger for distributing paving material from the conveyor laterally ahead of the screed; a screed alignment sensor disposed on the extendable section of the screed and comprising a radar device adapted for measuring deviation from a reference; and a screed control connected to control the actuator responsive to signals from the alignment sensor so as to adjust screed extension.
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Specification