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US 5,752,783 AGranted
Paver with radar screed control
AssigneeBlaw-Knox Construction Equipment Corporation
InventorKerry Malone
Life of this patent
Estimating the term…
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.
Claims26
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.
2 more elements
A paver comprising:
- 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.
6 more elements
A paver comprising:
- 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.
5 more elements
Dependencies are inferred from the claim text.