Paving machine having automatic metering screed control
US5588776A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Dec 31, 1996 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C2301/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A paving machine having a sensor-controlled concrete metering screed. The machine includes hydraulic cylinders which move the metering screed to various elevations to control the depth of concrete being metered out by the screed. At least one ultrasonic sensor is slide-mounted to the machine above and behind the metering screed to provide measurements of the distance between the sensor and the surface of the concrete just behind the screed. A control system compares the sensor measurements with a tolerance range of distances corresponding to the desired depth of concrete. When the sensor measurements are out of tolerance, the control system moves the metering screed up or down to bring the distance, and the metered depth of concrete, back within tolerance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.