Apparatus and method for controlling a hydraulic excavator
US5682311A · kind A · utility
Inventor
Key dates
| Filing date | Nov 17, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Nov 17, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/26
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A depth measuring apparatus for an excavator which includes an inclination sensor assembly mounted along the pivot axis between the stick arm boom and the bucket, a depth sensor mounted along the same pivot axis as well as a laser receiver for receiving a radiation establishing a reference level mounted coaxially with the pivot axis between the stick arm boom and the bucket such that after the reference level has been established, and the laser receiver is impinged by radiation each time it passes through the reference level, thereby zeroing out the measuring apparatus, the actual depth of a trench may be measured with respect to the reference level by considering the inclination of the bucket as well as the depth displayed by the depth sensor when the bucket is lowered into the trench.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.