Method and apparatus for laser beam control of backhoe digging depth
US4231700A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1979 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | Apr 9, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/26
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention provides a method and apparatus for controlling the digging depth of the bucket of a backhoe or an excavator so as to move the digging edge of the backhoe bucket in a plane parallel to an overhead reference plane defined by a rotating laser beam. The detecting means for the laser beam is mounted on a medial portion of the downreach boom and the control of the position of the bucket is accomplished by moving the outreach boom of the backhoe relative to the supporting platform so as to maintain the detecting means on the downreach boom in a fixed relationship with respect to the reference plane defined by the rotating laser beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.