Grade indicator for excavation operations
US7857071B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2005 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Aug 10, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/847
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A graphical grade indicator for use in earth moving operations has an improved, variable resolution and a substantially unlimited range. This grade indicator results in a more accurate indication of the position of a cutting blade relative to the desired grade and, as a result, allows a machine operator to more accurately control grading operations. In one embodiment, a graphical grade indicator has a graphical scale with a substantially unlimited range and various indications indicating a desired grade level and at least a first undesirable grade level. When the cutting blade deviates from the desired grade level, a first indication is provided indicating, illustratively, the direction and magnitude of movement of the cutting blade repositioning necessary to achieve the desired grade. The resolution of the graphical scale can be changed in order to provide a desired degree of accuracy in grading operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.