Laser beam control system for earthworking or similar machines
US3953145A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1975 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Mar 12, 1995 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/4873
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for controlling the elevation of the working tool of an earthworking machine, or the pavement distributor head of a mobile road-paving machine, in predetermined relationship to a fixed horizontal plane, as set by a laser beam which is periodically swept across the working area, such apparatus comprising a tape-dispensing device carried by the machine and arranged to intermittently advance the tape past a tape reader; the tape carrying two sets of indicia, one set indicating whenever a change in the height of the tool is required at a particular point in the travel of the machine, and the second set of indicia indicating the distance between such points, there being a ground-engaging wheel measuring the travel of the machine and connected to the tape-dispensing device to advance the tape to the next set of indicia whenever the machine arrives at the next one of said predetermined points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.