Infrared remote control for soil compacting devices
US5450068A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1993 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Jun 24, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C25/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An infrared remote-controlled soil compacting device is controlled such that the device cannot be set into operation as long as the operator with the sending unit is within close vicinity of the soil compacting device so that an accidental operation or propelling in the wrong direction is prevented. This is achieved by providing an infrared close range radiation in addition to the infrared control radiation required for the operational control of the device. The close range radiation has a substantially reduced intensity relative to the control radiation so that the close range radiation can be received within the receiving unit only within close vicinity of the sending unit. When the close range radiation is received within the receiving unit the generation or release of electric signals affecting propelling of the soil compacting device is suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.