Soil compaction device having a light detector
US6794632B1 · kind B1 · utility
4Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Jun 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05G2009/04759
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention relates to an operating device which is provided for operating an appliance and which comprises a hand-actuated operating part on which at least one light detector is provided in the gripping area of the hand. The light detector and an evaluating circuit make it possible to detect when a hand is approaching the guide handle or when the hand is gripping the same. The evaluating circuit accordingly activates a control device which optionally places the appliance in operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.