Refrigeration case motion detector
US8269628B2 · kind B2 · utility
1Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2009 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | May 9, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A triple-sensor motion detector is provided for illuminating the approach to a display case or other object. The triple-sensor motion detector provides a field of detection that spans the front width of the case, yet does not include the areas along the sides of the case. The detector reduces inadvertent triggering of the illumination by persons approaching the side of the case or approaching another case on the other side of an aisle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.