Extractor with light-sensitive stain sensor
US8719998B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 2011 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | May 12, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L2201/06
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A light-sensitive stain sensing system for an extractor for detecting and treating biological stains, such as food or pet stains. The stain sensing system comprises an ultraviolet light-emitting element, a visible light-emitting element, and at least one light reader. Ultraviolet and visible light beams are reflected off the surface to be cleaned into a light reader that measures reflectance values and transmits the values to a processor. The processor compares a relative reflectance value to a predetermined threshold value. The presence of a biological stain is indicated when the relative reflectance value is greater than the threshold value, and may trigger a controller to automatically adjust one or more cleaning parameters of the extractor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.