Moisture indicator for wet pick-up suction cleaner
US6812847B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2000 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Jul 10, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L11/4058
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The moisture sensor and indicator for a wet pickup vacuum cleaner, more particularly a wet extraction type carpet cleaner, is positioned in the suction duct to sense when water droplets or moisture is traveling through the suction duct. An indicator is activated to indicate to the operator that water is being extracted from the carpet. The sensor may alternatively be located in the bottom of the floor-engaging portion where it contracts the floor. When the degree of moisture in the carpet exceeds a predetermined threshold an indicator is activated to indicate to the operator that the floor is still wet and to continue extracting moisture from the floor. Alternatively, the moisture sensor can be used as a safety device on a dry pickup vacuum cleaner. When moisture is detected within the suction duct, the motor-fan assembly of the dry pickup vacuum cleaner is disabled to prevent a potentially hazardous condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.