Electronically commutated drive system for vacuum cleaner
US7076830B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2003 |
| Grant date | Jul 18, 2006 |
| Priority date | — |
| Expiry date | Jul 11, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L9/2852
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A self-propelled appliance, such as a vacuum cleaner includes a magnetic field sensor and magnet. A relative position between the magnetic field sensor and the magnet can be changed by a user of the appliance. The magnetic field sensor generates a signal indicating a magnetic field sensed by the sensor. Therefore, the magnetic field sensor signal indicates the relative position of the magnet to the sensor. This relative position signal is interpreted as a speed and direction request for a means for propelling the appliance. The magnetic filed sensor is, for example, a Hall effect sensor. The means for propelling includes, for example, a brushless d.c motor, sensorless motor or switched reluctance motor. Forward and reverse propulsion is provided without the use of a clutch. The appliance includes a reduced number of wearing components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.