Electric toothbrush with linear oscillator
US7328474B2 · kind B2 · utility
8Cited by
6References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2003 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | May 25, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K33/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric toothbrush includes a drive part, a driver, a brush part and a vibration-absorber. The drive part includes a drive shaft provided to be lineally movable and a brush part detachably attached to one end of the drive shaft. The driver is configured to apply reciprocal force to the drive shaft to reciprocally lineally move the drive shaft. The vibration-absorber is connected to the drive shaft via a second spring to be lineally movable along the drive shaft. A weight ratio of a weight of the vibration-absorber to a weight of the drive part is at least 0.9 and at most 1.1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.