Electric toothbrush
US4974278A · kind A · utility
57Cited by
2References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Feb 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1804
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An electric toothbrush has a gear driven by a motor. On the face of the gear is an eccentric pin upon which a sliding member is located. The eccentric pin engages with a socket in a lever which is securely connected to a brush rod. The lever is moved up and down and simultaneously oscillates due to the rotational movement of the eccentric pin so that the brush rod executes a corresponding movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.