Method and apparatus for brushing teeth with cyclically rotating brush strokes
US5120225A · kind A · utility
147Cited by
3References
16Claims
0Family size
Inventor
Key dates
| Filing date | May 1, 1991 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | May 1, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46B2200/1066
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A toothbrush includes a cluster of rotatable bristle tufts disposed between two longitudinally spaced clusters of positionally fixed bristle tufts. The fixed bristles frictionally engage tooth surfaces to oppose longitudinal movement of the brush head in response to longitudinal reciprocation of the brush handle within the head. A rack and pinion convert the longitudinal reciprocation of the handle to oscillatory rotation of the rotatable bristle tufts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.