Electric toothbrush
US9937027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2013 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | Jan 20, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C17/222
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An electric toothbrush comprises a toothbrush handle (1), a toothbrush rod (2) and a toothbrush head. The toothbrush head comprises a left-rotating hairbrush and a right-rotating hairbrush (3, 3′), which are oppositely and rotatably fixed on a toothbrush shaft (4). The right end of the toothbrush shall (4) is arranged in a shaft hole at the upper end of the toothbrush rod (2) and is axially positioned on the shaft hole through the right-rotating hairbrush (3′) and a shaft cap arranged at the right end of the toothbrush shaft (4); and the bristles of each of the left-rotating hairbrush and the right-rotating hairbrush (3, 3′) comprise an inner ring of bristles and an outer ring of bristles (6, 6′, 7, 7′).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.