Replacement brush head for an electric toothbrush
US9439741B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2014 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Feb 13, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C17/3436
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A replacement head for an electric toothbrush has a simplified drive construction and desired bristle carrier retention. The replacement head includes a tubular neck with a head at one end and a brush shaft disposed within the neck. An eccentric extension extends from the brush shaft parallel with the longitudinal axis and an axial extension extends parallel to the eccentric extension. The eccentric extension engages the bristle carrier to drive the bristle carrier. The brush shaft, including the eccentric extension and the axial extension, may be formed together as a single unitary piece. A pin may extend through pin retention openings in the head and a pin slot in the bristle carrier in a direction transverse to both the longitudinal axis and the carrier rotation axis to retain the bristle carrier on the head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.