Rechargeable electric portable appliance
US4374354A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1981 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Jun 23, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S336/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric toothbrush housing contains a motor, a battery and a secondary coil coupled to charge the battery. An elongated magnetic core is disposed within that secondary coil. A well is defined in a base which receives a portion of the housing within which the secondary coil is positioned. In that base is a primary coil for inducing magnetic energy into the secondary coil. Disposed within the primary coil is an elongated stud of magnetic material. It is aligned axially with the core, so that respective end portions are mutually adjacent. One of those end portions is generally cup shaped and the other is formed and relatively oriented to nest within the first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.