Permanent magnet assembly for stably fixing denture
US5337033A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1992 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Jan 15, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C13/235
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A permanent magnet assembly for stably fixing a denture comprising a permanent magnet, a casing made of a corrosion-resistant, magnetic material having a cavity for receiving the permanent magnet, and a seal plate for covering an opening of the casing to prevent the permanent magnet from exposing outside, the seal plate consisting of a seal ring member made of a corrosion-resistant, non-magnetic material and a disc plate made of a corrosion-resistant, soft-magnetic material and having substantially the same outer diameter as the inner diameter of the seal ring member, the seal ring member and the disc plate being concentrically arranged in the same plane, the disc plate being welded to the seal ring member in their abutment, and the seal ring member being welded to the casing. Laser welding is utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.