Permanent magnet assembly for stably fixing denture

Details Permanent magnet assembly for stably fixing denture Permanent magnet assembly for stably fixing denture

1992-01-15

1994-08-09

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

433189, H01F 702, A61C 13235

Patent

active

053370333

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.

REFERENCES:
patent: 4530663 (1985-07-01), Portnoy
patent: 4815975 (1989-03-01), Garrel et al.
patent: 5013243 (1991-05-01), Tanaka et al.
"The Application of Rare Earth Magnetic Retention to Osseointegrated Implants," Thomas R. Jackson, The International Journal of Oral and Maxillofacial Implants, vol. 1, No. 2, 1986.

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