Magnetic latch

Details Magnetic latch Magnetic latch

1992-11-06

1995-03-28

Brittain, James R.

Buckles, buttons, clasps, etc.

Having magnetic fastener

H01F 702

Patent

active

054004799

ABSTRACT:
A magnetic latch includes a first member having a protrusion and a second member engaging the protrusion to prevent the first member and the second member from sliding relatively to one another. The second member includes a first magnet to attract the first member and a first solid non-magnetic member located inside a cavity of the first magnet to enhance attraction between the first member and the second member. The second member can be provided with a backing plate to facilitate a magnetic flux path from the magnet to the magnet aperture. The second member can also include a second magnet to attract the first member and a second solid non-magnetic member located between the first magnet and the second magnet. A third solid non-magnetic member can be provided on the outer periphery of the magnets. This design provides a latch with stronger holding power.

REFERENCES:
patent: 2812203 (1957-11-01), Scholten
patent: 2884698 (1959-05-01), Wursch
patent: 3372443 (1968-03-01), Daddona, Jr.
patent: 3618174 (1971-11-01), Schainholz et al.
patent: 3919743 (1975-11-01), Cutler
patent: 4021891 (1977-05-01), Morita
patent: 4453294 (1984-06-01), Morita
patent: 4455719 (1984-06-01), Morita
patent: 4458396 (1984-07-01), Aoki
patent: 4700436 (1987-10-01), Morita
patent: 4754532 (1988-07-01), Thomson et al.
patent: 4825526 (1989-05-01), Shenier et al.
patent: 5251362 (1993-10-01), Riceman et al.

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