Fastener means

Details Fastener means Fastener means

1991-11-13

1992-09-01

Sakran, Victor N.

Buckles, buttons, clasps, etc.

Having magnetic fastener

2922515, 335285, A44B 2100

Patent

active

051427460

ABSTRACT:
The present invention relates to a fastener means which utilizes the attraction force of a permanent magnet and which is characterized in that a ferromagnetic member attached to one of the magnetic pole surfaces of an annular permanent magnet constituting the fastener means and having a through-hole extending between the magnetic poles and a ferromagnetic member attached to the other magnetic pole are detachably attracted to each other via said through-hole and that the surfaces of the permanent magnet to which said ferromagnetic members are not attached, excluding the inner peripheral surface of the through-hole or including the inner peripheral surface of the through-hole at its mouth, are covered with a ferromagnetic casing or a ferromagnetic material such as ferromagnetically plated sheet having the thickness of from 0.03 to 0.20 mm.

REFERENCES:
patent: 4453294 (1984-06-01), Mortia
patent: 4455719 (1984-06-01), Morita
patent: 4480361 (1984-11-01), Morita
patent: 4700436 (1987-10-01), Morita
patent: 4779314 (1988-10-01), Aoki
patent: 4991270 (1991-02-01), Aoki
patent: 5042116 (1991-08-01), Ossiani

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