Engageable article using permanent magnet
Stopper using a magnet
Clasp utilizing attractive force of permanent magnet
Magnetic lock closure
Magnetic closing button for handbags and the like Patent #: 5042116
ApplicationNo. 937762 filed on 09/01/1992
US Classes:24/303, HAVING MAGNETIC FASTENER292/251.5, MAGNETIC335/285Work or object holding type
ExaminersPrimary: Sakran, Victor N.
Attorney, Agent or Firm
Foreign Patent References
International ClassesA44B 021/00
Foreign Application Priority Data1990-12-11 JP
AbstractThe 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 portions of the surfaces of the permanent magnet to which the first ferromagnetic member is not contacting the permanent magnet, excluding the peripheral surface of the through-hole or including the peripheral surface at the mouth of the through-hole, are covered with a ferromagnetic casing or a ferromagnetic material, such as a ferromagnetically plated sheet, having the thickness of about 0.03 to 0.20 mm.