Magnetic closure with an opening-assisting spring
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United States of America Patent
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Oct 7, 2014
Grant Date -
Jul 14, 2011
app pub date -
Jul 12, 2008
filing date -
Jul 12, 2007
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A magnetic closure comprises a magnet-armature structure having a magnet and an armature, the magnet and the armature being constituted such that, for an automatic closing, the armature and the magnet mutually attract each other in a closing direction below a predetermined minimum distance, and, for an opening, the magnet is laterally shifted or rotated with respect to the armature into an open position so that the surfaces of magnet and armature facing each other in a mutually attracting manner become smaller, whereby the force of attraction between magnet and armature comes smaller, Further, an opening-assisting spring is provided for assisting the opening, wherein the opening-assisting spring either is automatically pretensioned by the magnetic force during the automatic closing, or is pretensioned during the opening operation.
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