Permanent magnetic lifting device
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United States of America Patent
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Jun 24, 2014
Grant Date -
Jan 31, 2013
app pub date -
Feb 12, 2010
filing date -
Feb 12, 2010
priority date (Note) -
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Abstract
The present invention provides a kind of permanent magnetic lifting device, which has: a housing, at the bottom of which is a clamping surface for clamping objects; fixed magnet(s), set in housing relatively fixed to housing; a turnable magnet, set in housing relatively turnable to fixed magnet. When turnable magnet is in the first position relative to fixed magnet, the magnetic force generated by fixed magnet and turnable magnet to clamping surface is zero magnetic force; when turnable magnet is in the third position relative to fixed magnet, the magnetic force generated by fixed magnet and turnable magnet to clamping surface is the maximum magnetic force. The permanent magnetic lifting device also has a positioning mechanism for second position to position the turnable magnet in the second position relative to fixed magnet, fixed magnet and turnable magnet generate trial clamping magnetic force to clamping surface for clamping objects on trial.
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