Vibration damping apparatus containing magnetic spring device
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United States of America Patent
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app pub date -
Jun 12, 2003
filing date -
Jun 2, 2000
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Abandoned
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Abstract
A magnetic spring device and a vibration damping apparatus, which are simpler and cheaper to manufacture, are disclosed. The magnetic spring device includes a plurality of stationary magnets, which are spaced apart to define a space between them, and a magnetic movable element, which is fit in the space. The magnetic poles of the stationary magnets are opposite to each other. The movable element is moved by the magnetic force generated by the stationary magnets in a parallel direction with the magnetic field. The properly positioned stationary magnets and movable element form a magnetic spring device, which together with additional properly positioned magnets alone may be used as a vibration damping apparatus. Also, when the magnetic spring device is combined with a cushioning member such as a metal spring, rubber or the like to form a vibration damping apparatus, the total elastic constant of the vibration damping apparatus may be near zero.
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