Patent ID: 6213737
Filing Date: 2001-04-10
Classification: F04D,F16C,F16F

Abstract:
A damper device comprising:a magnet having magnetic poles;at least two yokes facing said magnetic poles of said magnet across gaps;said magnet and said at least two yokes jointly providing a magnetic flux circuit such that a magnetic flux flowing from a first magnetic pole of said magnet is divided across one of said gaps into magnetic fluxes which flow into entrance sides of said yokes and back from exit sides of said yokes across another of said gaps into a second magnetic pole of said magnet;said at least two yokes being mechanically connected rigidly to each other; andspring means elastically holding said gaps between said magnetic pole and said sides of said yokes; one of said magnet and said yokes being adapted to be connected to a vibratable member;whereby when said gaps are differentially varied in length by vibration of said vibratable member, the divided magnetic fluxes are changed to generate eddy currents in said yokes and said magnetic poles.