Patent ID: 8387420
Filing Date: 2013-03-05
Classification: D06F,F16F

Abstract:
1. A drum type washing machine having a suspension supporting a water tub in a vibration isolated manner, the water tub accommodating a drum, the suspension comprising: a cylinder; a magnetic field generator fixed in the cylinder and generating a magnetic field in a variable manner; a pair of magnetic members provided at both axial sides of the magnetic field generator respectively; a smart fluid including a magneto-rheological fluid retained on an inner surface of the magnetic field generator; a sealing member which is fixed in the cylinder so as to be located below the magnetic field generator, thereby preventing leakage of the smart fluid so that the smart fluid is retained; and a shaft which is supported so as to be axially reciprocable relatively along the magnetic field generator, the magnetic members, the smart fluid, and the sealing member such that reciprocation of the shaft does not substantially displace the smart fluid: wherein the magnetic field generator generates a magnetic circuit including the cylinder and the shaft.