Brakes – Internal-resistance motion retarder – Using magnetic flux
Reexamination Certificate
2005-10-18
2005-10-18
Graham, Matthew C. (Department: 3683)
Brakes
Internal-resistance motion retarder
Using magnetic flux
C188S129000, C188S267100, C267S196000, C267S134000
Reexamination Certificate
active
06955248
ABSTRACT:
Disclosed are a combination type damper and a washing machine having the same. The combination type damper comprises: a cylinder provided with a receiving space having a certain depth at one side thereof; a rod relative-movably inserted into the receiving space of the cylinder; and a composite damping means for generating a damping force by an electromagnetic force when a displacement of a relative movement of the cylinder and the rod is less than a preset length, and for generating a frictional damping force when the displacement of the relative movement is more than the preset length. Transient state vibration and steady state vibration generated from a tub assembly during the entire processes for washing laundry are prevented from being transmitted to a cabinet, thereby minimizing vibration noise towards outside while using the washing machine.
REFERENCES:
patent: 5392881 (1995-02-01), Cho et al.
patent: 5549182 (1996-08-01), Ehrnsberger et al.
patent: 6202806 (2001-03-01), Sandrin et al.
patent: 6378671 (2002-04-01), Carlson
patent: 0 965 675 (1999-12-01), None
patent: WO01/273375 (2001-04-01), None
Jun Cha-Seung
Park Gwan-Ryong
Birch & Stewart Kolasch & Birch, LLP
Graham Matthew C.
LG Electronics Inc.
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