Textiles: fluid treating apparatus – Machines – Tumbling
Reexamination Certificate
2003-12-23
2008-11-25
Stinson, Frankie L (Department: 1792)
Textiles: fluid treating apparatus
Machines
Tumbling
C068S024000, C068S058000
Reexamination Certificate
active
07454930
ABSTRACT:
A drum-type washing machine is provided, by which a rotational speed of a drum is stably and accurately controlled during washing and dewatering by adopting a simple induction motor and a set of unidirectional bearings acing as a clutch. The drum-type washing machine, which has a motor having a stator and a rotor for rotating a drum to perform washing and dewatering, includes an outer housing fixed to the stator of the motor; a gear shaft, extending from a center of the rotor of the motor, for transferring a rotational force of the motor; a drum shaft, extending from a center of the drum, for receiving the rotational force of the motor; a gear-reduction mechanism, interposed between and coupled respectively to the gear shaft and the drum shaft, for reducing a rotational speed of the gear shaft and transferring the reduced rotational speed to the drum shaft, the gear-reduction mechanism having an outer surface enabling rotation with respect to the outer housing; a first set of bearings for supporting the gear-reduction mechanism in the outer housing, at least one of the first set of bearings enabling rotation in a first direction while checking rotation in a second direction; and a second set of bearings for supporting the gear shaft and drum shaft in the gear-reduction mechanism, at least one of the second set of bearings enabling rotation in the second direction while checking rotation in the first direction.
REFERENCES:
patent: 2161604 (1939-06-01), Watts
patent: 2174662 (1939-10-01), Josephs, Jr.
patent: 2399319 (1946-04-01), Bowen et al.
patent: 2538620 (1951-01-01), Heinrich
patent: 2771794 (1956-11-01), Shenk et al.
patent: 2836046 (1958-05-01), Smith
patent: 3257830 (1966-06-01), Shelton
patent: 3813828 (1974-06-01), Bennett
patent: 3840764 (1974-10-01), Burger
patent: 5187954 (1993-02-01), Kim et al.
patent: 5373715 (1994-12-01), Sharp et al.
patent: 7028512 (2006-04-01), Chang
patent: 7086254 (2006-08-01), Lim et al.
patent: 39 27 426 (1991-02-01), None
patent: 2 202 867 (1988-10-01), None
patent: 2202867 (1988-10-01), None
patent: 64-49599 (1989-02-01), None
patent: 2-74293 (1990-03-01), None
patent: 2001100438 (2001-11-01), None
patent: WO 02/40761 (2002-05-01), None
Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Stinson Frankie L
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