The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2010
Filed:
Aug. 24, 2007
Hong Seok Ko, Yongin-si, KR;
Gyu Sung NA, Suwon-si, KR;
Seung Ju Choi, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
A method controls tub oscillation in a drum type washing machine by utilizing a ball balancer. The method includes maintaining an rpm of a drum in a predetermined rpm level for a predetermine period of time during a dehydration operation, thereby reducing a differential rotation speed between the drum and a ball, and re-increasing the rpm, such that the tub is not subject to the oscillation that is greater than a predetermined level. The drum type washing machine adopts a single race having different ball sizes and viscosities, so that the manufacturing cost of the washing machine is reduced. The tub is prevented from being subject to oscillation greater than a predetermined level through precise calculation.