Automatic washing machine with spin drain flow channels and...

Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Manipulation of liquid

Reexamination Certificate

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C068S0030SS, C068S012060, C068S023200, C068S023300, C068S023400

Reexamination Certificate

active

07900305

ABSTRACT:
An automatic washing machine includes a wash basin having a plurality of apertures and an annular liquid reservoir formed at an upper portion of the basin. A plurality of flow channels are arranged around the exterior surface of the wash basin. The plurality of flow channels includes upward flow channels, configured for directing wash liquid extracted from the wash basin into the reservoir under centrifugal force generated in a spin cycle. The plurality of flow channels also includes downward flow channels configured for directing wash liquid from the reservoir to a central drain following the spin cycle. The arrangement avoids the need for an outer wash tub, and at the same time provides stabilization to the wash basin during high speed spins. In another aspect, the wash basin may include wash action ramps provided on a bottom surface of the wash basin and at an upper sidewall of the wash basin. The wash action ramps, in conjunction with a sequence of wash basin acceleration and deceleration cycles, induce an effective wash action, and circulation of the wash load, in lieu of a conventional central agitator.

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Original claim set from copending U.S. Appl. No. 11/610,380, concurrently filed on Dec. 13, 2006.
Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration mailed May 21, 2008 in corresponding International Application No. PCT/US2007/086082, filed Nov. 30, 2007.
Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration mailed May 29, 2008 in International Application No. PCT/US2007/086010, filed Nov. 30, 2007 corresponding to related U.S. Appl. No. 11/610,380.

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