Washing machine

Details Washing machine Washing machine

1999-05-26

2001-06-19

Coe, Philip R. (Department: 1746)

Textiles: fluid treating apparatus

Machines

Single tub and automatic sequential operation mechanism

C068S012050, C068S012120

Reexamination Certificate

active

06247339

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a washing machine for cleansing clothes. It relates more particularly to a washing machine that spins a washing basket containing clothes, thereby generating centrifugal force which produces a water stream, and the water stream runs through the clothes, so that soil is removed from the clothes.
BACKGROUND OF THE INVENTION
A conventional washing machine, in general, employs an agitating method. That is, a user puts the clothes into a washing basket doubling as a spin-dryer (hereinafter referred to as a “basket”) in the first place, then supplies water into the basket up to a given level. After that, the user agitates the agitator (pulsator) disposed in the basket to cleanse and rinse the clothes.
The agitating is performed by repeating the steps of clockwise spinning, halting, counterclockwise spinning of the pulsator, halting. Respective periods of clockwise spinning and counterclockwise spinning are determined at a given duration so that the clothes are sufficiently agitated. The halt period is also determined at a necessary time for starting the reverse spin after the agitating has been halted.
In this conventional structure, the pulsator agitates the clothes, and the pulsator contacts the clothes directly or via water, thereby revolving the clothes to be cleansed. This structure produces a powerful cleansing effect; however, the clothes directly contact the pulsator, so that the clothes become vulnerable to damage.
Further, the clothes frequently move and revolve up and down, and left and right, whereby the clothes get entangled in a complicated manner with each other. When the clothes get entangled, the centrifugal force due to spinning the basket in the next step, i.e. dehydrating; is impressed to the clothes, whereby the entangled clothes are forcibly stretched and pressed onto an inside wall of the basket. As a result, the clothes lose their shape, and are hard to take out from the basket after the dehydrating step.
SUMMARY OF THE INVENTION
The present invention addresses the problems discussed above and aims to provide a washing machine where only movements of the water only work to on articles to be cleansed so that the articles are kept free from damage and entanglement.
The washing machine of the present invention comprises the following elements:
(a) a water tub;
(b) a washing basket doubling as a spin-drier rotatably disposed in the water tub;
(c) a driving machine for driving the basket; and
(d) a control device for controlling the driving machine.
The control device is so structured that it spins the basket, and varies centrifugal force applied to the water in the basket in order to cleanse the articles.
The structure discussed above allows the water stream including detergent to run through the fibers of the clothes thereby removing soil from the articles. As such, because the articles receive only the force due to water movement by the centrifugal force, the articles can be cleansed without damage and entangled.


REFERENCES:
patent: 5335524 (1994-08-01), Sakane
patent: 5560061 (1996-10-01), Wentzlaff et al.
patent: 5743115 (1998-04-01), Hashimoto
patent: 6058743 (2000-05-01), Fujii et al.
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patent: 61-328295 (1986-10-01), None
patent: 4-220288 (1992-08-01), None
patent: 5-76685 (1993-03-01), None
patent: 7-116378 (1995-05-01), None

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