Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Manipulation of liquid
Reexamination Certificate
1999-01-26
2001-06-05
Stinson, Frankie L. (Department: 1743)
Bleaching and dyeing; fluid treatment and chemical modification
Fluid treatment
Manipulation of liquid
C068S207000, C068S142000, C068S23500R
Reexamination Certificate
active
06241781
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a washing machine, and more particularly to a washing machine with a rotating wash tub mounted in an outer tub for washing and spin-dry.
2. Description of the Prior Art
Generally, a washing machine is mounted with a wash tub in an outer tub and the wash tub is disposed therein with a pulsator, where the wash tub remains stationary and only the pulsator is rotated to form a water current in the washing water for washing of laundry.
Recently, a washing machine has been developed having a rotating wash tub which rotates during washing process.
A conventional washing machine having a rotating wash tub is disposed, as illustrated in
FIG. 1
, with a body
1
, an outer tub
3
mounted in the body
1
, a rotating wash tub
5
provided in the outer tub
3
for washing and spin-dry of laundry while it is rotated, and a pulsator
7
mounted on an inner floor of the rotating wash tub
5
for generating a turbulent current in the washing water and for applying a water power to the laundry for pulsation and washing thereof.
The pulsator
7
in the conventional washing machine having a rotating wash tub thus constructed is rotated left and right in the rotating wash tub
5
while the rotating wash tub
5
is rotated to form a water current therein to perform the washing and rinsing processes.
However, there is a problem in the conventional washing machine having a rotating wash tub thus described in that formation of water current in the rotating wash tub is weak, and washing and rinsing are executed, most of the case, by the water current made by rotation of the pulsator, to thereby reduce washing and rinsing performances.
SUMMARY OF THE INVENTION
The present invention is disclosed to solve the aforementioned problems and it is an object of the present invention to provide a washing machine constructed and arranged to eject the washing water contained in between an outer tub and a rotating wash tub into the rotating wash tub to thereby improve the washing and rinsing performances.
In accordance with the object of the present invention, there is provided a washing machine including an outer tub disposed within a body of the washing machine, a rotating wash tub disposed within the outer tub for being rotated to wash and spin-dry the laundry, and a pulsator disposed on an inner bottom floor of the rotating wash tub for alternatively rotating left and right, the washing machine further having a plurality of ducts mounted on a periphery of the rotating wash tub for the washing water contained in between the outer tub and the rotating wash tub to be induced and ejected into the rotating wash tub when the rotating wash tub is rotated, where the duct is coupled along the circumferential direction of the rotating wash tub and is gradually enlarged in sectional area thereof as it goes towards an inlet thereof, the inlet of the duct formed to face oppositely to rotating direction of the rotating wash tub and an outlet thereof being coupled to a nozzle through which the washing water is ejected into an inner side of the rotating wash tub, where an ejected hole of the nozzle faces the circumferential direction or a central direction of the rotating wash tub.
It should be noted that in a washing machine having a rotating wash tub which alternatively rotates left and right, a first and a second duct, each having an inlet facing oppositely are constructed to be so coupled that the washing water existing in between an outer tub and a rotating wash tub can be always infused into the rotating wash tub regardless of rotating directions of the rotating wash tub, where, it is preferable that the first and second ducts are positioned, each at a different height in order not to obstruct the infusing water and back flow prevention unit are provided at each outlet of the first and second ducts in order to prevent the washing water from flowing backward to the outer tub through the first and second ducts when the washing water does not flow into the rotating wash tub.
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Bushnell , Esq. Robert E.
Samsung Electronics Co,. Ltd.
Stinson Frankie L.
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