Washing machine having a plurality of concentrically formed recessed portions on the tub
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United States of America Patent
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Jan 9, 2018
Grant Date -
Apr 10, 2014
app pub date -
Oct 10, 2013
filing date -
Oct 10, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A washing machine including a washing tub to allow enhancement in washing efficiency. A washing tub of the washing machine includes a pattern having a protrusion portion to generate friction force between laundry and the washing tub and to thereby increase washing efficiency. The pattern has a concave-convex structure and performs action similar to a lifter, washing efficiency may be enhanced using tumbling generated by the pattern. A plurality of drain holes are arranged in a certain pattern in the washing tub to prevent a dehydration bottleneck phenomenon in which dehydration is concentrated at a particular drain hole and to increase a dehydration rate. The pattern is provided such that protrusion portions and recessed portions continue on the surface of the washing tub to enhance stiffness of the washing tub.
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