(19)
(11) EP 2 719 809 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.08.2015 Bulletin 2015/32

(43) Date of publication A2:
16.04.2014 Bulletin 2014/16

(21) Application number: 13187765.6

(22) Date of filing: 08.10.2013
(51) International Patent Classification (IPC): 
D06F 37/04(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 10.10.2012 KR 20120112649

(71) Applicant: Samsung Electronics Co., Ltd
Gyeonggi-do 443-742 (KR)

(72) Inventors:
  • Jang, In Cheol
    Gyeonggi-do (KR)
  • Kim, Ji Sung
    Gyeonggi-do (KR)
  • Bang, Eun Suk
    Gyeonggi-do (KR)
  • Sul, Nam Ki
    Gyeonggi-do (KR)
  • Lee, In Ju
    Gyeonggi-do (KR)
  • Jeong, Seong Su
    Ulsan (KR)
  • Kwak, Bong Wha
    Gyeonggi-do (KR)
  • Kim, Doo Pil
    Gyeonggi-do (KR)
  • Park, Ki Sun
    Gyeonggi-do (KR)
  • Park, Jong Sung
    Seoul (KR)
  • Choi, Ji Hoon
    Gyeonggi-do (KR)

(74) Representative: Walaski, Jan Filip 
Venner Shipley LLP 200 Aldersgate
London EC1A 4HD
London EC1A 4HD (GB)

   


(54) Washing machine


(57) A washing machine including a drum capable of improving washing efficiency is provided. The washing machine includes a body (10), a tub (20) provided at an inside the body to store wash water, a drum (30) rotatably provided at an inner side of the tub to accommodate laundry, a driving apparatus (14) to rotate the drum, protrusions (34) that are formed of polygons having polygonal shapes and protruding inward from the drum, and a through-hole (36) provided between adjacent protrusions (34) to drain water. A protrusion having polygons generates frictional force between laundry and the drum, thereby increasing the washing power. The through-holes (36) are uniformly located around the protrusion (34), thereby preventing a spin dry water bottleneck phenomenon that occurs when water from a spin dry is concentrated on a certain through-hole, and thus enhancing the spin dry efficiency.







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