Patent ID: 8601836

Claim:
A laundry treatment machine comprising: a case comprising a fabric entrance hole on a top thereof; a washing tub rotatably disposed inside the case; and a lint filter disposed at an inner wall of the washing tub and filtering out debris from washing water, the lint filter comprising: a lower filter provided with a lower side entrance opened toward a circumferential direction of the washing tub allowing washing water rotating in the circumferential direction to flow into the lint filter; an upper filter disposed at an upper side of the lower filter and communicating with the lower filter to allow washing water rising from the lower filter while the washing tub is rotating to flow into the upper filter; and a check valve configured to open or close the lower side entrance, the check valve being opened when the washing tub rotates in an opened direction of the lower side entrance and being closed when the washing tub rotates in a direction opposite to the opened direction of the lower side entrance.