Patent ID: 8209807

Claim:
A device ( 1 ) for automatically cleaning a surface submerged in a liquid, designed to be connected to a pump, comprising: a hollow head ( 2 ) having a seat ( 11 ); and first ( 5 a ) and second ( 5 b ) suction hoses opening onto said hollow head ( 2 ), wherein the seat ( 11 ) delimits a space in which a flap valve ( 4 , 41 , 42 ) is housed, said flap valve ( 4 , 41 , 42 ) being adapted to cooperate with said seat ( 11 ) so as to adopt first and second closing positions in which it respectively closes the first ( 5 a ) and second ( 5 b ) suction hoses when said device ( 1 ) is operating, wherein a sieve ( 9 ) is arranged inside the hollow head ( 2 ) so as to avoid the flap valve ( 4 , 41 , 42 ) from being stuck by any debris in said space, wherein said flap valve ( 41 , 42 ) is at least partially hollow, wherein the flap valve ( 41 , 42 ) comprises a spacer ( 50 ) arranged between the first ( 41 a , 42 a ) and second ( 42 a , 42 b ) faces thereof, and wherein a length of said spacer ( 50 ) is adjustable.