Patent ID: 7117554

Claim:
A self-propelling rolling swimming pool cleaning apparatus and transmission device for cleaning a submerged surface comprising a motor housing ( 1 ) with at least one drive shaft ( 2 ) enclosed therein; the transmission device, connected to the motor housing ( 1 ), transmitting the rotary driving movement of the at least one driving shaft ( 2 ), carried by the apparatus, to running members ( 13 , 14 , 57 ) rotatable around transverse axes of rotation in order to drive the apparatus in displacement, which device is formed of a lateral transmission casing ( 6 ) comprising: a rigid housing ( 20 ), an input journal ( 27 ) mounted so as to be freely rotatable around an axis of rotation with respect to the rigid housing ( 20 ), and provided with means ( 31 ) for demountable coupling to the at least one driving shaft ( 2 ) of the apparatus, likewise the at least one drive shaft being provided with means ( 32 ) for demountable coupling mating with the demountable coupling means ( 31 ) of the input journal ( 27 ), this input journal ( 27 ) being adapted to be coupled to the at least one driving shaft ( 2 ) when the casing is mounted on the apparatus, at least one output journal ( 33 , 34 ) mounted so as to be freely rotatable around a transverse axis of rotation with respect to the rigid housing ( 20 ), and provided with means ( 41 , 42 ) for demountable coupling to a running member ( 13 , 14 ), carried by the apparatus, rotatable around a transverse axis of rotation, outside the casing ( 6 ), the said running member ( 13 , 14 ) likewise being provided with means ( 46 , 47 ) for demountable coupling mating with the demountable coupling means of the output journal ( 33 , 34 ), this output journal ( 33 , 34 ) being adapted to be coupled to the said running member ( 13 , 14 ) when the casing ( 6 ) is mounted on the apparatus, means ( 48 , 49 , 57 ) for transmission of the rotary driving movement between the input journal ( 27 ) and each output journal ( 33 , 34 ), the rigid housing ( 20 ) bearing and guiding the journals ( 27 , 33 , 34 ) and the transmission means ( 48 , 49 , 57 ), and demountable mounting means ( 22 to 26 ) adapted to enable the rigid removable fixing, allowing mounting and demounting, of the casing ( 6 ) in a single-piece assembly on one side of the apparatus, the input journal ( 27 ) being coupled to the at least one driving shaft ( 2 ) and each output journal ( 33 , 34 ) being coupled to a running member ( 13 , 14 ).