Patent ID: 8601741

Claim:
A closing device for a vehicle door comprising: an electrical motor with a shaft (A), a worm (V) driven into rotation by said shaft (A), a gear in which said worm (V) is meshed, a transmission that connects said gear to a lock striker of said closing device, an uncoupling device ( 1 ) positioned between said shaft (A) and said worm (V) that couples the shaft (A) to the worm (V) when the shaft rotates and uncouples the shaft (A) from the worm (V) when the shaft is motionless; said uncoupling device ( 1 ) comprising: a support ( 2 ) directly joined to the shaft (A), a flange ( 3 ) connected to said support ( 2 ), a pair of claws ( 5 ) mounted on said flange ( 3 ) and provided with teeth ( 52 ) designed to engage with a toothing of a tooth wheel ( 6 ) joined to said worm (V), and a spring ( 4 ) positioned between said support ( 2 ) and said flange ( 3 ) in such a way to bring the flange ( 3 ) to a position in which the teeth ( 42 ) of said claws do not engage with the toothing of the tooth wheel ( 6 ) joined to the worm when the shaft is not rotating.