Patent ID: 7281442

Claim:
A reduction gearbox for a motor vehicle starter, the gearbox comprising: a crown including: an outer crown part having a radially inner peripheral face and at least one first recess formed on the radially inner peripheral face, and an inner crown part mounted coaxially in the outer crown part and provided with an internal set of teeth in mesh with the planet wheels of the reduction gearbox the inner crown part having a radially outer peripheral face and at least one second recess formed in the radially outer peripheral face, at least one seating formed between the first and second recesses, the at least one seating being provided with at least one abutment face, at least one shock-absorbing damping element having a length and thickness and disposed in the at least one seating, each recess having a depth measured radially which increases in a direction of relative angular displacement between the two crown parts along the corresponding radially peripheral face, to a value substantially equal to the thickness of the damping element so that the at least one seating has a thickness and a length substantially equal respectively to the thickness and the length of the damping element.