Patent ID: 9259258
Filing Date: 2016-02-16
CPC Classification: A61B,B25B

Claim Text:
1. A torque-controlled screwdriver for medical use, comprising: a hollow manoeuvring body, coaxially housed within which are a first bushing and a second bushing provided with respective front toothings for mutual torsional coupling under the action of an axial-thrust spring; the first bushing being connected in rotation to the manoeuvring body and the second bushing driving in rotation a tool projecting from the manoeuvring body; said front toothings being configured so as to disengage from one another, against the action of said thrust spring, when the screwing torque applied by the manoeuvring body to the tool exceeds a predetermined threshold value; and safety means for enabling a free rotation of a pre-set angular amplitude of the manoeuvring body with respect to the tool in the opposite direction to that of screwing, wherein said safety means are arranged between the second bushing and the tool, wherein said safety means include a third bushing carrying the tool and coupled frontally in rotation with the second bushing with angular play corresponding to said pre-set angular amplitude.