Patent ID: 7735400

Claim:
A torque releasing clutch for a screw driver blade, said clutch comprising: a connecting rod provided with a central combining hole for receiving a screw driver blade, a group of through holes for receiving torque-releasing balls, and an annular recess provided on an outer surface of said connecting rod; an outer sleeve provided with a central through hole for receiving said connecting rod, an annular groove formed on an inner surface of said outer sleeve for receiving said torque-releasing balls, a male threaded section formed on an outer surface of said outer sleeve, and a through hole formed on the sidewall of said outer sleeve for receiving a depth adjusting ball; and a depth adjusting member provided with a central through hole for receiving said connecting rod, female threads formed on an inner wall of said central through hole of said depth adjusting member for engaging with said male threaded section of said outer sleeve, plural elongated grooves formed spaced apart on said inner wall along an axial direction of said central through hole of said depth adjusting member.