Patent ID: 6487943
Filing Date: 2002-12-03
Classification: B25B

Abstract:
A torque-limiting screwdriver comprising a screw-engaging shank disposed in a handgrip, and a torque-limiting element for transmitting a screw-tightening torque between the handgrip and the shank and preventing the torque from exceeding a predetermined value, the improvement wherein the shank includes a rear end engaging the handgrip for transmitting axial force from the handgrip to the shank; the shank including teeth spaced from the rear end; a spring arranged to yieldably urge the torque-limiting element into rotation transmitting relationship with the teeth, wherein the torque-limiting element includes a cylinder having teeth at its rearward end and splines along its exterior cylindrical surface, the splines being in rotation-transmitting relationship with the handgrip, and the teeth being in rotation-transmitting relationship with the teeth of the shank.