Patent ID: 7055415

Claim:
A screwdriver assembly for rotationally driving a tool to thereby threadedly connect a workpiece screw and having a torque measuring scale, comprising: a screwdriver handle having an elongated axis and a first end and a second end with said ends spaced apart on said axis and said handle having a hollow interior between said ends, a member connected to said handle first end to be without rotation relative to said handle and a cap connected to said handle second end and being rotatable about said axis and relative to said handle, said cap and said member being spaced apart along said axis, a beam spring disposed in said handle interior and extending axially therealong and being completely fully disposed within the spacing between said member and said cap and having two ends respectively adjacent said handle ends and having a first one of said spring ends fixedly connected to said member to be without rotation relative to said handle and having a second one of said spring ends fixedly non-rotatably connected to said cap to be rotatable relative to said handle, a tool attaching member connected to said spring at said second end of said spring and being capable of holding said second end of said spring against rotation in an initial position in response to tightening the workpiece screw, a torque scale and a marker respectively connected with said cap and said handle and being coaxially disposed on said axis and having an initial marking aligned with said initial position, and one of said scale and said marker rotatable with said handle for indicating the amount of rotation of said handle beyond said initial position upon tightening the workpiece screw.