Patent ID: 8667870
Filing Date: 2014-03-11
Classification: B25B,B25G

Abstract:
1. A multi torque limiting driver apparatus comprising: a driver arm having a pivot mounting hole formed adjacent one end, a free end opposite said one end and a driver spindle mounting means spaced from said pivot mounting hole extending completely through said driver arm transverse to a longitudinal axis of said driver arm for retaining a driver spindle, said driver spindle mounting means having at least two spaced apart mounting positions positioned along the longitudinal axis of said driver arm for retaining the driver spindle to transfer fastener tightening torque to a fastener, and a locking detent formed at said one end, wherein said driver mounting means is at least two spaced apart driver spindle sockets of common shape and size formed in said driver arm, each said socket being located at one of said at least two mounting positions; a locking element engaging said locking detent; a load applicator generating a selected load onto said locking element; a handle having a finger groove formed therein, said handle being pivotally attached to said driver arm at said pivot mounting hole to maintain a constant distance between said free end and said pivot mounting hole wherein said finger groove is spaced from said pivot mounting hole and said at least two mounting positions are at different distances from said finger groove; and whereby said locking detent, said locking element and said load applicator cooperate to prevent relative movement between said driver arm and said handle when a tightening force applied at said finger groove is less than a pre-determined value and cooperate to permit relative movement between said driver arm and said handle when the tightening force applied at said finger groove is at said pre-determined value.