Patent ID: 6990877
Filing Date: 2006-01-31
Classification: B25B

Abstract:
1. A torque wrench comprising: a pressure handle provided internally with a hollow hole; a sheath end provided at one side of the pressure handle, and comprised of an assembly groove; said assembly groove having a threaded hole at a bottom thereof, while one side of said assembly groove opposite to said pressure handle is connected to said hollow hole; a directional brake module mounted within said assembly groove and comprised of a sheath rod, a brake section and a control unit, said sheath rod crossing through said threaded hole while said control unit adjusts direction of said brake section; an overload movement ring provided between said brake section and said assembly groove, an interior of said overload movement ring having a circular tooth rim for articulation of said brake section and an exterior as a polygon; wherein a containment groove is provided at an intersection of various surfaces penetrating both sides thereof, an exterior of various containment grooves having a reducing aperture corresponding to a wall of said assembly groove; a rolling rod and rolling bead provided within various containment grooves at the exterior of overload movement ring, each end of a rolling rod having a rolling bead, outer flanks of various rolling rods and rolling beads protruding from an aperture of said containment groove and keeping in close contact with said wall of said assembly groove; and a spring bolster provided within said hollow hole and comprised of a movable shore and a spring; wherein one end of said movable shore is supported by said spring while an opposite end has a bolster that crosses over said assembly groove and supports a surface corresponding to the exterior of the overload movement ring.