Patent ID: 7748122

Claim:
A folding knife, comprising, a handle having first and second handle halves held in a spaced apart relationship to define a blade groove therebetween; a blade pivotally connected between the handle halves with a pivot shaft extending through a bore in a tang portion of the blade so that the blade is movable in a rotational path between an open position and closed position, said blade having a first side and a second side and a first annular recess around the bore on the first side of said blade and a first radial groove extending away from the bore; a first bushing fixed to said first handle half and the bushing having an inner edge to the annular recess; a first torsion spring around the pivot shaft, said first torsion spring having a first leg fixed relative to the handle and a second leg in the first radial groove during only a portion of the rotational path.