Patent ID: 9505141
Filing Date: 2016-11-29
CPC Classification: B26B

Claim Text:
1. A folding knife, comprising: a handle defined by 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 groove extending radially away from the bore on one side of the blade; a torsion spring around the pivot shaft, said spring having a first end fixed relative to the handle and a second end; a switch movable between first and second positions, said switch having a surface that in the first position engages the second end of said spring so that said spring is disengaged from the blade, and wherein when said switch is in the second position said surface is disengaged from said spring and said spring is in the groove in the blade and said spring exerts pressure on said blade.