Patent ID: 8161653

Claim:
A folding tool comprising: a handle defining a track; an implement pivotably connected to the handle for moving between a closed position and an open position; and a lock for retaining the implement in the open position, the lock comprising: a pivotable member configured to pivot relative to the handle between first and second positions; and an engagement member disposed within the track and configured for movement with the implement through the track, the engagement member also configured to engage the pivotable member upon movement of the implement from the closed position to the open position in order to move the pivotable member from the first position toward the second position; wherein the pivotable member is configured to return to the first position once the implement is in the open position in order to secure the implement in the open position, and wherein the pivotable member comprises a cam member configured to pivot about a pivot point, wherein the cam member comprises a curved surface spaced from the pivot point by a distance that increases from a first edge of the cam member to a portion of the cam member spaced from the first edge of the cam member, wherein the engagement member is configured to engage the first edge and the curved surface during movement of the implement from the closed position to the open position, wherein in the first position the pivotable member at least partially overlies the track, and wherein in the second position the pivotable member moves away and is spaced apart from the track so as to no longer overlie the track.