Patent ID: 8499460

Claim:
A spring-assisted folding knife, comprising: a one-piece knife blade having a proximal end and including a receiver on one side of the proximal end having a through bore; a rotatable blade insert comprising a separate piece of material than the blade and having a rear surface configured to be seated into the receiver, an opposite front surface, and a central bore extending between the rear surface and the front surface; a coil spring received on the rear surface of the blade insert, the coil spring having a first end secured to the blade insert and an opposite second end secured to a fixed rigid surface of the knife; and a pivot extending through the through bore of the blade, the central bore of the insert, and the coil spring; wherein, the coil spring serves to assist opening of the blade of the knife from a closed position to an open position, and the blade insert rotates as the blade goes between the closed position and the open position.