Patent ID: 8458913

Claim:
An assisted-opening folding knife, comprising: a blade provided with a first post, the first post being adjacent to an end of the blade; a handle comprising a first plate and a second plate, wherein the first plate and the second plate are pivotally provided with a pivot adjacent to an end of the first plate and the second plate such that a portion of the blade that is adjacent to the end thereof is pivotally connected between the first plate and the second plate by the pivot, there being a first spring mounted around the pivot, the first spring having two ends fixed respectively to the blade and the handle so as to generate a torque tending to rotate the blade out of the handle, the first plate being provided with a first recess adjacent to the pivot so that, while the blade is being rotated to be received between the first plate and the second plate, the first post of the blade is moved along the first recess, the first plate being further provided with a first positioning groove; a second post provided on the blade, the second post being exposed from the handle when the blade is received in the handle; a pushing device comprising a pushing element and a second spring, the pushing element having a first portion located in, corresponding in configuration to, and hence retained within the first positioning groove, thus allowing the pushing element to move along the first positioning groove toward the pivot, the pushing element further having a second portion so configured that, while the blade is being rotated to be received between the first plate and the second plate, the first post presses against the second portion of the pushing element and thereby moves the pushing element away from the pivot, the second spring being disposed between the pushing element and the first positioning groove so that, once the first post moves past a tip of the second portion of the pushing element, and the blade is completely received in the handle, the second spring pushes and hence restores the pushing element to a position adjacent to the pivot, so as for the second portion of the pushing element to block the first post and for the blade to be received and positioned between the first plate and the second plate; and an upper cover fixedly provided on the first plate to cover the first positioning groove.