Patent ID: 6959494
Filing Date: 2005-11-01
Classification: B26B

Abstract:
1. In a folding knife having a handle portion and a blade mounted for pivotal movement about an axis adjacent to one end of said handle portion between a fully closed and a fully open position, means for assisting in movement of said blade to said open position, said assisting means comprising: a) a tang portion formed integrally with said blade and through which said axis passes; b) a camming member extending outwardly from said tang portion in a direction parallel to and spaced from said axis, said camming member including a camming surface having an arcuate portion substantially coaxial with said pivot axis that is eccentric relative to and extending between rounded ends movable through a predetermined path as said blade is moved about said axis; and c) a cantilever spring having a first end anchored to said handle portion, and a second, free end having a terminal portion positioned to engage said camming surface throughout at least a first portion of said predetermined path and to exert a biasing force urging said blade toward said fully open position over a second portion of said predetermined path.