Patent ID: 6813833
Filing Date: 2004-11-09
Classification: B26B

Abstract:
A utility knife comprising:a handle having a cavity and a forward opening, a bottom opening, a top opening, and a rear opening; a bottom release lever pivotally mounted to said handle and movable with respect to said handle within said bottom opening; a top drive lever pivotally mounted to said handle and movable with respect to said handle; a working blade holder slidably disposed within said cavity of said handle; a working blade supported by said working blade holder and movable with respect to said handle within said forward opening; a spring-biased toggle linkage connected to said working blade holder and said handle, adapted to extend upon pivoting of said top drive lever toward said handle; an extra blade holder slidably mounted to said handle and movable with respect to said handle within said rear opening; said extra blade holder includes a front support end for engagement with said working blade; whereby slidable displacement of said extra blade holder outward from said handle disengages said support end from said working blade to allow removal of said working blade from said utility knife.