US 2003/0154606 A1Published application

Utility knife

AssigneeNottingham-Spirk Design Associates, Inc., an Ohio corporation

InventorsCraig M. Saunders, Jeffrey R. Kalman, Todd A. Spiegelberg

Life of this patent

Estimating the term…

Loading patent…

Abstract

An improved utility knife with an ergonomically shaped handle having a cavity and a working blade holder slidably disposed within the cavity is described. A bottom release lever and a top drive lever are pivotally mounted to the handle and movable with respect to the handle for releasing and moving the working blade holder, respectively. The knife includes an extra blade holder slidably mounted to the handle and movable with respect to the handle within the cavity. The extra blade holder includes a front support end for engagement with a working blade, whereby slidable displacement of the extra blade holder disengages the support end from the working blade to allow removal and replacement of the working blade from the utility knife.

Claims12

Dependent claims

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.

6 more elements

Dependencies are inferred from the claim text.