Utility knife with improved blade locking feature

摘要

A utility knife of the type having a replaceable blade held in a blade holder and used for cutting carpeting, trimming wallpaper and other related uses. The blade holder comprises a handle which can be gripped when using the tool, the handle including an internal recess for containing the blade as well as a slide member having dove-tail edges cooperating with a tapered guideway and a thumb grip on the slide member projects through an opening in the handle to allow the user to readily move the slide member. The cooperation between the dove-tail edges on the slide member and the tapered guideway causes a clamping force to be imparted to the blade, locking it in a desired preset position.