Abstract: A safety utility razor knife is normally maintained in a locked closed condition which protects the user or carrier from accidental injury by the blade. No action on the part of the user or carrier is required to lock the protective hood over the blade. The hood pivots into the open position, exposing the razor blade, when the knife is in use, and automatically self-locks the safety hood immediately after use, requiring no action or adjustment on the part of the user. The knife is designed for easy and convenient use in cutting cartons, and other materials, including but not limited to dry wall, floor coverings, and insulation, etc. The hood is unlocked by the user's thumb by moving a slide forward. The amount of blade exposed may be determined by a hood stop on the shoulder of the knife, or as regulated by the depth of cut cam action dial. This insures that only enough blade is exposed for the task at hand, i.e.

Abstract: A safety utility razor knife is normally maintained in a locked closed condition which protects the user or carrier from accidental injury by the blade. No action on the part of the user or carrier is required to lock the protective hood over the blade. The hood pivots into the open position, exposing the razor blade, when the knife is in use, and automatically self-locks the safety hood immediately after use, requiring no action or adjustment on the part of the user. The knife is designed for easy and convenient use in cutting cartons, and other materials, including but not limited to dry wall, floor coverings, and insulation, etc. The hood is unlocked by the user's thumb by moving a slide forward. The amount of blade exposed may be determined by a hood stop on the shoulder of the knife, or as regulated by the depth of cut cam action dial. This insures that only enough blade is exposed for the task at hand, i.e.

Abstract: An improved utility razor safety knife is disclosed. The knife hood is normally in the closed position where the blade is protected. The hood may be locked in the closed position by a sliding hood lock. The hood pivots into the open position, exposing the razor blade, when the knife is in use. The hood is stabilized in its movement and biased toward the closed position by a yoke with two legs which is attached to an arm on the handle. Springs on the yoke bias the hood toward the closed position. Springs of varying gauges may be used to vary the closing impulse on the hood. The legs of the yoke exert their influence through footing pieces which are received by socket-bearing footing rests attached to the sides of the hood. The footing rests stabilize the knife in an upright position when the knife is resting on a surface and also stabilize the razor blade during cutting.