Patent ID: 7540092

Claim:
A utility knife comprising: an elongated housing having a pair of opposite side faces and a rear edge forming support and position surfaces for the fingers of a user of the knife, the housing further being formed with a longitudinal guide passage open at a longitudinal end of the housing, respective transversely oppositely open side cutouts on the side faces, and a transversely open back cutout on the rear edge; a blade holder longitudinally shiftable in the housing; a blade fitted to the holder and having a cutting edge directed forward away from the rear edge, the holder being longitudinally shiftable between a use position with the blade projecting from the housing front end and a retracted position with the blade inside the housing; two transversely oppositely projecting side actuating formation and one rear actuating formation coupled to the blade holder and exposed at the side and rear cutouts such that the blade can be actuated by a user's fingers via any of the actuating formations; and a spring in the housing urging the holder and blade into the retracted position.