Patent ID: 7784189

Claim:
A knife comprising: an elongated housing having a front end and formed with a longitudinally extending passage that has a pair of confronting inner surfaces and that opens at the front end; a blade holder longitudinally shiftable in the passage between a front blade-change position projecting past the front end and a rear position, the blade holder having a base-body with a inner face, and a latch part having a inner face and displaceable relative to the base-body between a holding position closely juxtaposed with the base-body inner face and a releasing position spaced from the base-body inner face; an operating element connected to the holder and exposed through the housing for actuation of the holder from outside the housing; and a blade between the inner faces of the blade holder and gripped thereby in the holding position of the latch part, the inner surfaces of the housing being spaced and shaped such that they bear inwardly on the latch part and the base body when the blade holder is rearward of the front blade-change position to hold the latch part in the holding position but in the blade-change position allow the latch part to move into the releasing position.