Abstract: A key whose blade is made of interchangeable elements with different bitting, which are mounted by inserting them one into the other along a central shaft which is common to all the elements and is fixed inside the bow or handle of the key. At the free end of the key opposite the bow, the shaft is solid with an end element that bears a locksmith's key code that is specific to a particular production series of keys and corresponding cylinders. Between the bow and the blade, there is a blade base which is integral with the bow and does not have a bitting. In flat keys, particularly those said to be symmetrical, guide ribs will be provided advantageously on the blade base, on the different interchangeable elements and on the end elements of the shaft, to guide the blade into the keyway of the corresponding lock cylinder.

Abstract: A key includes a blade having an axially-extending window formed by an opening through a thickness of the blade between two opposite faces thereof, and a set of rollers mounted in series along the window, with each roller being freely rotatable around a spindle fixed transversely across the window in a width direction of the blade. The key may be a security key designed to cooperate with a pin tumbler cylinder.

Abstract: A key whose blade includes axially a window forming an opening throughout the thickness of the blade between two opposite faces thereof, and a set of rollers mounted in series along the windows with each roller being mounted freely rotating around a spindle fixed transversal to the window. The key could concern security keys designed to cooperate with a pin tumbler cylinder.

Abstract: The invention concerns a key whose blade comprises axially a window (18) forming an opening throughout the thickness of the blade between two opposite faces thereof, and a set of rollers (20) mounted in series along said windows with each roller being mounted freely rotating around a spindle (22) fixed transversal to the window. More particularly, it concerns security keys designed to cooperate with a pin tumbler cylinder.