Patent ID: 6237379
Filing Date: 2001-05-29
Classification: E05B,Y10T

Abstract:
A lock system comprising:a housing;a barrel rotatable in the housing about an axis from a center position;tumblers radially displaceable in the barrel and housing between an unlocked position permitting the barrel to rotate in the housing from the center position and a locked position blocking rotation of the barrel in the housing and retaining the barrel in the center position;an actuating element rotatable in the housing about the axis and juxtaposed with an inner end of the barrel;lock members operable by the actuating elements;a switch in the housing operable by the barrel on displacement from the center position;an electric motor operable by the switch to rotate the actuating element and thereby mechanically operate the lock members; anda key fittable in the barrel and displaceable axially therein through an axial stroke between an outer position and an inner position, the key being formed with bit surfaces extending axially through a distance equal at least to the stroke and being engageable with the tumblers to hold the tumblers in the unlocked position in both the inner and outer key positions, the key having a tip projecting in the inner key position into the actuating element and rotationally coupling the actuating element to the barrel and standing clear of the actuating element in the key outer position and decoupling the actuating element from the barrel, whereby in the inner position the key can turn the actuating element directly while in the outer position the actuating element can only be turned by the motor.