Patent ID: 7997109
Filing Date: 2011-08-16
Classification: E05B,Y10T

Abstract:
1. A disengageable cylinder for a motor vehicle lock mechanism, comprising: a fixed stator; a tubular intermediate sleeve which is mounted in rotation about its axis in the stator and which is fixed axially with respect to the stator; a rotor which is mounted in rotation in the sleeve, which is fixed axially in the sleeve and which comprises tumblers which can move radially under the action of a key intended to be inserted axially into the rotor, the rotor and the intermediate sleeve being blocked against rotation with respect to one another by the tumblers when the key is not appropriate, a driver providing a coupling between the rotor and a cam actuator, when the key is appropriate; and an indexer which can move axially between a rest position and a disengagement position, under the effect of a rotation of the sleeve with respect to the stator subsequent to the rotor being rotated by means of an inappropriate key, so as to move the driver axially toward a disengaged position, wherein the indexer and the driver are cylindrical parts surrounding the rotor and can move while bearing on one another, wherein the driver is connected in disengageable rotation on the rotor, wherein the indexer is connected in translation in the stator by means of ribs surrounding the intermediate sleeve, and wherein the indexer, which is rotationally immovable, is coupled in rotation with the cam actuator in said disengaged position, thereby blocking the cam actuator from rotation in said disengaged position.