Patent ID: 6557387
Filing Date: 2003-05-06
Classification: E05B,Y10S,Y10T

Abstract:
An electric motor actuator for a motor vehicle lock that can be switched into an â€œunlockedâ€ , â€œlockedâ€  and â€œlocked-antitheftâ€  operating state, said electric motor actuator comprising:a reversible drive motor; an actuator drive driven by said reversible drive motor and having two end positions; an operating lever dynamically coupled to said actuator drive for switching said motor vehicle door lock into said â€œunlockedâ€  and â€œlockedâ€  operating states, wherein said operating lever, at least in one end position of said actuator drive, is free to be mechanically switched between said â€œunlockedâ€  and â€œlockedâ€  operating states; an antitheft lever dynamically coupled to said actuator drive for maintaining said operating lever in said â€œlockedâ€  operating state, said antitheft lever having the operating states â€œantitheftâ€  and â€œantitheft-off,â€  the operating state â€œantitheftâ€  of the antitheft lever together with the operating state â€œlockedâ€  of the operating lever defining the operating state â€œlocked-antitheftâ€  of the actuator, said antitheft lever being spring-loaded towards the â€œantitheftâ€  operating state by a pretensioning mechanism, wherein said pretensioning mechanism is adapted to switch said antitheft lever from said â€œantitheft-offâ€  operating state into said â€œantitheftâ€  operating state, wherein said antitheft lever is maintained in the â€œantitheft-offâ€  operating state against the force of the pretensioning mechanism on the one hand by a control crank mounted on said actuator drive and on the other hand by the operating lever in its â€œunlockedâ€  operating state; a catch mechanism mounted on said actuator drive, said catch mechanism being positioned proximal to the antitheft lever in its â€œantitheftâ€  operating state while said actuator drive is in said â€œlockedâ€  operating state and holding said antitheft lever in its â€œantitheftâ€  operating state; and an emergency actuating mechanism for mechanically moving said antitheft lever from its â€œantitheftâ€  operating state into its â€œantitheft-offâ€  operating state overcoming the catch mechanism while said actuator drive is in said â€œlockedâ€  operating state, wherein said catch mechanism then mechanically holds the antitheft lever in the â€œantitheft-offâ€  operating state against the force of the pretensioning mechanism.