Patent ID: 6439623
Filing Date: 2002-08-27
Classification: E05B,Y10S,Y10T

Abstract:
Motor vehicle door lock comprising:a lock latch having a main catch and a preliminary catch; a detent pawl which keeps the lock latch in the main catch and in the preliminary catch postions; an electrical closing drive including an electric motor which is actuated after the lock latch has reached a preclosing position wherein the detent pawl retains the lock latch in the preliminary catch position, and which then transfers the lock latch, utilizing the electric motor, into a main closing position with the detent pawl retaining the lock latch in the main catch position; an electric opening drive which is adapted to raise the detent pawl of the main catch or to raise the preliminary catch of the lock latch; wherein the electric motor of the electrical closing drive includes a step-down gear, which is coupled to a drive element on the lock latch by means of a coupling; wherein the coupling, adjacent the lock latch, can be selectively electrically decoupled; and, wherein the coupling has a mechanical coupling element which is operable by the electric opening drive and can be raised, in an emergency situation, for decoupling by a correspondingly controlled actuation of the electric opening drive to interrupt the chain of force from the closing drive to the lock latch.