Patent ID: 7431354
Filing Date: 2008-10-07
Classification: E05B,Y10T

Abstract:
1. A door lock comprising: a lock case, a latch bolt having a body part at least partly within the lock case and at least one outwardly tapering wedge-shaped headpiece pivotably supported by the body part and extending at least partly from the lock case so that the latch bolt may be pressed into the lock case from either side thereof in the direction of door opening or closing due to a force acting upon said at least one wedge-shaped headpiece, a first spring urging the latch bolt to a position protruding from the lock case, an auxiliary bolt, a second spring urging the auxiliary bolt to a position protruding from the lock case, a guide element which is movable relative to the lock case between a position in which it provides deadlocking of the latch bolt and a position in which it permits the latch bolt to be pressed into the lock case to its retracted position, and a stop member supported by the auxiliary bolt, which stop member is movable relative to the auxiliary bolt between a position in which the stop member acts upon the guide element and prevents the guide element moving to the position providing deadlocking of the latch bolt, while the auxiliary bolt is in its protruding position, and a position in which the stop member allows the guide element to move to its position providing the deadlocking of the latch bolt, and wherein the stop member is urged by a spring to the position in which it allows the guide element to move and the stop member allows the guide element to move to the position providing deadlocking of the latch bolt only in case both the auxiliary bolt and the latch bolt are first moved to their retracted positions.