Patent ID: 6125670
Filing Date: 2000-10-03
Classification: E05B,Y10T

Abstract:
A self-locking lock for a door, comprising:a bolt which is spring biased into an advanced locking position;a slide plate movable to a position in which the slide plate arrests the bolt in a retracted position;an auxiliary swing catch which releases the arrest of the bolt when the door is fully closed; anda lock swing catch spring biased into an advanced locking position and cooperable with the slide plate for retaining the slide plate in a position to arrest the bolt in a retracted position, wherein the lock swing catch has a catch bushing or roller cooperating with the slide plate and on which movement of the slide plate can be arrested,wherein the lock swing catch includes a swing catch part mounted thereon and movable between a retracted position in which the swing catch part fits within the lock swing catch and an advanced position in which the swing catch part widens the lock swing catch, andmeans for causing the bolt to lead compared with the lock swing catch and the lock swing catch to lag behind the auxiliary swing catch on opening the door, so that the slide plate and bolt are arrested by the lock swing catch until the auxiliary swing catch arrests the slide plate and the bolt.