Patent ID: 7407199
Filing Date: 2008-08-05
Classification: E05B,E05C,Y10S,Y10T

Abstract:
1. A self-latching sash latch device including a latch body having a primary bolt, a strike, the primary bolt being mounted for sliding movement in said body between a latching position where, in use, the primary bolt engages in a latching configuration with the strike and a retracted position, and an operating element operatively coupled to the primary bolt to enable the primary bolt to be moved from the latching position to the retracted position, a retaining means to retain the primary bolt in the retracted position and a secondary bolt movably engaged with the primary bolt to be moveable together with the primary bolt and relative to the primary bolt, the secondary bolt has a leading end which has a first engagement surface which is exposed for contact with a part of the strike when the primary bolt is moved to the retracted position by the operating element, whereby contact between the first engagement surface and said part of the strike during relative movement between the body and strike causes the secondary bolt to move relative to the primary bolt to the position where the secondary bolt effects release of the retaining means to release the primary bolt and enable the primary bolt to move from the retracted position to the latching position.