Sliding Door Locks

The specification discloses a sliding door or window lock structure (10) having a latch housing (11) adapted, in use, to be mounted to a sliding door or window, the lock structure (10) being cooperable with a latch or striker plate (26) mountable to or forming part of a door or window surround, the lock structure (10) having at least one rotatable latch hook (42) rotatable between a first withdrawn position at least substantially positioned within the latch housing (11) and a second extended latching position wherein operative parts (43) of the or each latch hook (42) extends beyond the latch housing (11), the lock structure (10) further having a lock structure operating mechanism (9) including a movable slide rack (56) for operatively moving the or each said latch hook (42) between the first and the second positions, said lock structure (10) still further having either at least one forwardly extending projection (31, 32) or at least one recess (98, 99) facing, in use, the latch or striker plate (26), said latch or striker plate (26) including at least one recess (98, 99) or at least one projection (31, 32) facing, in use, toward said lock structure (10) whereby, in a closed position, at least one said projection (31, 32) on one of said lock structure (10) or said latch or striker plate (26) engages a recess (98, 99) within the other of said lock structure (10) or latch or striker plate (26) to prevent the door or window moving vertically relative to the door or window surround in said closed position, the latch or striker plate (26) further having a latch formation (100, 101) positioned to allow a free hooked end part (43) to be located behind said latch formation (100, 101) in the second position of the or each said rotatable latch hook (42). 57 5 58 -5G 2+ 33 36 27 -7 e0 1 6 12 3q