Patent ID: 6923027

Claim:
A lock assembly comprising: a casing having a longitudinal chamber and a transverse chamber perpendicular to the longitudinal chamber and a bolt hole defined in the casing to communicate the longitudinal chamber with the transverse chamber; a cylinder assembly mounted securely inside the longitudinal chamber and having a cylindrical space defined inside the cylinder assembly; a rotary bolt driver rotatably received in the cylindrical space of the cylinder assembly and having a crossbar formed on an end face of the rotary bolt driver and extending out of the cylindrical space; and a latching disk linearly and movably received in the longitudinal chamber by the rotational movement of the rotary bolt driver and having a latch bolt extending through the bolt hole in the casing, wherein the latching disk and the longitudinal chamber are so configured that after the latching disk is received in the longitudinal chamber, the latching disk is able to move linearly inside the longitudinal chamber; and a shank having a head formed on a distal end of the shank and a recessed neck adjacent to the head to be selectively aligned with the bolt hole such that when the head is moved into the transverse chamber, the latch bolt is first forced to move toward the rotary bolt driver and after the recessed neck aligns with the latch bolt, the latch bolt is moved toward the recessed neck and when the rotary bolt driver is rotated to move the latching disk, the latching disk is forced to move linearly to secure the shank in the casing.