Patent ID: 7472571

Claim:
A two-handled lock comprising: a locking housing unit; a handle unit including an outside handle mounted rotatably on said lock housing unit, an inside handle mounted rotatably on said lock housing unit, and a handle-connecting rod connected to and co-rotatable with said inside handle, said outside handle defining a receiving chamber and having at least one notch; and a lock-controlling mechanism including: a key-operated lockset mounted to said outside handle, a rotary knob mounted to said inside handle, a lock-connecting rod rotatable by said key-operated lockset and said rotary knob, a driven seat disposed rotatably within said receiving chamber in said outside handle and co-rotatable with said handle-connecting rod, said driven seat being formed with an open-ended slot, and a first engaging plate disposed movably within said slot in said driven seat and having a retaining portion, said first engaging plate being connected to said lock-connecting rod in such a manner to move in said slot in said driven seat as a result of rotation of said lock-connecting rod relative to said lock housing unit, said first engaging plate being movable between a connection position whereat said retaining portion of said first engaging plate projects from said slot in said driven seat into said notch in said outside handle so as to allow for co-rotation of said handle-connecting rod with said outside handle, and a retracted position whereat said retaining portion of said first engaging plate is retracted into said slot in said driven seat so as to prevent co-rotation of said handle-connecting rod with said outside handle.