Patent ID: 6374650
Filing Date: 2002-04-23
Classification: E05B,Y10T

Abstract:
A lock mechanism including, a deadbolt which is movable between an operative position and an inoperative position, first and second independently operable rotatable actuators, a gear train through which each said actuator is drivably connected to said deadbolt and which includes first and second drive gears and first and second driven gears, said first and second drive gears being arranged for relative rotation about a common axis and being drivably connected to said first and second actuators respectively, said driven gears forming respective parts of a rotatable composite gear, said first and second drive gears cooperating with said first and said second driven gears respectively so that said composite gear rotates in response to rotation of either said drive gear, drive means drivably connecting said composite gear to said deadbolt so that the deadbolt moves between said operative and inoperative positions in response to rotation of said composite gear, and said first and second drive gears cooperate with their respective driven gears in a manner such that said deadbolt moves from one said position to the other in response to 360Â° rotation of said first actuator and moves from one said position to the other in response to substantially less than 360Â° rotation of said second actuator.