Patent ID: 6766672
Filing Date: 2004-07-27
Classification: E05B,Y10T

Abstract:
A combination lock comprising:a lock housing having a housing chamber, the lock housing extending in a longitudinal direction; a shackle connecting to the lock housing and being movable in the longitudinal direction relative to the lock housing to an unlocked position and a locked position; a lock shaft located in the housing chamber being movable in a direction perpendicular to the longitudinal direction relative to the lock housing to a first position to constrain the shackle at the locked position and to a second position to release the shackle from the constraint of movement; an elastic element located in the housing chamber to exert an elastic force on the lock shaft to keep the lock shaft at the first position in normal conditions; a dial connecting to the lock housing in a turnable manner; and at least one retaining ring located in the housing chamber to receive driving of the dial to move to an interference position to stop the lock shaft from moving to the second position and to move to a release position to allow the lock shaft moving to the second position, the at least one retaining ring being mounted on and rotatable about the lock shaft.