Patent ID: 8459070

Claim:
A combination lock comprising: a lock housing; a locking mechanism assembled with the lock housing, the locking mechanism comprising a locking member moveable between a locking position and a releasing position, a locking lever connected to the locking member, and at least first and second tumbler discs rotatable about a post, wherein when each of the at least first and second tumbler discs is rotated to an unlocking orientation, the locking lever engages aligned recesses in the at least first and second tumbler discs for movement of the locking member from the locking position to the releasing position; a dial secured to the lock housing for selective rotation of the at least first and second tumbler discs, the dial including a drive portion rotationally secured in interlocking engagement with the first tumbler disc in one of a plurality of code selecting orientations; and a camming member disposed in the lock housing, the camming member being operable in a code change condition to axially disengage the first tumbler disc from the drive portion of the dial, allowing for rotation of the dial with respect to the first tumbler disc and re-engagement of the dial with the first tumbler disc in another of the plurality of code selecting orientations; wherein the locking lever includes a disc securing portion positioned to prevent axial disengagement of the first tumbler disc from the drive portion of the dial when the locking lever is engaged with the aligned recesses in the at least first and second tumbler discs.