Patent ID: 7694542
Filing Date: 2010-04-13
Classification: E05B,G07C,Y10T

Abstract:
1. A combination lock, comprising: a casing having a notch; a drive cylinder inside the casing having a surface at one end, the surface having an opening centered along a longitudinal centerline of the drive cylinder and a registration element off-centered from the longitudinal centerline; a rotatable drive shaft mounted inside the drive cylinder and along the longitudinal centerline of the drive cylinder, the drive shaft having a notched end that is accessible through the opening but that does not extend outside the drive cylinder; a drive disk secured to the drive shaft such that the drive disk rotates with the drive shaft, the drive disk having a gate; at least five disks, each of the disks rotatable about said drive shaft upon a driving force initiated by the drive disk, each of the at least five disks having a gate; a side bar connected to the drive cylinder and located within the notch of the casing when the gates of the drive disk and the at least five disks are not aligned, the side bar being able to exit the notch and enter each of the gates of the at least five disks and of the drive disk when all of the gates are in alignment and the drive cylinder is rotated.