Patents by Inventor Zhijun Shao

Zhijun Shao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Mechanical dial combination lock
    Patent number: 7216518
    Abstract: A mechanical dial combination lock for use in safes, file cabinets, security doors, vaults and warehouse doors. The disk type mechanical combination lock features a plurality of annular code discs, a base disc, a latch, an unlatching mechanism, a positioning mechanism, a dialing mechanism, a repositioning mechanism, a code-detecting mechanism, a casing and a dial. The dial combination lock is easily operated by persons familiar with conventional dial-face type combination locks, and yet is may be operated faster, and permits the combination code to be easily changed to any of a greater number of possible code combinations.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: May 15, 2007
    Inventor: Zhijun Shao
  • Mechanical dial combination lock
    Publication number: 20050217326
    Abstract: A mechanical dial combination lock for use in safes, file cabinets, security doors, vaults and warehouse doors. The disk type mechanical combination lock features a plurality of annular code discs, a base disc, a latch, an unlatching mechanism, a positioning mechanism, a dialing mechanism, a repositioning mechanism, a code-detecting mechanism, a casing and a dial. The dial combination lock is easily operated by persons familiar with conventional dial-face type combination locks, and yet is may be operated faster, and permits the combination code to be easily changed to any of a greater number of possible code combinations.
    Type: Application
    Filed: May 26, 2005
    Publication date: October 6, 2005
    Inventor: Zhijun Shao