Patents by Inventor Francisco Javier Esquerra Barraza

Francisco Javier Esquerra Barraza 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).

  • Combination locks with improved code-changing features
    Patent number: 9003844
    Abstract: A combination locking arrangement includes a locking member, at least first and second tumbler discs, a dial, and a code change mechanism. When each of the tumbler discs is rotated to an unlocking orientation, the locking member is movable from a locking position to a releasing position. The dial is rotatable about a tumbler disc axis for selective rotation of the at least first and second tumbler discs. The dial includes a clutch rotationally securable in interlocking engagement with the first tumbler disc. The code change mechanism is rotatable to a code change position to separate the clutch from the first tumbler disc, such that the dial is subsequently rotatable to rotate the clutch with respect to the first tumbler disc.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: April 14, 2015
    Assignee: Master Lock Company LLC
    Inventors: Francisco Javier Esquerra Barraza, Victor Manuel Vergara Carrizoz, Maria Dolores Ruiz Huguez, Ivan Gonzalez Ramos, Ricardo Valenzuela, Sebastian Gonzalez Zertuche