Patents by Inventor YU-EN KAO

YU-EN KAO 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).

  • Patent number: 9931737
    Abstract: A ratchet wrench with efficient driver changing function includes a wrench body having a head and a handle, a first slot passing through the first side and connected with a second slot; a ratchet ring, rotatable disposed in the first slot and having a polygonal inner hole for receiving a driver; a direction switching member, disposed in the second slot and having a rotating operation mode and a pressing operation mode; a ratchet block, disposed between the first slot and the second slot that when the direction switching member is at the rotating operation mode, the ratchet ring is driven unidirectionally; a top lid, fixed on the head; and a position limiting plate disposed between the top lid and the head that when the direction switching member is at the pressing operation mode, the position limiting plate engages or disengages the driver.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: April 3, 2018
    Inventor: Yu-En Kao
  • Publication number: 20170182638
    Abstract: A ratchet wrench with efficient driver changing function includes a wrench body having a head and a handle, a first slot passing through the first side and connected with a second slot; a ratchet ring, rotatable disposed in the first slot and having a polygonal inner hole for receiving a driver; a direction switching member, disposed in the second slot and having a rotating operation mode and a pressing operation mode; a ratchet block, disposed between the first slot and the second slot that when the direction switching member is at the rotating operation mode, the ratchet ring is driven unidirectionally; a top lid, fixed on the head; and a position limiting plate disposed between the top lid and the head that when the direction switching member is at the pressing operation mode, the position limiting plate engages or disengages the driver.
    Type: Application
    Filed: December 28, 2015
    Publication date: June 29, 2017
    Inventor: YU-EN KAO