Patents by Inventor Jian-Gju Yu

Jian-Gju Yu 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).

  • Clutch transmission mechanism of printing device
    Patent number: 8366097
    Abstract: A clutch transmission mechanism of a printing device includes a power input shaft, a power input gear, a gear-shifting arm, a first gear-shifting module and a second gear-shifting module. In the cooperation of these components and modules, the printing device can be operated in a first gear-shifting mode or a second first gear-shifting mode. When the printing device can be operated in a first gear-shifting mode or a second first gear-shifting mode, the clutch transmission mechanism coaxially transmits the driving force. As such, the stability of transmitting the driving force is enhanced.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: February 5, 2013
    Assignee: Primax Electronics Ltd.
    Inventors: Tung-Wen Tu, Jian Zeng, Jian-Gju Yu
  • Sheet pick-up device of automatic document feeder
    Patent number: 8162312
    Abstract: A sheet pick-up device of an automatic document feeder is provided. The sheet pick-up device includes a two-way clutch transmission mechanism, a sheet pick-up arm, a stopper and a linking assembly. When the two-way clutch transmission mechanism is operated to have the sheet pick-up arm move to a standby position, the stopper is moved with the linking assembly to be in a stopping position. Whereas, when the two-way clutch transmission mechanism is operated to have the sheet pick-up arm move to a sheet pick-up position, the stopper is in a non-stopping position. The sheet pick-up device has enhanced operating stability.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: April 24, 2012
    Assignee: Primax Electronics Ltd.
    Inventors: Tung-Wen Tu, Jian Zeng, Jian-Gju Yu
  • SHEET PICK-UP DEVICE OF AUTOMATIC DOCUMENT FEEDER
    Publication number: 20110316219
    Abstract: A sheet pick-up device of an automatic document feeder is provided. The sheet pick-up device includes a two-way clutch transmission mechanism, a sheet pick-up arm, a stopper and a linking assembly. When the two-way clutch transmission mechanism is operated to have the sheet pick-up arm move to a standby position, the stopper is moved with the linking assembly to be in a stopping position. Whereas, when the two-way clutch transmission mechanism is operated to have the sheet pick-up arm move to a sheet pick-up position, the stopper is in a non-stopping position. The sheet pick-up device has enhanced operating stability.
    Type: Application
    Filed: September 20, 2010
    Publication date: December 29, 2011
    Applicant: PRIMAX ELECTRONICS LTD.
    Inventors: Tung-Wen Tu, Jian Zeng, Jian-Gju Yu
  • CLUTCH TRANSMISSION MECHANISM OF PRINTING DEVICE
    Publication number: 20110198181
    Abstract: A clutch transmission mechanism of a printing device includes a power input shaft, a power input gear, a gear-shifting arm, a first gear-shifting module and a second gear-shifting module. In the cooperation of these components and modules, the printing device can be operated in a first gear-shifting mode or a second first gear-shifting mode. When the printing device can be operated in a first gear-shifting mode or a second first gear-shifting mode, the clutch transmission mechanism coaxially transmits the driving force. As such, the stability of transmitting the driving force is enhanced.
    Type: Application
    Filed: June 21, 2010
    Publication date: August 18, 2011
    Applicant: Primax Electronics Ltd.
    Inventors: Tung-Wen Tu, Jian Zeng, Jian-Gju Yu