Patents by Inventor Yo C. Chung

Yo C. Chung 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).

  • High efficiency hydraulic jack/air pump
    Patent number: 4746097
    Abstract: An overload protected motor which drives a motor assembly to urge a connector rod up and down. The connector rod has two piston heads connected in line with each other, a large pneumatic piston head to pump air and a smaller hydraulic piston head to pump hydraulic fluid. The pneumatic head reciprocates in an air cylinder which has an air inlet and an air outlet. Both the inlet and the outlet have spring-loaded air stops which allow for one-way passage of air into and out of the air cylinder, respectively.
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: May 24, 1988
    Inventors: Yo C. Chung, Richard Lee
  • Automobile compressor-jack device
    Patent number: 4706937
    Abstract: An automatic compressor-jack device which comprises an air compressor, a hydraulic jack and a transmission mechanism. The transmission mechanism, which is driven by a motor through a reduction gear, comprises an eccentrically disposed pin to connect to the piston rods of the cylinders of the compressor and the jack. Therefore, when the motor rotates, the transmission mechanism drives the air compressor and jack at the same time. That is, this one device allows the user two tire repair functions.
    Type: Grant
    Filed: July 10, 1986
    Date of Patent: November 17, 1987
    Assignee: Richard Lee
    Inventor: Yo C. Chung