Patents by Inventor Jong Oh Ra

Jong Oh Ra 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).

  • Continuously variable transmission with controlling brakes
    Patent number: 5062823
    Abstract: A variable transmission includes an input shaft with an input sun gear mounted thereon and a differential gear carrier rotatably mounted thereon to enable independent rotation about input shaft. A transmission shaft is coaxially mounted on input shaft. A differential gear carrier is rotatably mounted on the transmission shaft. A plurality of pins interlink carriers to enable simultaneous rotation. A first differential gear is rotatably mounted on each pin, and each gear is meshed with an input sun gear. A control ring gear is rotatably mounted on the transmission shaft with the controlling gear meshed with each differential gear. A plurality of rods rotatably secures each carrier to enable rotation about its axis and to enable simultaneous rotation of the carriers. An output shaft terminating in an output ring gear is rotatably mounted relative to the input shaft. A second differential gear is rotatably mounted on each rod and is meshed with the gear differential and output ring gear.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: November 5, 1991
    Inventors: Jong Oh Ra, Joon Young Lim