Patents by Inventor Sang Do NA

Sang Do NA 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).

  • Tire with self-inflation device
    Patent number: 10442259
    Abstract: Provided is a tire with self-inflation device. The tube is inserted inside the side portion where the extension and contraction movements of the tire are mostly occurring in order to further enhance the efficiency of the air supply to the tire cavity during driving. The air compressed towards the driving direction is injected to the tire cavity, and the air from the outside is charged to the tube due to the negative pressure formed in the tube located in the opposite side of driving. The durability is enhanced by reducing the exposed portion of the regulator.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: October 15, 2019
    Assignee: KUMHO TIRE CO., INC.
    Inventors: Seong Jong Park, Sang Do Na, Hyoung Seok Kim, In Chul Sung
  • TIRE WITH SELF-INFLATION DEVICE
    Publication number: 20180178602
    Abstract: Provided is a tire with self-inflation device. The tube is inserted inside the side portion where the extension and contraction movements of the tire are mostly occurring in order to further enhance the efficiency of the air supply to the tire cavity during driving. The air compressed towards the driving direction is injected to the tire cavity, and the air from the outside is charged to the tube due to the negative pressure formed in the tube located in the opposite side of driving. The durability is enhanced by reducing the exposed portion of the regulator.
    Type: Application
    Filed: March 15, 2017
    Publication date: June 28, 2018
    Inventors: Seong Jong PARK, Sang Do NA, Hyoung Seok KIM, In Chul SUNG