Patents by Inventor Yun Chang Chun

Yun Chang Chun 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 decoupling groove for truck/bus
    Patent number: 8322387
    Abstract: Disclosed is a truck/bus tire that has an improved decoupling groove capable of suppressing unbalanced wear of a shoulder rib and preventing side chipping of a tread, and that has enhanced durability of a belt. The tire has a decoupling groove formed between an outermost rib and a tread lateral side. An offset structure is provided by cutting off a portion around a start point where a virtual line extending from a distal end of the outermost rib of the tread intersects a virtual line extending from the tread lateral side. A side of the outermost rib is parallel to the tread lateral side and the cut-off portion is formed with a “<”-shaped groove. A sacrifice rib protruding from the “<”-shaped groove is formed coplanar with the start point located on the virtual line extending from the tread lateral side.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: December 4, 2012
    Assignee: Hankook Tire Co., Ltd.
    Inventors: Yun Chang Chun, Seung Jong Park
  • Manufacturing method for heavy-duty pneumatic tire and tire manufactured by the same
    Patent number: 8075718
    Abstract: Disclosed are a method for manufacturing a heavy-duty pneumatic tire by winding a reinforcing belt disposed in a belt layer of a tread with an untopped spiral steel cord, and a tire manufactured by the same.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: December 13, 2011
    Assignee: Hankook Tire Co., Ltd.
    Inventors: Yun Chang Chun, Seung Il Min
  • Manufacturing method for heavy-duty pneumatic tire and tire manufactured by the same
    Publication number: 20090133794
    Abstract: Disclosed are a method for manufacturing a heavy-duty pneumatic tire by winding a reinforcing belt disposed in a belt layer of a tread with an untopped spiral steel cord, and a tire manufactured by the same.
    Type: Application
    Filed: October 28, 2008
    Publication date: May 28, 2009
    Inventors: Yun Chang Chun, Seung II Min
  • Tire with decoupling groove for truck/bus
    Publication number: 20090133792
    Abstract: Disclosed is a truck/bus tire that has an improved decoupling groove capable of suppressing unbalanced wear of a shoulder rib and preventing side chipping of a tread, and that has enhanced durability of a belt. The tire has a decoupling groove formed between an outermost rib and a tread lateral side. An offset structure is provided by cutting off a portion around a start point where a virtual line extending from a distal end of the outermost rib of the tread intersects a virtual line extending from the tread lateral side. A side of the outermost rib is parallel to the tread lateral side and the cut-off portion is formed with a “<”-shaped groove. A sacrifice rib protruding from the “<”-shaped groove is formed coplanar with the start point located on the virtual line extending from the tread lateral side.
    Type: Application
    Filed: April 2, 2008
    Publication date: May 28, 2009
    Inventors: Yun Chang Chun, Seung Jong Park