Patents by Inventor Sang-Cheol Yoo

Sang-Cheol Yoo 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).

  • Publication number: 20040178588
    Abstract: Disclosed is a roller blade shoe that has a shoe body having a cavity in an outsole thereof. A housing is accommodated in the cavity of the shoe body and an underside of the housing is opened. A plurality of roller assemblies are collapsibly installed lengthwise of the housing in an in-line pattern. Each roller assembly includes a lever fork having an upper end pivotably supported on a sidewall of the housing and a roller installed at a lower end of the lever fork. A manipulating handle is pivotably installed at the shoe body and rotated in a forward or backward direction to accommodate/withdraw the roller assemblies into/from the housing. A roller driving wire includes a withdrawing wire and an accommodating wire that are arranged in parallel to each other and both ends of which are connected to the roller assembly. A roller locking device cooperates with the roller driving wire. A brake is mounted on a rear end of the outsole of the shoe body.
    Type: Application
    Filed: March 14, 2003
    Publication date: September 16, 2004
    Inventor: Sang-Cheol Yoo
  • Publication number: 20040140635
    Abstract: Disclosed is a shoe with roller blade assembly. The shoe has a shoe body which has a cavity in an outsole thereof A housing is accommodated in the cavity of the shoe body. An underside of the housing is opened and assembling slots are horizontally formed in lower inner ends of both sidewalls of the housing. A roller assembly is movably accommodated in the housing. The roller assembly includes a frame and a plurality of rollers arranged in a lower end of the frame in an in-line pattern. A stopper is provided for restricting the roller assembly from being completely withdrawn from the housing. A locker is movably coupled to the assembling slots of the housing such that a part of the locker protrudes through a rear portion of the outsole of the shoe. The locker selectively makes contact with an upper end or a lower end of the roller assembly so as to support the roller assembly. A brake is mounted on a rear end of the outsole of the shoe.
    Type: Application
    Filed: January 21, 2003
    Publication date: July 22, 2004
    Inventor: Sang-Cheol Yoo
  • Publication number: 20030227153
    Abstract: There is provided a shoe with a roller device suitable for use in walking as an ordinary shoe and for use in skating as an in-line roller skate, and comprising a body including a body part to receive the foot of a user and an sole integrally formed with the bottom of the body part and having a receiving groove in the vertical direction, a roller device including a housing placed inside the sole, a stopper provided in the housing to movably reciprocate back and forth, a first wheel assembly movably fixed to the front of the housing and fixed to maintain the state for use in the ordinary shoe or for use in the in-line skate by the stopper, and a second wheel assembly provided on the back of the housing, movably fixed in the direction confronting with the moving direction of the first wheel assembly, and fixed to maintain the state for use in the ordinary shoe or for use in the in-line skate by the stopper, and a switch provided on the side of the sole of the body with engaged with the stopper to control the mov
    Type: Application
    Filed: November 12, 2002
    Publication date: December 11, 2003
    Inventor: Sang-Cheol Yoo