Patents by Inventor Duck-Rae Cho

Duck-Rae Cho 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).

  • Patent number: 8616527
    Abstract: Disclosed is a hoist using a friction wheel to maximize horizontal movement of a load to be lifted while preventing a wire from deviating from a winding orbit while being wound on a wire drum, the friction wheel having a simplified configuration and being designed to stably support horizontal and vertical movable guide rollers. The hoist includes a single friction wheel on which a wire at a winding side is wound, a wire drum on which the wire at a drawing side is wound, a driven friction wheel through which the wire is guided from the friction wheel to the wire drum, vertical and horizontal stationary guide rollers and vertical and horizontal movable rollers for guidance of the wire, a movable roller mount to horizontally reciprocate the horizontal and vertical movable guide rollers, and upper and lower sheaves to guide the wire to the friction wheel.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: December 31, 2013
    Assignee: KG Inc.
    Inventor: Duck-Rae Cho
  • Patent number: 8453855
    Abstract: A turning device for a hoist is disclosed, in which a weight thing with a narrow width can be stably turned with a stable support. A rope end unit or an upper sheave unit is easily installed at a hoist frame. A rope end unit or an upper sheave unit is installed in a hoist frame and is freely movable in opposite positions.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: June 4, 2013
    Assignee: KG Inc.
    Inventor: Duck-Rae Cho
  • Publication number: 20120305869
    Abstract: Disclosed is a hoist using a friction wheel to maximize horizontal movement of a load to be lifted while preventing a wire from deviating from a winding orbit while being wound on a wire drum, the friction wheel having a simplified configuration and being designed to stably support horizontal and vertical movable guide rollers. The hoist includes a single friction wheel on which a wire at a winding side is wound, a wire drum on which the wire at a drawing side is wound, a driven friction wheel through which the wire is guided from the friction wheel to the wire drum, vertical and horizontal stationary guide rollers and vertical and horizontal movable rollers for guidance of the wire, a movable roller mount to horizontally reciprocate the horizontal and vertical movable guide rollers, and upper and lower sheaves to guide the wire to the friction wheel.
    Type: Application
    Filed: February 23, 2011
    Publication date: December 6, 2012
    Applicant: KG INC.
    Inventor: Duck-Rae Cho
  • Patent number: 7793794
    Abstract: A hoist for a low space crane is disclosed, which comprises a hoist frame in which a load point transferred to a girder is positioned at a vertical surface of one side of the girder, and a balance of a biased load is maintained for thereby decreasing an entire weight of the system, and an equal distribution unit which installed between the hoist frame and the guide rail for absorbing an impact load transferred to the hoist frame and equally distributing the entire vertical load. A buckling phenomenon does not occur at the girder even when a relatively heavy object is transferred by providing the first and second support wheel parts on the first vertical surface of the girder.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: September 14, 2010
    Assignee: KG Inc.
    Inventor: Duck-Rae Cho
  • Publication number: 20100096353
    Abstract: A turning device for a hoist is disclosed, in which a weight thing with a narrow width can be stably turned with a stable support. A rope end unit or an upper sheave unit is easily installed at a hoist frame. A rope end unit or an upper sheave unit is installed in a hoist frame and is freely movable in opposite positions.
    Type: Application
    Filed: January 24, 2008
    Publication date: April 22, 2010
    Applicant: KG INC.
    Inventor: Duck-Rae Cho
  • Publication number: 20090114613
    Abstract: A hoist for a low space crane is disclosed, which comprises a hoist frame in which a load point transferred to a girder is positioned at a vertical surface of one side of the girder, and a balance of a biased load is maintained for thereby decreasing an entire weight of the system, and an equal distribution unit which is installed between the hoist frame and the guide rail for absorbing an impact load transferred to the hoist frame and equally distributing the entire vertical load. A buckling phenomenon does not occur at the girder even when a relatively heavy object is transferred by providing the first and second support wheel parts on the first vertical surface of the girder.
    Type: Application
    Filed: May 25, 2007
    Publication date: May 7, 2009
    Applicant: KG INC.
    Inventor: Duck-Rae Cho