Patents by Inventor Yuan-Ching Chi

Yuan-Ching Chi 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: 20030041698
    Abstract: An engaging member of a ratchet tool includes a polygonal section for being connected to a socket. A receiving section extends from said polygonal section and a carry member is movably received in said receiving section. A spring is engaged between said carry member and an inside of said receiving section. A first end of said carry member extends from an opening of said receiving section and a magnet is connected to said first end of said carry member. The position of the magnet is automatically adjusted to reach the bolt by the spring.
    Type: Application
    Filed: August 31, 2001
    Publication date: March 6, 2003
    Inventor: Yuan-Ching Chi
  • Patent number: 6357323
    Abstract: A wrench includes a handle having a ring-shaped head in which a toothed member is rotatably received. Three protrusions extend radially inward from an inner periphery of the ring-shaped head so as to define three recesses between the protrusions. Two grooves are respectively defined in a top and a bottom of each of the protrusions so as to two elastic members therein. A top cap and a lower cap are respectively mounted to the ring-shaped head. The lower cap has three curved slots defined in a top surface thereof. Three pawl members engaged with the toothed member are movably located in the recesses and each have a pin movably received in the curved slots of the lower cap. The elastic members bias a rear surface of each of the pawl members.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: March 19, 2002
    Inventors: Yuan-Ching Chi, Shyong-Chuan Chen
  • Publication number: 20010003933
    Abstract: A wrench includes a handle having a ring-shaped head in which a toothed member is rotatably received. Three protrusions extend radially inward from an inner periphery of the ring-shaped head so as to define three recesses between the protrusions. Two grooves are respectively defined in a top and a bottom of each of the protrusions so as to two elastic members therein. A top cap and a lower cap are respectively mounted to the ring-shaped head. The lower cap has three curved slots defined in a top surface thereof. Three pawl members engaged with the toothed member are movably located in the recesses and each have a pin movably received in the curved slots of the lower cap. The elastic members bias a rear surface of each of the pawl members.
    Type: Application
    Filed: February 5, 2001
    Publication date: June 21, 2001
    Inventors: Yuan-Ching Chi, Shyong-Chuan Chen