Patents by Inventor Steven Chi Fai Kwan

Steven Chi Fai Kwan 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: 6092847
    Abstract: A set of locking tongs comprising a first arm and a second arm each comprising a hinge end and a grasping end. Hinge members are provided for pivotably connecting the first and second arms together at the hinge ends, so that the arms can pivot between an open position and closed position. Spring members are included for biasing the arms in an open position. The locking member comprises a captured pin attached to the first arm and an aperture member attached to the second arm. The captured pin has a pin that moves under the effects of gravity within a contained range of motion, limited by a bracket. The second arm has an aperture located on a surface. When the tongs are held in an attitude such that gravity can act upon the pin, the pin will engage the aperture and prevent the tongs from opening. The outward force applied by the spring acts to retain the pin in its locked position through frictional forces thus resisting opening.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: July 25, 2000
    Assignee: Merry Chance Industries, Ltd.
    Inventor: Steven Chi Fai Kwan