Patents by Inventor Ki Chow

Ki Chow 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: 20070032164
    Abstract: A high performance yo-yo for performing tricks has a manual-return capability, an auto-return capability, and an on/off switch built into the yo-yo for turning auto-return capability on or off. The yo-yo further includes yo-yo halves, an axle, a spool surrounding the axle between the yo-yo halves for attachment of a string, and a spring-loaded centrifugal clutch. The clutch grips and releases the spool such that when the yo-yo is thrown and its rotational rate exceeds a pre-determined rate, the clutch releases to allow the yo-yo to spin about the spool at the end of the string, and when the yo-yo rotational rate slows to less than the pre-determined rate, the clutch grips to initiate auto-return. The clutch includes four radially arrayed clutch arms, each having a weighted free end. The clutch further includes two tension springs, each spring providing spring-load to two adjacent clutch arms. The four clutch arms are linked in pairs by expansion joints at the free ends of the arms.
    Type: Application
    Filed: August 2, 2005
    Publication date: February 8, 2007
    Inventor: Ki Chow