Patents by Inventor Yen-Nien Chang

Yen-Nien Chang 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: 8480096
    Abstract: A structure of inline skates is provided, the structure of inline skates includes a cushion device, a wheel with an annular ratchet wheel on its side, and a pawl assembly. By using the user's weight to press down the structure of present invention, the wheel with the annular ratchet wheel on its side engages the pawl assembly, which stops the wheel with the annular ratchet wheel on its side from rolling in one direction, and the wheel with the annular ratchet wheel on its side can roll in another direction. Thereby, the structure of inline skates is more ergonomic and exercise injuries can be prevented. In addition, a brake is provided for providing shock absorption and as a fulcrum to make more powerful acceleration. Besides, automatic support upright is also provided for avoiding tumbles.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: July 9, 2013
    Inventor: Yen-Nien Chang
  • Publication number: 20100320707
    Abstract: The present invention relates generally to a structure of inline skates, which provides a cushion device, a wheel with an annular ratchet wheel on its side, and a pawl assembly. By pressing down the weight, the wheel with the annular ratchet wheel on its side engages the pawl assembly, which stops the wheel with the annular ratchet wheel on its side from rolling in one direction, and the wheel with the annular ratchet wheel on its side can roll in another direction. Thereby, the structure of inline skates is more ergonomic and exercise injuries can be prevented. In addition, a brake is provided for providing shock absorption and more powerful acceleration. Besides, automatic support upright is also provided for avoiding tumbles.
    Type: Application
    Filed: July 27, 2010
    Publication date: December 23, 2010
    Inventor: Yen-Nien CHANG
  • Publication number: 20080029979
    Abstract: The present invention relates generally to an improved structure of inline skates, which provides a cushion, a wheel with a gearwheel on its side, and a pawl assembly. By pressing down the weight, the wheel with gearwheel on its side occludes the pawl assembly, which stops the wheel with gearwheel on its side from rolling one-wayly. Thereby, the improved structure of inline skates is more ergonomic and exercise injuries can be prevented. In addition, a brake is provided for providing shock absorption and more powerful acceleration. Besides, automatic support upright is also provided for avoiding tumbles.
    Type: Application
    Filed: June 11, 2007
    Publication date: February 7, 2008
    Inventor: YEN-NIEN CHANG
  • Patent number: 4770297
    Abstract: An assembling tool holder set includes a plurality of tool holder units having differently sized holes formed thereon for inserting differently sized tools and having different heights with respect to the different holes, each tool holder unit formed with extensions and grooves on its side faces so that each holder unit can be engageably combined with any adjacent tool holder units for optionally or selectively assembling several tool units as popularly used for their convenient handling and unconfused uses.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: September 13, 1988
    Inventor: Yen-Nien Chang
  • Patent number: 4769923
    Abstract: A dryer includes: a housing, an eddy-flow turbo fan having an inner cylinder formed with plural blades each having an inclined groove protruding upwardly outwardly and backwardly relative to the rotating direction of the fan to be tangential to the inner periphery of the inner cylinder and an outer cylinder formed with plural blades each protruding upwardly inwardly and backwardly to be tangential to the outer periphery of the outer cylinder, a heater disposed around the fan, a wet feed means fluidically communicated to a lower hopper of the fan, and a dry discharge means fluidically communicated with an upper annular port of the fan, whereby upon the rotation of the fan, a hot air stream as heated by the heater will be guided inwardly upwardly by the outer cylinder and the other hot air stream will be guided outwardly upwardly by the inner cylinder to thereby form an eddy air flow to dry the wet product as spirally floated on the eddy air stream in an efficient and economic way.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: September 13, 1988
    Inventor: Yen-Nien Chang