Patents by Inventor Ya-Wen Hsin

Ya-Wen Hsin 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: 6152477
    Abstract: The present invention relates to a locking device for a foldable stroller, which is applied in a foldable stroller which is constructed of a plurality of frames capable of folding and unfolding, especially in control means which is two-stage in the operation process of folding and unfolding. The present invention utilizes a sliding element to control two frames of a stroller in both folded and unfolded positions. In its first position, the frames is stationary and fixed. Once the sliding element is pulled at first stage, one frame escapes therefrom and stops until reaching a stop tip. In the second stage, the frames is still stopped by ring-pull thereof after the sliding element is pulled again, and the frames are finally unfolded until the sliding element is continuing pulling again.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: November 28, 2000
    Assignee: Link Treasure Limited
    Inventors: Ya-Wen Hsin, Cheng-Fan Yang