Patents by Inventor Wen C. Chung

Wen C. Chung 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).

  • Hidden safety contoured leaf spring locking device
    Patent number: 5357994
    Abstract: The invention herein relates to a kind of hidden safety contoured leaf spring positioner device for umbrella structures that is comprised of a center pole, a sliding strut spreader, a handle connector, contoured leaf spring and other components, wherein the tensility of the contoured leaf spring is utilized to produce a special locking function and is installed in a round positioning hole of the positioning cavity inside the sliding strut spreader, thereby enabling an umbrella to be actively and safely locked when opened or closed.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: October 25, 1994
    Inventor: Wen C. Chung