Patents by Inventor Teng-Tsung Tsai

Teng-Tsung Tsai 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).

  • Bidirectionally pumping air pump
    Patent number: 5489197
    Abstract: An improved pump structure including a shaft tube, a pivot tube, a piston element, a push and pull element and a handle element. The shaft tube is inserted inside the tube. The pivot tube's two ends are respectively connected to the handle element and the piston element. The piston element is disposed in the air chamber of the push and pull element. By an ingenious arrangement of holes, tubes and unidirectional valves, the reciprocating travels of the push and pull element permit simultaneous pumping and air intake, increasing the pumping efficiency.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: February 6, 1996
    Inventor: Teng-Tsung Tsai