Patents by Inventor Chung-Shan Sheen

Chung-Shan Sheen 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: 5251792
    Abstract: A spray bottle comprises a resilient transparent bottle having a removable top, a spray tube with an enlarged chamber on a lower end and a nozzle on an upper end, and a check valve on the bottom of the chamber. The chamber is slidingly disposed in a slide cavity within the top member with the spray tube extending through an aperture on an upper side thereof. The chamber is filled with a desired volume of liquid by immersing it to a selected depth in a fluid residing in a lower portion of the bottle, wherein the check valve is opened upon a downward displacement of the chamber. The spray tube is then raised to space the chamber from the surface of the liquid with the check valve acting to retain the quantity of fluid therein. A directional sealing ring disposed around an upper portion of the chamber allows the entry of air into the bottle during the upward displacement. The fluid in the chamber is subsequently discharged through the nozzle by squeezing the bottle.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: October 12, 1993
    Inventor: Chung-Shan Sheen