Patents by Inventor Yun Bing Zhang

Yun Bing Zhang 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: 7350265
    Abstract: A self-contained handheld drain clearing device is provided that uses compressed air to unblock various household drains and pipes. The device comprises an upper body and a lower body. The upper body includes a cylindrical chamber for housing a manual pump. A one-way inlet valve allows compressed air to enter a collection chamber, from which it exits to a storage chamber through a small hole in a piston. A trigger component is located in the upper body of the device, as is a pressure release safety component included for user protection. The lower body of the device primarily serves as a storage area for compressed air, containing an upper end and a lower end. The upper end contains threads for joining the lower body with the upper body, while the lower end contains a fitting for receiving various drain-sealing adapters.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: April 1, 2008
    Inventor: Yun Bing Zhang