Patents by Inventor Gendang Zhang

Gendang 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: 9475164
    Abstract: A hand-held power tool is equipped with a dust extraction device which includes a dust box for holding dust. A closing flap is arranged in a tube section which lies in the flow path to the dust box, and this closing flap can be adjusted between the closed position and the open position. The closing flap is pivotably held in the region of the inner wall of the tube section and can be opened in the direction of the dust box. In the closed position, the closing flap bears against a stop which protrudes into the tube section, extends at an angle with respect to the direction of flow through the tube connection piece, and forms a stop line or stop area against which the closing flap correspondingly bears.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: October 25, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Robert Simm, Weihong Li, Qun Zhou, Yi Lv, Gendang Zhang, Achim Duesselberg, Xuejing Chen
  • Publication number: 20130319711
    Abstract: A hand-held power tool is equipped with a dust extraction device which includes a dust box for holding dust. A closing flap is arranged in a tube section which lies in the flow path to the dust box, and this closing flap can be adjusted between the closed position and the open position. The closing flap is pivotably held in the region of the inner wall of the tube section and can be opened in the direction of the dust box. In the closed position, the closing flap bears against a stop which protrudes into the tube section, extends at an angle with respect to the direction of flow through the tube connection piece, and forms a stop line or stop area against which the closing flap correspondingly bears.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 5, 2013
    Inventors: Robert Simm, Weihong Li, Qun Zhou, Yi Lv, Wei Liu, Gendang Zhang, Achim Duesselberg, Xuejing Chen