Patents by Inventor Enzo Cheng

Enzo Cheng 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).

  • Expanding tool for hollow members
    Patent number: 7325436
    Abstract: An expanding tool includes a housing having a passage, an expanding device attached to the housing and having a number of expanding segments for engaging with and for expanding a pipe, an expanding mandrel is slidably engaged in the housing and includes a conically tapering end engageable into a conical bore of the expanding segments for moving the expanding segments to expand the pipe, an actuating lever includes an upper portion engageable into a groove of the expanding mandrel and pivotally attached to the housing with a shaft, the actuating lever includes two cam members for moving the expanding mandrel to expand the pipe, and for retracting the expanding mandrel from the housing.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: February 5, 2008
    Inventor: Enzo Cheng
  • EXPANDING TOOL FOR HOLLOW MEMBERS
    Publication number: 20070277581
    Abstract: An expanding tool includes a housing having a passage, an expanding device attached to the housing and having a number of expanding segments for engaging with and for expanding a pipe, an expanding mandrel is slidably engaged in the housing and includes a conically tapering end engageable into a conical bore of the expanding segments for moving the expanding segments to expand the pipe, an actuating lever includes an upper portion engageable into a groove of the expanding mandrel and pivotally attached to the housing with a shaft, the actuating lever includes two cam members for moving the expanding mandrel to expand the pipe, and for retracting the expanding mandrel from the housing.
    Type: Application
    Filed: May 31, 2006
    Publication date: December 6, 2007
    Inventor: Enzo Cheng