Patents by Inventor Teh-Tien Chen

Teh-Tien Chen 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).

  • Damper for a pivot door
    Patent number: 6442795
    Abstract: A damper for a pivot door has a piston movably received inside the damper and having a first channel and a second channel respectively and selectively communicating with a space full of hydraulic oil, such that the movement of the piston is able to be slowed by the interchange of the communication of the first channel and the space and the second channel and the space. Thus, the movement of the pivot door is slowed.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: September 3, 2002
    Assignee: Girefa Enterprise Co., Ltd.
    Inventor: Teh-Tien Chen
  • Damper for a pivot door
    Publication number: 20020092126
    Abstract: A damper for a pivot door has a piston movably received inside the damper and having a first channel and a second channel respectively and selectively communicating with a space full of hydraulic oil, such that the movement of the piston is able to be slowed by the interchange of the communication of the first channel and the space and the second channel and the space. Thus, the movement of the pivot door is slowed.
    Type: Application
    Filed: January 16, 2001
    Publication date: July 18, 2002
    Inventor: Teh-Tien Chen