Patents by Inventor Chang-Ming Zhu

Chang-Ming Zhu 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).

  • Buffer device for elevator
    Patent number: 7287626
    Abstract: In a buffer device for an elevator, a hydraulic buffer that alleviates shock generated when a traveling body impacts at the bottom of a hoistway is located at the bottom of the hostway. Provided between the traveling body and the bottom of the hoistway is an elastic member that is elastically deformed and that alleviates the shock generated by the impact of the traveling body with the hydraulic buffer. The elastic member is arranged so that, when elastically deformed, almost fall of the elastic member is positioned within a range of a vertical dimension of the hydraulic buffer.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: October 30, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Kigawa, Takashi Yumura, Sen Zhao, Chang-Ming Zhu
  • Buffer device for elevator
    Publication number: 20060249334
    Abstract: In a buffer device for an elevator, a hydraulic buffer that alleviates shock generated when a traveling body impacts at the bottom of a hoistway is located at the bottom of the hoistway. Provided between the traveling body and the bottom of the hoistway is an elastic member that is elastically deformed and that alleviates the shock generated by the impact of the traveling body with the hydraulic buffer. The elastic member is arranged so that, when elastically deformed, almost all of the elastic member is positioned within a range of a vertical dimension of the hydraulic buffer.
    Type: Application
    Filed: June 30, 2006
    Publication date: November 9, 2006
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Kigawa, Takashi Yumura, Sen Zhao, Chang-Ming Zhu
  • Buffer device for elevator
    Publication number: 20060231349
    Abstract: In a buffer device for an elevator, a hydraulic buffer that alleviates shock generated when a traveling body impacts at the bottom of a hoistway is located at the bottom of the hostway. Provided between the traveling body and the bottom of the hoistway is an elastic member that is elastically deformed and that alleviates the shock generated by the impact of the traveling body with the hydraulic buffer. The elastic member is arranged so that, when elastically deformed, almost fall of the elastic member is positioned within a range of a vertical dimension of the hydraulic buffer.
    Type: Application
    Filed: June 13, 2006
    Publication date: October 19, 2006
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Kigawa, Takashi Yumura, Sen Zhao, Chang-Ming Zhu
  • Buffer device for elevator
    Publication number: 20030217895
    Abstract: In the buffer device for an elevator of the present invention, a hydraulic buffer that alleviates shock generated when a traveling body impacts a bottom of a hoistway is arranged at the bottom of the hoistway. Provided between the traveling body and the bottom of the hoistway is an elastic member that is elastically deformed and that alleviates the shock generated by the impact of the traveling body with the hydraulic buffer. The elastic member is arranged so that when elastically deformed, almost the whole thereof is positioned within a range of a vertical dimension of the hydraulic buffer.
    Type: Application
    Filed: May 20, 2003
    Publication date: November 27, 2003
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Kigawa, Takashi Yumura, Sen Zhao, Chang-Ming Zhu