Patents by Inventor Shihan Zhang

Shihan 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).

  • Acceleration sensor calibrated hoist positioning
    Patent number: 7958970
    Abstract: A hoist positioning system includes an accelerometer attached to a hoist, a control unit for processing signals from the accelerometer and comparing the processed signals with reference data to determine a position of the hoist, a drive system for moving the hoist up and down, and a relay that is switched ON and OFF by a control signal from the control unit. When the relay is switched ON, power is supplied to the drive system from a high-voltage power source and the hoist is driven up or down. When the relay is switched OFF, power from the high-voltage power source to the drive system is cut off and the hoist stops moving up or down.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: June 14, 2011
    Assignee: Empire Technology Development LLC
    Inventors: Pengfei Ma, Shihan Zhang
  • HOIST POSITIONING SYSTEM AND METHOD
    Publication number: 20110048861
    Abstract: A hoist positioning system includes an accelerometer attached to a hoist, a control unit for processing signals from the accelerometer and comparing the processed signals with reference data to determine a position of the hoist, a drive system for moving the hoist up and down, and a relay that is switched ON and OFF by a control signal from the control unit. When the relay is switched ON, power is supplied to the drive system from a high-voltage power source and the hoist is driven up or down. When the relay is switched OFF, power from the high-voltage power source to the drive system is cut off and the hoist stops moving up or down.
    Type: Application
    Filed: September 2, 2009
    Publication date: March 3, 2011
    Applicant: Rong Zhi Xin Science and Technology Development (Beijing) Co., Ltd.
    Inventors: PENGFEI MA, SHIHAN ZHANG