Patents by Inventor Yigang Yu

Yigang Yu 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).

  • Publication number: 20180230963
    Abstract: The present invention relates to a device which applies work to the outside with environmental thermal energy, including a positive feedback heat pump system and a reciprocating multi-stage heat exchange working system. A high temperature heat source and a low temperature heat source are produced using a positive feedback heat pump, and at the same time the reciprocating multistage heat exchange working device applies work with heat energy and cold energy. As we can get several times of heat energy and cold energy when a certain amount of electric energy is consumed by a heat pump, and the thermal efficiency of the reciprocating multistage heat exchange working system is 100% theoretically, so we can get several times of electric energy. That is to say, its output is much bigger than its input, and the device can run without electric energy input, and provide electric energy to the outside.
    Type: Application
    Filed: August 11, 2017
    Publication date: August 16, 2018
    Inventor: Yigang Yu
  • Patent number: 7678053
    Abstract: The present invention aims to provide a delay device having an analog delay line adaptable to a plurality of frequencies with a less number of taps. The analog delay line has a maximum delay amount equivalent to a wavelength from over a ? wavelength of a predetermined maximum wavelength of an input signal to under a 1 wavelength thereof. Tap intervals up to a delay point equivalent to ½ of a predetermined minimum wavelength of the input signal are different from tap intervals placed ahead of those. The maximum wavelength is a wavelength of a signal having a frequency of 2 MHz, for example, and the minimum wavelength is a wavelength of a signal having a frequency of 5 MHz, for example.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: March 16, 2010
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Yigang Yu, Shinichi Amemiya
  • Publication number: 20070038107
    Abstract: The present invention aims to provide a delay device having an analog delay line adaptable to a plurality of frequencies with a less number of taps. The analog delay line has a maximum delay amount equivalent to a wavelength from over a ? wavelength of a predetermined maximum wavelength of an input signal to under a 1 wavelength thereof. Tap intervals up to a delay point equivalent to ½ of a predetermined minimum wavelength of the input signal are different from tap intervals placed ahead of those. The maximum wavelength is a wavelength of a signal having a frequency of 2 MHz, for example, and the minimum wavelength is a wavelength of a signal having a frequency of 5 MHz, for example.
    Type: Application
    Filed: June 22, 2006
    Publication date: February 15, 2007
    Inventors: Yigang Yu, Shinichi Amemiya