Patents by Inventor Gu Qinghai

Gu Qinghai 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).

  • Water heater
    Patent number: 8161918
    Abstract: A storage-type water heater includes a tank enclosing a volume of water, the tank having an upper portion and a lower portion, a chamber adjacent the lower portion of the tank and adapted to at least partially enclose a source of a heated fluid, and a helical tube heat exchanger at least partially enclosed within the tank and fluidly connected to the chamber. The helical tube directs the heated fluid from the lower portion to the upper portion of the tank and promotes heat exchange between the water in the tank and the heated fluid flowing therethrough.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: April 24, 2012
    Assignee: Aos Holding Company
    Inventors: Hongfei Ma, Zhihua Zhang, Lei Cao, Hyungsik Lee, Gu Qinghai
  • WATER HEATER
    Publication number: 20100043728
    Abstract: A storage-type water heater includes a tank enclosing a volume of water, the tank having an upper portion and a lower portion, a chamber adjacent the lower portion of the tank and adapted to at least partially enclose a source of a heated fluid, and a helical tube heat exchanger at least partially enclosed within the tank and fluidly connected to the chamber. The helical tube directs the heated fluid from the lower portion to the upper portion of the tank and promotes heat exchange between the water in the tank and the heated fluid flowing therethrough.
    Type: Application
    Filed: August 25, 2008
    Publication date: February 25, 2010
    Inventors: Hongfei Ma, Zhihua Zhang, Lei Cao, Hyungsik Lee, Gu Qinghai