Patents by Inventor Changqu Ru

Changqu Ru 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).

  • Vehicle tire warning system
    Patent number: 7817024
    Abstract: An air pressure sensor (2) for a vehicle tire warning system includes a tubular housing (21) defining a chamber (218), an air pressure actuating device seated in the chamber and being moveable back and forth in the chamber in response to air pressure change in the vehicle tire, and a switch device to electrically connect a high air pressure warning circuit or a low air pressure warning circuit under the drive of the air pressure actuating device. The chamber of the tubular housing is communicated to the atmosphere via a connecting pipe (29).
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: October 19, 2010
    Inventor: Changqu Ru
  • Vehicle Tire Warning System
    Publication number: 20080266074
    Abstract: An air pressure sensor (2) for a vehicle tire warning system includes a tubular housing (21) defining a chamber (218), an air pressure actuating device seated in the chamber and being moveable back and forth in the chamber in response to air pressure change in the vehicle tire, and a switch device to electrically connect a high air pressure warning circuit or a low air pressure warning circuit under the drive of the air pressure actuating device. The chamber of the tubular housing is communicated to the atmosphere via a connecting pipe (29).
    Type: Application
    Filed: December 3, 2007
    Publication date: October 30, 2008
    Inventor: Changqu Ru