Patents by Inventor Kunming Liu

Kunming Liu 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).

  • Patent number: 10151184
    Abstract: A direct drive motor-based walking beam pumping unit includes a base; a support is arranged at the upper end of the base; a walking beam is arranged at the upper end of the support; a horsehead is arranged at a first of the walking beam; a lifting rope is arranged on the horsehead and a beam hanger is arranged on the lifting rope; a balance weight is arranged at a second end of the walking beam away from the horsehead; a barrel is arranged at the upper end of the base; a direct drive motor is arranged at the upper end of the barrel.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: December 11, 2018
    Inventor: Kunming Liu
  • Publication number: 20180010431
    Abstract: The invention discloses a direct drive motor-based walking beam pumping unit, comprising a base; a support is arranged at the upper end of the base; a walking beam is arranged at the upper end of the support; a horsehead is arranged at a first of the walking beam; a lifting rope is arranged on the horsehead and a beam hanger is arranged on the lifting rope; a balance weight is arranged at a second end of the walking beam away from the horsehead; a barrel is arranged at the upper end of the base; a direct drive motor is arranged at the upper end of the barrel. The invention cancels the combination of belt, belt pulley and reducer conventionally used in the pumping unit, greatly lowering the failure rate of the pumping unit, decreasing the frequency of maintenance and service, reducing the cost in use and improving the production efficiency.
    Type: Application
    Filed: August 24, 2016
    Publication date: January 11, 2018
    Inventor: Kunming Liu