Patents by Inventor Li Nannan

Li Nannan 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).

  • Hydraulic actuating device for a sliding stem control valve assembly
    Patent number: 8714515
    Abstract: A hydraulic actuating device for a sliding stem control valve assembly is mounted between a control valve and an actuator housing. The hydraulic actuating device is connected to one of a control valve stem, an actuator stem, and a stem connector and the hydraulic actuating device moves either the control valve stem, the actuator stem, or the stem connector in response to varying hydraulic pressure within the hydraulic actuating device. The hydraulic actuating device may be used to override an actuator of the sliding stem valve during emergency operations, or to provide a backup actuator in the case of a primary actuator malfunction.
    Type: Grant
    Filed: December 28, 2009
    Date of Patent: May 6, 2014
    Assignee: Emerson Process Management (Tianjin) Valces Co., Ltd
    Inventors: Li Nannan, Gao Chun
  • HYDRAULIC ACTUATING DEVICE FOR A SLIDING STEM CONTROL VALVE ASSEMBLY
    Publication number: 20110155250
    Abstract: A hydraulic actuating device for a sliding stem control valve assembly is mounted between a control valve and an actuator housing. The hydraulic actuating device is connected to one of a control valve stem, an actuator stem, and a stem connector and the hydraulic actuating device moves either the control valve stem, the actuator stem, or the stem connector in response to varying hydraulic pressure within the hydraulic actuating device. The hydraulic actuating device may be used to override an actuator of the sliding stem valve during emergency operations, or to provide a backup actuator in the case of a primary actuator malfunction.
    Type: Application
    Filed: December 28, 2009
    Publication date: June 30, 2011
    Applicant: EMERSON PROCESS MANAGEMENT (TIANJIN) VALVES CO., LTD
    Inventors: Li Nannan, Gao Chun