Patents by Inventor Songqing Li

Songqing Li 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).

  • Power gear-shifting transmission and engineering machinery
    Patent number: 9447870
    Abstract: The present invention provides a power gear-shifting transmission and an engineering machinery. The power gear-shifting transmission comprises a clutch shaft assembly (1). The clutch shaft assembly (1) comprises a clutch shaft (11), a housing gear (12) arranged on the clutch shaft (11), a clutch disc (13) arranged within the housing gear (12), and a gear-shifting piston (14) arranged at one end of the clutch disc (13). The gear-shifting piston (14) is pushed by a clear hydraulic medium introduced via a fluid supply passage (3); the clean hydraulic medium is supplied by a hydraulic system (2). The engineering machinery comprises the power gear-shifting transmission.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: September 20, 2016
    Assignees: Hunan Sany Intelligent Control Equipment Co., Ltd., Sany Heavy Industry Co., Ltd.
    Inventors: Xiaogang Yi, Songqing Li, Qiang Chen
  • Power Gear-Shifting Transmission and Engineering Machinery
    Publication number: 20150027253
    Abstract: A power gear-shifting transmission and an engineering machinery are disclosed. The power gear-shifting transmission comprises a clutch shaft assembly (1). The clutch shaft assembly (1) comprises a clutch shaft (11), a housing gear (12) arranged on the clutch shaft (11), a clutch disc (13) arranged within the housing gear (12), and a gear-shifting piston (14) arranged at one end of the clutch disc (13). The gear-shifting piston (14) is pushed by a clear hydraulic medium introduced via a fluid supply passage (3); the clean hydraulic medium is supplied by a hydraulic system (2). The engineering machinery comprises the power gear-shifting transmission.
    Type: Application
    Filed: April 12, 2012
    Publication date: January 29, 2015
    Applicants: Hunan Sany Intelligent Control Equipment Co., Ltd., Sany Heavy Industry Co., Ltd.
    Inventors: Xiaogang Yi, Songqing Li, Qiang Chen