Patents by Inventor Leaf Li

Leaf 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).

  • System for lubricating a crankshaft
    Patent number: 12359690
    Abstract: A system for lubricating a crankshaft of an engine includes a first main journal including a first shaft and in fluid communication with an oil supply. The system also includes a first main journal oil passage in fluid communication with the oil supply extending through the first shaft. The system also includes a first pin journal including a first crank, and a first oil passage extending partially through the first crank in fluid communication with the first main journal oil passage. The system also includes a second pin journal including a second crank, and a second oil passage extending partially through the second crank in fluid communication with the first main journal oil passage. Each of the first oil passage extends at a first non-zero angle and the second oil passage extends at a second non-zero angle relative to the first main journal oil passage.
    Type: Grant
    Filed: September 15, 2023
    Date of Patent: July 15, 2025
    Assignee: Cummins Inc.
    Inventors: Qing Zhang, Leaf Li, Xin Jia
  • SYSTEM FOR LUBRICATING A CRANKSHAFT
    Publication number: 20250092909
    Abstract: A system for lubricating a crankshaft of an engine includes a first main journal including a first shaft and in fluid communication with an oil supply. The system also includes a first main journal oil passage in fluid communication with the oil supply extending through the first shaft. The system also includes a first pin journal including a first crank, and a first oil passage extending partially through the first crank in fluid communication with the first main journal oil passage. The system also includes a second pin journal including a second crank, and a second oil passage extending partially through the second crank in fluid communication with the first main journal oil passage. Each of the first oil passage extends at a first non-zero angle and the second oil passage extends at a second non-zero angle relative to the first main journal oil passage.
    Type: Application
    Filed: September 15, 2023
    Publication date: March 20, 2025
    Applicant: CUMMINS INC.
    Inventors: Qing Zhang, Leaf Li, Xin Jia