Patents by Inventor Lichun MA

Lichun MA 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).

  • DAMPING SYSTEM FOR MOVABLE ARM OF LOADING MACHINE AND OPERATION MACHINERY
    Publication number: 20230235536
    Abstract: Disclosed are a damping system for a movable arm of a loading machine and an operation machinery, which comprise a multi-way valve, a movable arm oil cylinder, a movable arm damping valve, and a damping lock. The multi-way valve comprises a movable arm valve core and a bucket valve core, a first movable arm oil port of the movable arm valve core communicates with a rod cavity of the movable arm oil cylinder, a second movable arm oil port of the movable arm valve core communicates with a rodless cavity of the movable arm oil cylinder, the rod cavity of the movable arm oil cylinder communicates with the movable arm damping valve, the rodless cavity of the movable arm oil cylinder communicates, via the damping lock, with the movable arm damping valve; a switching oil port of the damping lock communicates with an unloading position of the bucket valve core.
    Type: Application
    Filed: March 30, 2023
    Publication date: July 27, 2023
    Applicant: Shanghai Sany Heavy Machinery Co., Ltd.
    Inventors: Lichun MA, Zida LIU, Weian JIANG