Patents by Inventor D. Li Anatoli

D. Li Anatoli 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 system with secondary exhaust passage
    Patent number: 5950519
    Abstract: A hydraulic system for working cylinders of construction equipment is disclosed. The system allows oil to be smoothly drained from a chamber of a working cylinder into an oil tank through a first passage or/and a second passage without being resisted during an operation of the cylinder. The system thus effectively and smoothly moves the working cylinder while improving operational efficiency and operational speed of the cylinder. When the system is used with a boom cylinder of a power excavator, the system effectively performs a boom-up or boom-down action without losing pressure.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: September 14, 1999
    Assignee: Volvo Construction Equipment Korea Co., Ltd.
    Inventor: D. Li Anatoli