Patents by Inventor Andrew Nippert

Andrew Nippert 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 and method for accumulating hydraulic fluid
    Patent number: 6655136
    Abstract: A hydraulic system is provided. The hydraulic system includes a a hydraulic actuator, a source of pressurized fluid, and a directional control valve controlling fluid flow into and out of the hydraulic actuator. An accumulator is disposed between a fluid input line and a fluid output line for the directional control valve. A regeneration control valve is disposed between the accumulator and the output of the source of pressurized fluid. A storage control valve is disposed between the fluid output line and a tank of the hydraulic system.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: December 2, 2003
    Assignees: Caterpillar Inc, Shin Caterpillar Mitsubishi Ltd
    Inventors: Bradford J. Holt, John Krone, Andrew Nippert
  • System and method for accumulating hydraulic fluid
    Publication number: 20030115863
    Abstract: A hydraulic system is provided. The hydraulic system includes a a hydraulic actuator, a source of pressurized fluid, and a directional control valve controlling fluid flow into and out of the hydraulic actuator. An accumulator is disposed between a fluid input line and a fluid output line for the directional control valve. A regeneration control valve is disposed between the accumulator and the output of the source of pressurized fluid. A storage control valve is disposed between the fluid output line and a tank of the hydraulic system.
    Type: Application
    Filed: December 21, 2001
    Publication date: June 26, 2003
    Inventors: Bradford J. Holt, John Krone, Andrew Nippert