Patents by Inventor Andew J. Kleitsch

Andew J. Kleitsch 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).

  • Control valve with variable pressure relief
    Patent number: 9181964
    Abstract: A hydraulic system and method of controlling hydraulic pressure are disclosed. The hydraulic system includes a pump fluidly coupled to a reservoir that contains hydraulic fluid, a control valve fluidly coupled to the pump, the control valve being selectively movable between at least two positions, a relief valve fluidly coupled to the pump via a relief conduit, the relief valve operable to flow hydraulic fluid from an outlet of the pump to the reservoir, and a variable pressure setpoint module fluidly coupled to the relief valve and the control valve. The variable pressure setpoint module being operable to open the relief valve in response to at least two pressure setpoints depending on a position of the control valve.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: November 10, 2015
    Assignee: Caterpillar Inc.
    Inventor: Andew J. Kleitsch
  • Control Valve with Variable Pressure Relief
    Publication number: 20140305112
    Abstract: A hydraulic system and method of controlling hydraulic pressure are disclosed. The hydraulic system includes a pump fluidly coupled to a reservoir that contains hydraulic fluid, a control valve fluidly coupled to the pump, the control valve being selectively movable between at least two positions, a relief valve fluidly coupled to the pump via a relief conduit, the relief valve operable to flow hydraulic fluid from an outlet of the pump to the reservoir, and a variable pressure setpoint module fluidly coupled to the relief valve and the control valve. The variable pressure setpoint module being operable to open the relief valve in response to at least two pressure setpoints depending on a position of the control valve.
    Type: Application
    Filed: April 16, 2013
    Publication date: October 16, 2014
    Applicant: Caterpillar Inc.
    Inventor: Andew J. Kleitsch