Patents by Inventor David J. Obringer

David J. Obringer 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).

  • Warm up cycle for a materials handling vehicle
    Patent number: 9309902
    Abstract: A method for operating a materials handling vehicle includes activating the materials handling vehicle and performing a warm up cycle. During the warm up cycle, energy is provided to at least one valve within the materials handling vehicle so as to energize the valve without providing a working fluid to the valve. Providing energy to the at least one valve effects a heating of oil located within the at least one valve.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: April 12, 2016
    Assignee: Crown Equipment Corporation
    Inventors: Karl L. Dammeyer, Nicholas D. Thobe, David J. Obringer, Cole T. Steinbrunner, Marc A. McClain, Darrin R. Ihle
  • WARM UP CYCLE FOR A MATERIALS HANDLING VEHICLE
    Publication number: 20130183127
    Abstract: A method for operating a materials handling vehicle includes activating the materials handling vehicle and performing a warm up cycle. During the warm up cycle, energy is provided to at least one valve within the materials handling vehicle so as to energize the valve without providing a working fluid to the valve. Providing energy to the at least one valve effects a heating of oil located within the at least one valve.
    Type: Application
    Filed: January 4, 2013
    Publication date: July 18, 2013
    Inventors: Karl L. Dammeyer, Nicholas D. Thobe, David J. Obringer, Cole T. Steinbrunner, Marc A. McClain, Darrin R. Ihle
  • Slip control for a materials handling vehicle
    Patent number: 8131422
    Abstract: A vehicle is provided comprising: a main body; a plurality of wheels coupled to the main body; a traction motor associated with the main body and coupled to at least one of the wheels for driving the one wheel; control apparatus coupled to the traction motor and generating a motor drive signal to the traction motor; and a first sensor for generating a speed signal indicative of a speed of the driven wheel. The control apparatus may calculate acceleration of the one wheel using changes in the speed signal over time and calculate an acceleration of the vehicle using torque applied by the traction motor and a mass of the vehicle.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: March 6, 2012
    Assignee: Crown Equipment Corporation
    Inventors: Eric L. Jensen, David J. Obringer, Nicholas J. Sherman
  • SLIP CONTROL FOR A MATERIALS HANDLING VEHICLE
    Publication number: 20090276109
    Abstract: A vehicle is provided comprising: a main body; a plurality of wheels coupled to the main body; a traction motor associated with the main body and coupled to at least one of the wheels for driving the one wheel; control apparatus coupled to the traction motor and generating a motor drive signal to the traction motor; and a first sensor for generating a speed signal indicative of a speed of the driven wheel. The control apparatus may calculate acceleration of the one wheel using changes in the speed signal over time and calculate an acceleration of the vehicle using torque applied by the traction motor and a mass of the vehicle.
    Type: Application
    Filed: April 29, 2009
    Publication date: November 5, 2009
    Applicant: CROWN EQUIPMENT CORPORATION
    Inventors: Eric L. Jensen, David J. Obringer, Nicholas J. Sherman