Patents by Inventor Stephen Eric Post

Stephen Eric Post 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).

  • Hybrid energy management system
    Patent number: 8297392
    Abstract: A hybrid energy management system that estimates the net regenerative energy that can be collected during the breaking action of the swing mechanism, then, since this is the net energy that can be used to recharge an energy storage device without using the engine to help recharge the energy storage device, the system limits the use of the energy storage device to that net amount predicted to be available from the recovery period. The net regenerative energy is calculated by considering motor and inverter efficiencies for transferring energy to the battery and changes in the boom/stick/bucket inertia moment.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: October 30, 2012
    Assignee: Caterpillar Inc.
    Inventors: Benjamin A. Treichel, David L. Collins, Stephen Eric Post
  • HYBRID ENERGY MANAGEMENT SYSTEM
    Publication number: 20110073392
    Abstract: A hybrid energy management system that estimates the net regenerative energy that can be collected during the breaking action of the swing mechanism, then, since this is the net energy that can be used to recharge an energy storage device without using the engine to help recharge the energy storage device, the system limits the use of the energy storage device to that net amount predicted to be available from the recovery period. The net regenerative energy is calculated by considering motor and inverter efficiencies for transferring energy to the battery and changes in the boom/stick/bucket inertia moment.
    Type: Application
    Filed: September 24, 2010
    Publication date: March 31, 2011
    Applicant: Caterpillar Inc.
    Inventors: David L. Collins, Benjamin A. Treichel, Stephen Eric Post