Patents by Inventor David H. Read

David H. Read 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 locomotive regenerative energy storage system and method
    Patent number: 8408144
    Abstract: An energy storage car for a locomotive includes a hydraulic energy storage system designed to capture and reuse energy normally lost in dynamic braking. The energy storage car is preferably configured to provide functions sufficient to replace one of multiple locomotives used to pull a freight train. Braking and other methods for improved efficiency of such trains are provided.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: April 2, 2013
    Assignee: The United States of America, as represented by the Administrator of the U.S. Environmental Protection Agency
    Inventor: David H. Read
  • Hydraulic-electric regenerative energy storage system for plug-in hybrid motor vehicles
    Patent number: 8397848
    Abstract: A hydraulic energy storage system (comprising a hydraulic pump/motor, a high pressure hydraulic accumulator, a low pressure hydraulic accumulator/reservoir, and interconnecting hydraulic lines) is incorporated into a EV, HEV, or PHEV to provide hydraulic regenerative braking and propulsive assistance for the vehicle. Implementation of the low cost and long-lasting hydraulic energy storage system in the vehicle, together with the electric energy storage system (comprising a motor/generator and battery pack) of the vehicle, allows significantly reduced demands and higher operating efficiencies for the battery pack, thereby facilitating a more cost-effective, efficient and/or durable overall energy storage system for the vehicle.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: March 19, 2013
    Assignee: The United States of America, as represented by the Administrator of the U.S. Environmental Protection Agency
    Inventor: David H. Read
  • Hydraulic-Electric Regenerative Energy Storage System for Plug-In Hybrid Motor Vehicles
    Publication number: 20120318590
    Abstract: A hydraulic energy storage system (comprising a hydraulic pump/motor, a high pressure hydraulic accumulator, a low pressure hydraulic accumulator/reservoir, and interconnecting hydraulic lines) is incorporated into a EV, HEV, or PHEV to provide hydraulic regenerative braking and propulsive assistance for the vehicle. Implementation of the low cost and long-lasting hydraulic energy storage system in the vehicle, together with the electric energy storage system (comprising a motor/generator and battery pack) of the vehicle, allows significantly reduced demands and higher operating efficiencies for the battery pack, thereby facilitating a more cost-effective, efficient and/or durable overall energy storage system for the vehicle.
    Type: Application
    Filed: August 20, 2012
    Publication date: December 20, 2012
    Inventor: David H. Read
  • Hydraulic-electric regenerative energy storage system
    Patent number: 8297198
    Abstract: A hydraulic energy storage system (comprising a hydraulic pump/motor, a high pressure hydraulic accumulator, a low pressure hydraulic accumulator/reservoir, and interconnecting hydraulic lines) is incorporated into a EV, HEV, or PHEV to provide hydraulic regenerative braking and propulsive assistance for the vehicle. Implementation of the low cost and long-lasting hydraulic energy storage system in the vehicle, together with the electric energy storage system (comprising a motor/generator and battery pack) of the vehicle, allows significantly reduced demands and higher operating efficiencies for the battery pack, thereby facilitating a more cost-effective, efficient and/or durable overall energy storage system for the vehicle.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: October 30, 2012
    Assignee: The United States of America, as represented by the Administrator of the U.S. Environmental Protection Agency
    Inventor: David H. Read
  • Hybrid Locomotive Regenerative Energy Storage System and Method
    Publication number: 20100175579
    Abstract: An energy storage car for a locomotive includes a hydraulic energy storage system designed to capture and reuse energy normally lost in dynamic braking The energy storage car is preferably configured to provide functions sufficient to replace one of multiple locomotives used to pull a freight train. Braking and other methods for improved efficiency of such trains are provided.
    Type: Application
    Filed: March 25, 2010
    Publication date: July 15, 2010
    Inventor: David H. Read
  • Hydraulic-Electric Regenerative Energy Storage System
    Publication number: 20100151989
    Abstract: A hydraulic energy storage system (comprising a hydraulic pump/motor, a high pressure hydraulic accumulator, a low pressure hydraulic accumulator/reservoir, and interconnecting hydraulic lines) is incorporated into a EV, HEV, or PHEV to provide hydraulic regenerative braking and propulsive assistance for the vehicle. Implementation of the low cost and long-lasting hydraulic energy storage system in the vehicle, together with the electric energy storage system (comprising a motor/generator and battery pack) of the vehicle, allows significantly reduced demands and higher operating efficiencies for the battery pack, thereby facilitating a more cost-effective, efficient and/or durable overall energy storage system for the vehicle.
    Type: Application
    Filed: February 24, 2010
    Publication date: June 17, 2010
    Inventor: David H. Read
  • Regenerative energy storage system for hybrid locomotive
    Publication number: 20080083576
    Abstract: An energy storage car for a locomotive includes a hydraulic energy storage system designed to capture and reuse energy normally lost in dynamic braking. The energy storage car is preferably configured to provide functions sufficient to replace one of multiple locomotives used to pull a freight train. Braking methods, and methods to capture and reuse dynamic braking energy on long grades, for such trains are provided.
    Type: Application
    Filed: May 29, 2007
    Publication date: April 10, 2008
    Inventor: David H. Read