Patents by Inventor Donald J. Hammerstrom

Donald J. Hammerstrom 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).

  • Publication number: 20030201674
    Abstract: A DC to DC Converter includes an electrical circuit that allows batteries and other electrical energy storage devices to be charged from or to discharge to a variable voltage DC bus. This electrical circuit also enables seamless integration with other energy storage devices and/or DC power sources, such as fuel cells, to provide DC power for a Power Management System. A Power Management System preferably provides both full power source management and power conditioning. The Power Management System is able to manage power flow to and from multiple, isolated power sources and energy storage devices to deliver high quality alternating current (“AC”) power to a load.
    Type: Application
    Filed: May 27, 2003
    Publication date: October 30, 2003
    Applicant: International Power System, Inc.
    Inventors: Gerald W. Droppo, Lawrence A. Schienbein, Brent Earle Harris, Donald J. Hammerstrom
  • Patent number: 6628011
    Abstract: A DC to DC Converter includes an electrical circuit that allows batteries and other electrical energy storage devices to be charged from or to discharge to a variable voltage DC bus. This electrical circuit also enables seamless integration with other energy storage devices and/or DC power sources, such as fuel cells, to provide DC power for a Power Management System. A Power Management System preferably provides both full power source management and power conditioning. The Power Management System is able to manage power flow to and from multiple, isolated power sources and energy storage devices to deliver high quality alternating current (“AC”) power to a load.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: September 30, 2003
    Assignee: International Power System, Inc.
    Inventors: Gerald W. Droppo, Lawrence A. Schienbein, Brent Earle Harris, Donald J. Hammerstrom
  • Publication number: 20030036806
    Abstract: A power conversion and energy management system preferably includes a controller, one or more standard modules, and a custom (or semi-custom) backplane. The backplane preferably accommodates one or more modules and uses the modules to control power quality and/or flow to one or more input and/or output connections. The standard modules are preferably power modules such as an inverter module, converter module, or grid connect module. In addition to accommodating the modules, the backplane can include system components other than power electronics. The backplane can, for example, include external connectors, disconnects, fusing, and so forth, for a given application. The backplane can further include internal DC and AC buses to interconnect the modules. The backplane can also include a communications module, a user interface, a socket for control firmware, and slots for accommodating the standard modules.
    Type: Application
    Filed: June 24, 2002
    Publication date: February 20, 2003
    Inventors: Lawrence A. Schienbein, Donald J. Hammerstrom, Gerald W. Droppo, Brent Earle Harris
  • Publication number: 20030006745
    Abstract: An interface between software and hardware, as well as a fuzzy logic control algorithm, for controlling a DC-DC converter or an AC-DC or DC-AC inverter are provided. A control circuit receives commands from a control logic to operate a converter or inverter in various operation modes. Control software inputs can be translated into signals to operate the converter or inverter. Control variables in the control software can be configured to operate under various control modes. If the converter or inverter cannot simultaneously meet the demands placed on two or more variables, the control logic can use prioritization to choose a more important constraint.
    Type: Application
    Filed: March 14, 2002
    Publication date: January 9, 2003
    Inventors: Donald J. Hammerstrom, Patrick Harman
  • Patent number: 6494614
    Abstract: A laminated microchannel device is described in which there is a unit operation process layer that has longitudinal channel. The longitudinal channel is cut completely through the layer in which the unit process operation resides. Both the device structure and method of making the device provide significant advantages in terms of simplicity and efficiency. A static mixing unit that can be incorporated in the laminated microchannel device is also described.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: December 17, 2002
    Assignee: Battelle Memorial Institute
    Inventors: Wendy D. Bennett, Donald J. Hammerstrom, Peter M. Martin, Dean W. Matson
  • Publication number: 20020175068
    Abstract: Apparatus and method for using a non-thermal plasma or corona discharge generated at multiple points and distributed to decontaminate surfaces and objects contaminated with chemical or biological agents. The corona discharge can be generated using very short high voltage pulses (pulsed discharge) produced by a Tesla coil. The pulsed corona discharge can be directed at a contaminated surface through the unbraided strands at an end of a dielectric covered conductor. Another pulsed discharge embodiment incorporates a primary coil surrounding a chamber having a void filled with a plurality of secondary coils. A silent corona discharge can be generated using a variety of different configurations of a dielectric coated electrode and a bare electrode. The silent discharge is produced at all intersections between the dielectric covered electrode and the bare electrode.
    Type: Application
    Filed: July 9, 2002
    Publication date: November 28, 2002
    Applicant: MesoSystems Technology, Inc.
    Inventors: Donald J. Hammerstrom, Joseph G. Birmingham, James S. Millar
  • Patent number: 6455014
    Abstract: Apparatus for using a non-thermal plasma or corona discharge generated at multiple points and distributed to decontaminate surfaces and objects contaminated with chemical or biological agents. The corona discharge can be generated using very short high voltage pulses (pulsed discharge) produced by a Tesla coil. The pulsed corona discharge can be directed at a contaminated surface through the unbraided strands at an end of a dielectric covered conductor. Another pulsed discharge embodiment incorporates a primary coil surrounding a chamber having a void filled with a plurality of secondary coils. A silent corona discharge can be generated using a variety of different configurations of a dielectric coated electrode and a bare electrode. The silent discharge is produced at all intersections between the dielectric covered electrode and the bare electrode. The bare electrode can be woven with the dielectric covered electrode or can be coiled helically around, or plated onto, the dielectric covered electrode.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: September 24, 2002
    Assignee: MesoSystems Technology, Inc.
    Inventors: Donald J. Hammerstrom, Joseph G. Birmingham, James S. Millar
  • Publication number: 20020047309
    Abstract: A DC to DC Converter includes an electrical circuit that allows batteries and other electrical energy storage devices to be charged from or to discharge to a variable voltage DC bus. This electrical circuit also enables seamless integration with other energy storage devices and/or DC power sources, such as fuel cells, to provide DC power for a Power Management System. A Power Management System preferably provides both full power source management and power conditioning. The Power Management System is able to manage power flow to and from multiple, isolated power sources and energy storage devices to deliver high quality alternating current (“AC”) power to a load.
    Type: Application
    Filed: July 27, 2001
    Publication date: April 25, 2002
    Inventors: Gerald W. Droppo, Lawrence A. Schienbein, Brent Earle Harris, Donald J. Hammerstrom
  • Patent number: 6267016
    Abstract: A particle collector includes a combined impact collector and fan, which is usable for both drawing air or other gaseous fluid in which particulates are entrained into a cavity, and then separating the particulates from the gaseous fluid by providing a rotating surface that impacts the particulates. The particulates also impact on other surfaces within the cavity, including its inner surface, and are washed from these surfaces, which are wetted with water or other liquid injected into the cavity. The cavity is defined by a housing having an inlet port through which the air or other gaseous fluid is drawn. The combined impact collector and fan includes a plate on which a plurality of spaced-apart impeller vanes are disposed. The shape of the impeller vanes produces a centrifugal fan effect when they are rotated within the cavity.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: July 31, 2001
    Assignee: MesoSystems Technology, Inc.
    Inventors: Patrick T. Call, Vanessa M. Kenning, Charles Call, Joseph G. Birmingham, Donald J. Hammerstrom
  • Patent number: 5989824
    Abstract: Bacteria cells and/or spores are collected and concentrated to form a specimen that is lysed using an ionized fluid to facilitate identification of the bacterial cells or spores by tests performed on the DNA and RNA contained therein. An impact collector is preferably used for separating the spores and cells from an air sample that is drawn through an input port of a portable housing. The resulting specimen is then exposed to an ionizing discharge that ruptures the surface membrane of the bacterial cells or spores. The ionizing discharge can be produced by a Tesla coil or other potential transformer that is electrically energized to produce an ionization potential, which is applied to an electrode, or to produce a corona glow discharge spread over a relatively larger surface of a plate-type electrode. Alternatively, air or another gaseous fluid in proximity to the electrode may be ionized by the ionizing potential or discharge from the electrode, forming an ionized fluid that is applied to the specimen.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: November 23, 1999
    Assignee: MesoSystems Technology, Inc.
    Inventors: Joseph G. Birmingham, Donald J. Hammerstrom
  • Patent number: 5631820
    Abstract: The invention is an improvement of the PASC inverter, wherein the improvements include the reduction from two shorting gates per transformer to one shorting gate per transformer and replacement of active control of the shorting gate with passive control of the shorting gate. Further advantages are obtained through the use of anti-parallel gate sets.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: May 20, 1997
    Assignee: Battelle Memorial Institute
    Inventors: Matthew K. Donnelly, Donald J. Hammerstrom