Patents by Inventor Emerson R. Gallagher

Emerson R. Gallagher 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).

  • Patent number: 10892509
    Abstract: A fuel cell stack assembly is disclosed comprising: a fuel cell stack comprising a first end plate, a second end plate, and a plurality of fuel cells interposed between the first and the second end plates; and a compression band which urges the first end plate towards the second end plate along a first face of the fuel cell stack and also along an opposing second face of the fuel stack in a stacking direction thereof in at least two passes on each face of fuel cells stack, thereby applying a compressive force upon the plurality of fuel cells in the fuel cell stack.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: January 12, 2021
    Assignee: BALLARD POWER SYSTEMS INC.
    Inventors: David Myers, George Skinner, Emerson R. Gallagher
  • Publication number: 20180316039
    Abstract: The present invention provides demineralized bone fibers exhibiting optimal handling properties (e.g., high moldability and low elastic modulus) and biological activities (e.g., osteoinductivity) as well as non-demineralized bone fibers useful for preparing the demineralized bone fibers. A well-controlled demineralization process for preparing the demineralized bone of fibers is also provided. Products comprising the demineralized bone fibers and uses thereof are further provided.
    Type: Application
    Filed: June 13, 2016
    Publication date: November 1, 2018
    Inventors: David MYERS, George SKINNER, Emerson R. GALLAGHER
  • Patent number: 9240598
    Abstract: In solid polymer fuel cells employing framed membrane electrode assemblies, a conventional anode compliant seal is employed in combination with a cathode non-compliant seal to provide for a thinner fuel cell design, particularly in the context of a fuel cell stack. This approach is particularly suitable for fuel cells operating at low pressure.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: January 19, 2016
    Assignee: Ballard Power Systems Inc.
    Inventors: Keith M. Martin, Samira Barakat, Emerson R. Gallagher
  • Publication number: 20150030960
    Abstract: In solid polymer fuel cells employing framed membrane electrode assemblies, a conventional anode compliant seal is employed in combination with a cathode non-compliant seal to provide for a thinner fuel cell design, particularly in the context of a fuel cell stack. This approach is particularly suitable for fuel cells operating at low pressure.
    Type: Application
    Filed: August 6, 2014
    Publication date: January 29, 2015
    Inventors: Keith M. Martin, Samira Barakat, Emerson R. Gallagher
  • Patent number: 8828617
    Abstract: In solid polymer fuel cells employing framed membrane electrode assemblies, a conventional anode compliant seal is employed in combination with a cathode non-compliant seal to provide for a thinner fuel cell design, particularly in the context of a fuel cell stack. This approach is particularly suitable for fuel cells operating at low pressure.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: September 9, 2014
    Assignee: Ballard Power Systems Inc.
    Inventors: Keith M. Martin, Samira Barakat, Emerson R. Gallagher
  • Patent number: 8206869
    Abstract: An electrochemical fuel cell stack with integrated anode exhaust valves is disclosed, comprising a plurality of fuel cells, each fuel cell having an anode and at least one anode flow field channel, an anode exhaust manifold fluidly connected to the at least one anode flow field channel of each fuel cell, and a means for minimizing fluid backflow from the anode exhaust manifold into the anode flow field channels of the fuel cells. Methods for purging, and reducing fuel cell voltage variations within, the electrochemical fuel cell stack are also disclosed.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: June 26, 2012
    Assignee: Daimler AG
    Inventors: Emerson R Gallagher, Michael P Sexsmith, Russell H Barton
  • Publication number: 20120034542
    Abstract: In solid polymer fuel cells employing framed membrane electrode assemblies, a conventional anode compliant seal is employed in combination with a cathode non-compliant seal to provide for a thinner fuel cell design, particularly in the context of a fuel cell stack. This approach is particularly suitable for fuel cells operating at low pressure.
    Type: Application
    Filed: December 16, 2009
    Publication date: February 9, 2012
    Applicant: Ballard Power Systems Inc.
    Inventors: Keith M. Martin, Samira Barakat, Emerson R. Gallagher
  • Patent number: 7547482
    Abstract: Improvements in freezing and sub-freezing startup time for an electrochemical fuel cell system may be observed by having a passive coolant microloop using two gear pump heads. During a cold start, a stack valve is initially fully closed and causes all system coolant arriving at the module to run through a driving gear pump head. This causes a driven gear pump head to recirculate coolant inside the module. In an embodiment, the stack valve is a thermostatic valve that begins to open as the coolant begins to warm up. This allows a small bleed of system coolant into the module and decreases the percentage of microloop recirculation. When operating temperature is reached, the thermostatic valve is fully open and system coolant inlet pressure on the driving gear pump head counteracts the pressure on the driven gear pump head, thus stopping recirculation.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: June 16, 2009
    Assignees: Daimler AG, Ford Motor Company
    Inventor: Emerson R Gallagher
  • Publication number: 20080241606
    Abstract: A membrane exchange humidifier for use with a fuel cell system, fuel cell or fuel cell stack includes at least one wet chamber, a plurality of dry chambers, a water permeable sheet membrane; wherein each of the plurality of dry chambers is separated from one or more of the at least one wet chambers by the water permeable sheet membrane, whereby water is capable of being transferred across the water permeable sheet membrane; and a variable flow cross section restriction device fluidly connects to at least one of the plurality of dry chambers.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 2, 2008
    Inventor: Emerson R. Gallagher
  • Publication number: 20080220154
    Abstract: A method of making graphite articles for electrochemical fuel cells, such as fluid flow field plates, by partially impregnating a porous, self-supporting expanded graphite sheet with a first binder comprising a first liquid resin to form a partially impregnated graphite sheet; mechanically deforming at least one surface of the impregnated graphite sheet to form an intermediate fluid flow field plate; impregnating the mechanically deformed intermediate fluid flow field plate with a second binder comprising a second liquid resin to form an impregnated fluid flow field plate; and curing at least the second resin to form a substantially fluid impermeable fluid flow field plate.
    Type: Application
    Filed: March 6, 2008
    Publication date: September 11, 2008
    Inventor: Emerson R. Gallagher
  • Publication number: 20080187788
    Abstract: A fuel cell stack is provided having a plurality of fuel cells, each including a membrane electrode assembly interposed between anode and cathode flow field plates that form anode and cathode channels, respectively. An accumulating device is positioned downstream of the fuel cell stack. A purge control device is positioned downstream of the accumulating device operable in a first state to allow fluid communication between the anode and cathode channels, and in a second state to isolate an oxidant outlet from the accumulating device. Some embodiments include a purge control device between the anode channels and the accumulating device. A method of operation of the fuel cell stack includes selectively purging fluids from the fuel cell stack into the accumulating device at a first time and selectively purging fluids from the accumulating device at a second time, subsequent to the first time.
    Type: Application
    Filed: February 6, 2007
    Publication date: August 7, 2008
    Inventors: Richard G. Fellows, Janusz Blaszczyk, Emerson R. Gallagher, Andrew J. Henderson
  • Patent number: 7390586
    Abstract: Electrochemical fuel cell stacks comprising a plurality of membrane electrode assemblies stacked in an alternating manner, such that the polarity of adjacent membrane electrode assemblies are opposite, are disclosed. The fuel cell stacks comprise a plurality of membrane electrode assemblies, each membrane electrode assembly comprising an anode fluid distribution layer, a cathode fluid distribution layer, a polymer electrolyte membrane interposed between the anode and cathode fluid distribution layers, an anode electrocatalyst layer interposed between the polymer electrolyte membrane and the anode fluid distribution layer, and a cathode electrocatalyst interposed between the polymer electrolyte membrane and the cathode fluid distribution layer, wherein the plurality of membrane electrode assemblies are stacked in an alternating manner such that the polarity of adjacent membrane electrode assemblies are opposite, and wherein the plurality of membrane electrode assemblies are externally jumpered.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: June 24, 2008
    Assignee: Ballard Power Systems, Inc.
    Inventors: Emerson R Gallagher, Maura H Malone
  • Publication number: 20080118798
    Abstract: A power system is disclosed that includes a fuel cell stack primary power source, a secondary power source, a first direct current bus, a first voltage controlled element that electrically couples power from the secondary power source to the first direct current bus when a voltage across the secondary power source is greater than a voltage across the fuel cell stack primary power source, a second voltage controlled element that electrically couples power from the fuel cell stack primary power source to the first direct current bus when the voltage across the fuel cell stack primary power source is greater than the voltage across the secondary power source, and at least one balance of plant load electrically coupled to the first direct current bus.
    Type: Application
    Filed: November 17, 2006
    Publication date: May 22, 2008
    Inventor: Emerson R. Gallagher
  • Patent number: 7374838
    Abstract: An electrochemical fuel cell comprises an anode electrocatalyst layer, a cathode electrocatalyst layer, a polymer electrolyte membrane interposed between the anode and cathode electrocatalyst layers, an anode flow field plate, a cathode flow field plate, an anode fluid distribution layer interposed between the anode flow field plate and the anode electrocatalyst layer, and a cathode fluid distribution layer interposed between the cathode flow field plate and the cathode electrocatalyst layer, wherein at least one of the anode and cathode fluid distribution layers decreases in permeability from an inlet to an outlet of the electrochemical fuel cell. Methods for making a substantially fluid impermeable sheet material having a non-uniform pattern of perforations are also provided.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: May 20, 2008
    Assignee: Ballard Power Systems Inc.
    Inventor: Emerson R. Gallagher
  • Publication number: 20080107933
    Abstract: A system and method for operating a power system with a fuel cell stack and a power source are disclosed. Briefly described, one embodiment is a method that halts a flow of an oxidant to the first fuel cell stack in response to at least one of a power demand of the power system or a load supplied to a power system being less than a threshold, wherein the first amount of power decreases as a residual amount of oxidant in the first fuel cell stack is reacted; operates a fuel recirculation system to recirculate a flow of a fuel to the first fuel cell stack at least during at least a portion of a period while the flow of the oxidant to the first fuel cell stack is halted; and replaces the decreased first amount of power with a corresponding second amount of power from the second power source.
    Type: Application
    Filed: November 2, 2006
    Publication date: May 8, 2008
    Inventor: Emerson R. Gallagher
  • Publication number: 20040253504
    Abstract: An electrochemical fuel cell comprises an anode electrocatalyst layer, a cathode electrocatalyst layer, a polymer electrolyte membrane interposed between the anode and cathode electrocatalyst layers, an anode flow field plate, a cathode flow field plate, an anode fluid distribution layer interposed between the anode flow field plate and the anode electrocatalyst layer, and a cathode fluid distribution layer interposed between the cathode flow field plate and the cathode electrocatalyst layer, wherein at least one of the anode and cathode fluid distribution layers decreases in permeability from an inlet to an outlet of the electrochemical fuel cell. Methods for making a substantially fluid impermeable sheet material having a non-uniform pattern of perforations are also provided.
    Type: Application
    Filed: June 10, 2003
    Publication date: December 16, 2004
    Applicant: Ballard Power Systems Inc.
    Inventors: Alexander Mossman, Emerson R. Gallagher
  • Patent number: 6818165
    Abstract: A method fabricates fluid flow field plates that are suitable for use in an electrochemical fuel cell assembly. Pursuant to the method, a fluid flow field channel region such as, for example, substantially straight, parallel fluid flow field channels, is roller embossed in a sheet of compressible, electrically conductive material such as, for example, expanded graphite sheet material. A fluid distribution region such as, for example, a region containing manifold openings and supply channels, is then reciprocally embossed in the sheet material. A sheet pre-impregnated with a curable polymeric composition, such as pre-impregnated expanded graphite, can be employed, with the curing step being performed after the roller embossing and reciprocal embossing steps.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: November 16, 2004
    Assignee: Ballard Power Systems Inc.
    Inventor: Emerson R. Gallagher
  • Patent number: 6800328
    Abstract: A process for impregnating a porous part is provided. In one embodiment, the process comprises impregnating the part with an impregnant that is not water soluble, and curing the impregnated part in a water bath. In another embodiment, the process comprises impregnating a part with an impregnant that is not water soluble, washing the impregnated part in a washing solution, and then curing the impregnated part in a water bath.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: October 5, 2004
    Assignee: Ballard Power Systems Inc.
    Inventors: Paul Po Hang Fong, Emerson R. Gallagher, Svetlana Loif
  • Patent number: 6783884
    Abstract: A flow field plate assembly for an electrochemical fuel cell comprises two flow field plates, each of which has channels formed on an inner surface of the plate. The plates are alignable with and engage each other such that their cooperating inner surfaces form at least one inner coolant fluid channel. The coolant channel has an essentially constant cross-sectional perimeter along its length, which is defined by the perimeters of the channels of the two plates and their difference in width at the cooperating plate surfaces. Additionally, a flow field plate assembly, which comprises a corrugated flow field plate and a staggered flow field plate, is structurally stronger under compressive load during the fuel cell operation.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: August 31, 2004
    Assignee: Ballard Power Systems Inc.
    Inventors: Peter R. Gibb, Neil V. Davis, Emerson R. Gallagher
  • Publication number: 20030194595
    Abstract: A flow field plate assembly for an electrochemical fuel cell comprises two flow field plates, each of which has channels formed on an inner surface of the plate. The plates are alignable with and engage each other such that their cooperating inner surfaces form at least one inner coolant fluid channel. The coolant channel has an essentially constant cross-sectional perimeter along its length, which is defined by the perimeters of the channels of the two plates and their difference in width at the cooperating plate surfaces. Additionally, a flow field plate assembly, which comprises a corrugated flow field plate and a staggered flow field plate, is structurally stronger under compressive load during the fuel cell operation.
    Type: Application
    Filed: April 12, 2002
    Publication date: October 16, 2003
    Inventors: Peter R. Gibb, Neil V. Davis, Emerson R. Gallagher