1
James F McElroy, James H Kralick: Enthalpy recovery fuel cell system. Plug Power, Fish & Richardson P C, December 11, 2001: US06329090 (92 worldwide citation)

The invention relates to an enthalpy recovery fuel cell system. Water leaving the fuel cell in the cathode gas output stream is transferred to the cathode gas input stream. The dew point of the input stream of the cathode gas is about the same as the temperature of the leading edge of the active are ...


2
Uriel M Oko, James H Kralick: Fuel cell system having humidification membranes. Plug Power, Fish & Richardson P C, September 4, 2001: US06284399 (51 worldwide citation)

The invention relates to a fuel cell system having membranes that are used to humidify reactant gases. The membranes effectively prevent contamination of the reactant gases during humidification. The membranes can be used to purify the reactant gases during humidification.


3
James H Kralick: Auxiliary bearing design for active magnetic bearings. Mechanical Technology Incorporated, Joseph V Claeys, Joseph C Sullivan, June 4, 1991: US05021697 (35 worldwide citation)

A magnetic bearing rotating structure includes a rotor magnetically supported in a housing by a magnetic bearing. A back-up bearing arrangement is used to resist impact on the rotor, including a fixed bumper bearing for resisting a sudden impact, and an auxiliary bearing for rotatably supporting the ...


4
Michael M Walsh, James H Kralick, Daniel F Woolley: Manifold system for a fuel cell stack. Plug Power, Trop Pruner & Hu P C, April 1, 2003: US06541148 (18 worldwide citation)

A fuel cell system includes a fuel cell stack, a manifold and a hinge. The manifold forms a sealed interface to communicate reactants with the stack, and the hinge forms a pivotable connection between the stack and the manifold. The fuel cell system also includes at least one gas/water separator tha ...


5
James H Kralick: Sealing method and apparatus for a fuel cell stack. Plug Power, Trop Pruner & Hu P C, July 30, 2002: US06426159 (7 worldwide citation)

A fuel cell stack includes a stack of flow plates, a first gasket that is compatible with a coolant and a second gasket that is incompatible with the coolant. The stack of flow plates includes openings to form a coolant passageway that communicates the coolant and a reactant manifold passageway. The ...


6
James H Kralick: Cooling a fuel cell stack. Plug Power, Trop Pruner & Hu P C, November 13, 2001: US06316137 (6 worldwide citation)

A fuel cell system includes a fuel cell stack and a pump system. The pump system circulates a coolant through the fuel cell stack. The coolant is substantially electrically non-conductive and has a freezing point substantially below the freezing point of water.


7
James H Kralick: Mist evaporation system for fuel cell hydration. Plug Power, Heslin Rothenberg Farley & Mesiti P C, February 26, 2002: US06350535 (5 worldwide citation)

A system for humidifying reactant gas for a fuel cell includes a supply line for supplying reactant gas to a fuel cell, a mist humidifier for producing liquid droplets in the reactant gas, and an evaporator for evaporating the liquid droplets. The evaporator may use a portion of the heat generated b ...


8
James H Kralick: Cooling method and apparatus for use with a fuel cell stack. Plug Power, Trop Pruner & Hu P C, March 12, 2002: US06355368 (5 worldwide citation)

A system includes a stack of fuel cell flow plates and a condenser. The stack of fuel cell flow plates include openings to form an inlet manifold passageway and an outlet manifold passageway to communicate a coolant through the stack. The flow plates are capable of transferring thermal energy to the ...


9
James H Kralick: Retractable air supply connector system for a fuel cell assembly. Delphi Technologies, Paul L Marshall, September 7, 2004: US06786254 (4 worldwide citation)

In a retractable air supply connection system for air supply lines extending between a blower supply plenum and hot zone components of a solid-oxide fuel cell assembly, each such hot zone component is provided with a socket for receiving a retractable connector. Each connector has first and second c ...


10
James H Kralick: Fuel cell coolant tank system. Power Plug, Fish & Richardson P C, May 11, 2004: US06733910 (2 worldwide citation)

A fuel cell coolant tank system includes a fuel cell stack including a plurality of fuel cells, a coolant manifold, and a coolant outlet manifold. A coolant expansion tank above the fuel cell stack has an input connected to the coolant inlet manifold of the fuel cell stack and an output connected to ...