Patents by Inventor Robert C. DeVault

Robert C. DeVault 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: 7849944
    Abstract: A system is provided to instruct a plug-in hybrid electric vehicle how optimally to use electric propulsion from a rechargeable energy storage device to reach an electric recharging station, while maintaining as high a state of charge (SOC) as desired along the route prior to arriving at the recharging station at a minimum SOC. The system can include the step of calculating a straight-line distance and/or actual distance between an orientation point and the determined instant present location to determine when to initiate optimally a charge depleting phase. The system can limit extended driving on a deeply discharged rechargeable energy storage device and reduce the number of deep discharge cycles for the rechargeable energy storage device, thereby improving the effective lifetime of the rechargeable energy storage device. This “Just-in-Time strategy can be initiated automatically without operator input to accommodate the unsophisticated operator and without needing a navigation system/GPS input.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: December 14, 2010
    Assignee: UT-Battelle, LLC
    Inventor: Robert C. DeVault
  • Patent number: 7665524
    Abstract: Apparatus for efficient heating of subterranean earth includes a well-casing that has an inner wall and an outer wall. A heater is disposed within the inner wall and is operable within a preselected operating temperature range. A heat transfer metal is disposed within the outer wall and without the inner wall, and is characterized by a melting point temperature lower than the preselected operating temperature range and a boiling point temperature higher than the preselected operating temperature range.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: February 23, 2010
    Assignee: UT-Battelle, LLC
    Inventors: Robert C. DeVault, David J. Wesolowski
  • Publication number: 20090114463
    Abstract: A system is provided to instruct a plug-in hybrid electric vehicle how optimally to use electric propulsion from a rechargeable energy storage device to reach an electric recharging station, while maintaining as high a state of charge (SOC) as desired along the route prior to arriving at the recharging station at a minimum SOC. The system can include the step of calculating a straight-line distance and/or actual distance between an orientation point and the determined instant present location to determine when to initiate optimally a charge depleting phase. The system can limit extended driving on a deeply discharged rechargeable energy storage device and reduce the number of deep discharge cycles for the rechargeable energy storage device, thereby improving the effective lifetime of the rechargeable energy storage device. This “Just-in-Time strategy can be initiated automatically without operator input to accommodate the unsophisticated operator and without needing a navigation system/GPS input.
    Type: Application
    Filed: June 12, 2008
    Publication date: May 7, 2009
    Inventor: Robert C. DeVault
  • Publication number: 20080078551
    Abstract: Apparatus for efficient heating of subterranean earth, which includes a heater that is operable within a preselected operating temperature range and a heat transfer means interposed between the heater and a subterranean earth for transferring heat from the heater to the subterranean earth, the heat transfer means configured for down-hole insertion into a well, the heat transfer means including a container and a heat transfer metal within the container, the heat transfer metal characterized by a melting point temperature lower than the preselected operating temperature range and a boiling point temperature higher than the preselected operating temperature range.
    Type: Application
    Filed: September 29, 2006
    Publication date: April 3, 2008
    Applicant: UT-BATTELLE, LLC
    Inventors: Robert C. DeVault, David J. Wesolowski
  • Patent number: 5532532
    Abstract: A hermetically sealed superconducting magnet motor includes a rotor separated from a stator by either a radial gap, an axial gap, or a combined axial and radial gap. Dual conically shaped stators are used in one embodiment to levitate a disc-shaped rotor made of superconducting material within a conduit for moving cryogenic fluid. As the rotor is caused to rotate when the field stator is energized, the fluid is pumped through the conduit.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: July 2, 1996
    Assignee: Martin Marietta Energy Systems, Inc.
    Inventors: Robert C. DeVault, Benjamin W. McConnell, Benjamin A. Phillips
  • Patent number: 5467614
    Abstract: A dual circuit absorption refrigeration system comprising a high temperature single-effect refrigeration loop and a lower temperature double-effect refrigeration loop separate from one another and provided with a double-condenser coupling therebetween. The high temperature condenser of the single-effect refrigeration loop is double coupled to both of the generators in the double-effect refrigeration loop to improve internal heat recovery and a heat and mass transfer additive such as 2-ethyl-1-hexanol is used in the lower temperature double-effect refrigeration loop to improve the performance of the absorber in the double-effect refrigeration loop.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: November 21, 1995
    Assignee: Martin Marietta Energy Systems, Inc.
    Inventor: Robert C. DeVault
  • Patent number: 5205136
    Abstract: A triple effect absorption refrigeration system is provided with a double-condenser coupling and a parallel or series circuit for feeding the refrigerant-containing absorbent solution through the high, medium, and low temperature generators utilized in the triple-effect system. The high temperature condenser receiving vaporous refrigerant from the high temperature generator is double coupled to both the medium temperature generator and the low temperature generator to enhance the internal recovery of heat within the system and thereby increase the thermal efficiency thereof.
    Type: Grant
    Filed: March 11, 1992
    Date of Patent: April 27, 1993
    Assignee: Martin Marietta Energy Systems, Inc.
    Inventors: Robert C. DeVault, Wendell J. Biermann
  • Patent number: 4934149
    Abstract: A method is disclosed for reducing chloroflurocarbon (CFC) refrigerant emissions during removal or transfer or refrigerants from a vapor compression cooling system or heat pump which comprises contacting the refrigerant with a suitable sorbent material. The sorbent material allows for the storage and retention or the chlorofluorocarbon in non-gaseous form so that it does not tend to escape to the atmosphere where it would cause harm by contributing to ozone depletion. In other aspects of the invention, contacting of CFC refrigerants with sorbent material allows for purification and recycling of used refrigerant, and a device containing stored sorbent material can be employed in the detection of refrigerant leakage in a cooling system or heat pump.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: June 19, 1990
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Robert C. DeVault, Phillip D. Fairchild, Wendell J. Biermann
  • Patent number: 4827728
    Abstract: A seven-effect absorption refrigeration cycle is disclosed utilizing three absorption circuits. In addition, a heat exchanger is used for heating the generator of the low absorption circuit with heat rejected from the condenser and absorber of the medium absorption circuit. A heat exchanger is also provided for heating the generator of the medium absorption circuit with heat rejected from the condenser and absorber of the high absorption circuit. If desired, another heat exchanger can also be provided for heating the evaporator of the high absorption circuit with rejected heat from either the condenser or absorber of the low absorption circuit.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: May 9, 1989
    Assignee: Martin Marietta Energy Systems, Inc.
    Inventors: Robert C. DeVault, Wendell J. Biermann
  • Patent number: 4732008
    Abstract: A triple effect absorption method and apparatus having a high coefficient of performance. Two single effect absorption circuits are combined with heat exchange occurring between a condenser and absorber of a high temperature circuit, and a generator of a low temperature circuit. The evaporators of both the high and low temperature circuits provide cooling to an external heat load.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: March 22, 1988
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Robert C. DeVault