Patents by Inventor James A. Whitfield

James A. Whitfield 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: 8930052
    Abstract: The present invention relates to a method and an apparatus for controlling the drive system for mobile equipment, when the operator's drive commander is kept constant, electric traction motors are controlled by a torque controller to provide uniform torque, deviations in speeds of the electric traction motors are determined and electric motor power of at least one is varied relatively to the electric motor power of the other in response to a determined deviation in speed to keep the torques uniform. The power control balancing compensates for the torque differences previously encountered when the speeds of the traction motors differ at equal power supplied to the traction motors.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: January 6, 2015
    Assignee: Liebherr Mining Equipment Company
    Inventor: James A. Whitfield
  • Publication number: 20120130578
    Abstract: The present invention relates to a method and an apparatus for controlling the drive system for mobile equipment, when the operator's drive commander is kept constant, electric traction motors are controlled by a torque controller to provide uniform torque, deviations in speeds of the electric traction motors are determined and electric motor power of at least one is varied relatively to the electric motor power of the other in response to a determined deviation in speed to keep the torques uniform. The power control balancing compensates for the torque differences previously encountered when the speeds of the traction motors differ at equal power supplied to the traction motors.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 24, 2012
    Applicant: Liebherr Mining Equipment Company
    Inventor: James A. Whitfield
  • Patent number: 7820076
    Abstract: The invention relates to an oleaginous mildew and corrosion-inhibiting composition, and the use of said composition to protect metal from corrosion and mildew. The composition comprises, in parts by weight, from about 20 to 60 parts of an oleaginous material such as a lubricating oil, 10 to 40 parts of organic solvent, 20 to 60 parts of corrosion-inhibitor consisting of a sulfonic acid-carboxylic acid metal complex or a mixture of said metal complex with a small but effective amount of an oil soluble alkyl phosphate, from 0.1 to 2.0 parts of an oil soluble antioxidant, from 0.0 to 5.0 parts of a water-displacing compound, an effective amount of a mildew-inhibiting compound, and from 0.0 to 1.0 part of a heterocyclic metal deactivator.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: October 26, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: El Sayed S. Arafat, Craig A. Matzdorf, James A. Whitfield
  • Patent number: 7629004
    Abstract: This invention comprises a composition and the process of using the composition for removing and preventing mold, mildew, and fungal growth. The composition comprises at least one alkali metal perborate, at least one inhibiting compound selected from the group consisting of alkali metal silicates, triazoles and mixtures thereof in any ratio, at least one corrosion inhibitor, and effective amounts of surfactant.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: December 8, 2009
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: El Sayed S. Arafat, Craig A. Matzdorf, Stephen J. Spadafora, David L. Gauntt, Paul R. Roser, James A. Whitfield
  • Patent number: 7494670
    Abstract: This invention comprises a composition and the process of using the composition for removing and preventing mold, mildew, and fungal growth. The composition comprises at least one alkali metal perborate, at least one inhibiting compound selected from the group consisting of alkali metal silicates, triazoles and mixtures thereof in any ratio, at least one corrosion inhibitor, and effective amounts of surfactant.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: February 24, 2009
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: El Sayed S. Arafat, Craig A. Matzdorf, Stephen J. Spadafora, David L. Gauntt, Paul R. Roser, James A. Whitfield
  • Publication number: 20060280808
    Abstract: This invention comprises a composition and the process of using the composition for removing and preventing mold, mildew, and fungal growth. The composition comprises at least one alkali metal perborate, at least one inhibiting compound selected from the group consisting of alkali metal silicates, triazoles and mixtures thereof in any ratio, at least one corrosion inhibitor, and effective amounts of surfactant.
    Type: Application
    Filed: June 10, 2005
    Publication date: December 14, 2006
    Inventors: El Sayed Arafat, Craig Matzdorf, Stephen Spadafora, David Gauntt, Paul Roser, James A. Whitfield
  • Patent number: 5957291
    Abstract: A cue stick holder is provided with at least one cue stick receiving aperture for maintaining a cue stick in an upright orientation. The cue stick receiving aperture may be either completely enclosed or partially enclosed. The cue stick holder is supported on a cue stick case for selective movement between a normally horizontal orientation wherein the cue stick receiving aperture is adapted to receive a cue stick therein and a storage orientation. Alternatively, the cue stick holder may comprise a cue stick receiving aperture and an adhesive layer or mechanical attachment for securing the cue stick holder at a desired location.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: September 28, 1999
    Inventor: James A. Whitfield, Sr.