Patents by Inventor Ralph H. Johnston

Ralph H. Johnston 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: 7145259
    Abstract: A power module is connected to the starter, alternator, and battery for an internal combustion engine. The power module includes one or more capacitors and delay timer. When the ignition switch closes, the battery of the starting system provides current to the starter motor, causing the starter solenoid to close the starter contacts, and bring a starter pinion gear into engagement with a flywheel ring gear. The delay timer does not allow the capacitor to immediately deliver current to the starter motor, but implements a short delay before the capacitor's current is released to the starter motor. This short delay increases the chance for full engagement between the starter pinion and the flywheel ring gear, thereby reducing the likelihood of milling when the starter motor provides torque to the starter pinion.
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: December 5, 2006
    Assignee: Remy Inc.
    Inventors: James A. Spellman, David A. Fulton, Ralph H. Johnston
  • Patent number: 6895175
    Abstract: Systems, methods, and apparatus, consistent with principles of the present invention, allow an unmodified device, for example, a dc starter motor, that normally operates at a first voltage to function in an electrical system providing a second voltage, which is different from the first voltage, and received from the power source. A device actuator, such as a solenoid, is controlled using the second voltage. The first voltage is produced and supplied to the device in response to a first action of the actuator, for example, upon solenoid depression. This voltage is then inhibited from being provided to the device in response to a second action of the actuator, for example, upon solenoid retraction after engine cranking.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: May 17, 2005
    Assignee: Cummins, Inc.
    Inventors: David A. Fulton, Ralph H. Johnston
  • Publication number: 20030063899
    Abstract: Systems, methods, and apparatus, consistent with principles of the present invention, allow an unmodified device, for example, a dc starter motor, that normally operates at a first voltage to function in an electrical system providing a second voltage, which is different from the first voltage, and received from the power source. A device actuator, such as a solenoid, is controlled using the second voltage. The first voltage is produced and supplied to the device in response to a first action of the actuator, for example, upon solenoid depression. This voltage is then inhibited from being provided to the device in response to a second action of the actuator, for example, upon solenoid retraction after engine cranking.
    Type: Application
    Filed: October 1, 2001
    Publication date: April 3, 2003
    Applicant: Delco Remy America, Inc.
    Inventors: David A. Fulton, Ralph H. Johnston
  • Patent number: 4536697
    Abstract: In a charge/float vehicle electrical system, heavy battery charging is effected during periods of engine deceleration and the float voltage is adjusted so as to maintain the battery state of charge at the level in existence at the initiation of the float mode.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: August 20, 1985
    Assignee: General Motors Corporation
    Inventors: Ralph H. Johnston, Curtis D. Munden, Leonard J. Sheldrake