Patents by Inventor John E. Cronk

John E. Cronk 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).

  • Magnetic fuel stabilizer
    Patent number: 5816227
    Abstract: A magnetic fuel stabilizer comprising a fuel line between a metal plate and a magnet. The metal plate is electrically connected to ground by means of a shunt. The magnet comprises a magnet fuel line side in contact with the fuel line at a fuel line magnet side. The metal plate is in contact with the fuel line at a fuel line metal plate side. The magnet further comprises a magnet non-fuel line side opposite the magnet fuel line side, and a magnet right side opposite a magnet left side. The magnet right and left sides are substantially perpendicular to the fuel line.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: October 6, 1998
    Inventor: John E. Cronk
  • Windshield wiper light circuit with optional time delay
    Patent number: 5235250
    Abstract: Improved windshield wiper light circuitry for a device that automatically turns on vehicle head lights and other lights whenever the wipers are on is provided. A double-pole, single-throw relay switch (1) is positioned in vehicle circuitry between the ignition switch (13) and the light switch (14). One of the two poles has as electrical lead (3) to the low-beam head lights and the other (4) to the rear lights, park lights and side lights together. A diode rectifier (12) is provided in circuitry between a line (9) for continuous operation and a line (7) for intermittent operation of a wiper motor (11). A light shut-off delay provided by use of a timer (17) acts as a safety sentry light for a period after the ignition switch (13) is deactivated. A single pole relay switch (19) enables this circuitry to operation any 12-volt windshield wiper system.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: August 10, 1993
    Inventor: John E. Cronk
  • Vehicle windshield wiper light circuit
    Patent number: 4985660
    Abstract: Windshield wiper light circuitry for a device that automatically turns on vehicle head lights and other lights whenever the wipers are on is provided. A double-pole, single-throw relay switch (1) is positioned in vehicle circuitry between the ignition switch (13) and the light switch (14). One of the two poles has as electrical lead (3) to the low-beam head lights and the other (4) to the rear lights, park lights and side lights together. A diode rectifier (12) is provided in circuitry between a line (9) for continuous operation and a line (7) for intermittent operation of a wiper motor (11).
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: January 15, 1991
    Inventor: John E. Cronk