Patents by Inventor Ralf Heinrich

Ralf Heinrich 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).

  • Publication number: 20040105209
    Abstract: A circuitry configuration for an electromagnetic regeneration valve actuatable by pulse-width modulation for venting the tank of a motor vehicle is described, having a power source for supplying the solenoid of the regeneration valve with electricity, a control unit for generating pulse-width-modulated signals and a switching device via which the solenoid is able to receive the pulse-width-modulated signals of the control unit. Means are provided for suppressing high induced voltages at the solenoid. This measure considerably reduces the noise generation during operation of the regeneration valve, both in pulsed and in proportional mode.
    Type: Application
    Filed: September 18, 2003
    Publication date: June 3, 2004
    Applicant: Carl Freudenberg KG
    Inventors: Torsten Gerlich, Christopher Klatt, Ralf Heinrich, Christoph Klesen