Patents by Inventor Karl-Heinz Landenberger

Karl-Heinz Landenberger 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).

  • Apparatus and method of monitoring insulation of a DC network that is electrically insulated with respect to the ground potential of a device
    Patent number: 6864688
    Abstract: Insulation monitoring of an electrical network such as a DC network which is electrically insulated with respect to the ground of a device, includes at least two insulation monitoring devices that monitor different network sections, which can be isolated by one or more switches. Non-contacting switches are used to alternatingly connect and isolate respective measuring resistors of the monitoring devices to, and from, ground, as a result of which the insulation monitoring devices can not negatively affect each other's measurements.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: March 8, 2005
    Assignee: Ballard Power Systems AG
    Inventors: Klaus Beutelschiess, Karl-Heinz Landenberger
  • Apparatus and method of monitoring insulation of a DC network that is electrically insulated with respect to the ground potential of a device
    Publication number: 20030214306
    Abstract: Insulation monitoring of an electrical network such as a DC network which is electrically insulated with respect to the ground of a device, includes at least two insulation monitoring devices that monitor different network sections, which can be isolated by one or more switches. Non-contacting switches are used to alternatingly connect and isolate respective measuring resistors of the monitoring devices to, and from, ground, as a result of which the insulation monitoring devices can not negatively affect each other's measurements.
    Type: Application
    Filed: February 26, 2003
    Publication date: November 20, 2003
    Applicant: Ballard Power Systems AG
    Inventors: Klaus Beutelschiess, Karl-Heinz Landenberger