Patents by Inventor Holger Holfelder

Holger Holfelder 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).

  • Detecting blockage of a duct of a burner assembly
    Patent number: 11231174
    Abstract: The present disclosure deals with the detection of a blockage in the air-supply duct or flue of a burner assembly. In some embodiments, a method or system may detect blockages in the form of coverings and with burner assemblies to burn fossil fuels. For example, a control device may generate: a first air-control signal; a fuel-control signal by adjusting the actual values of the ionization current to the ionization-current setpoint; a setpoint increased by a specified amount from the ionization-current setpoint; and a changed fuel-control signal by adjusting the actual values of the ionization current to the increased setpoint in the case of a first air-control signal. The control device may evaluate the changed fuel-control signal generated based on the increased setpoint by comparing it with a specified maximum value and based on the evaluation, to detect a blockage.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: January 25, 2022
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Bernd Schmiederer, Holger Holfelder, Rainer Lochschmied
  • Detecting Blockage Of A Duct
    Publication number: 20180274782
    Abstract: The present disclosure deals with the detection of a blockage in the air-supply duct or flue of a burner assembly. In some embodiments, a method or system may detect blockages in the form of coverings and with burner assemblies to burn fossil fuels. For example, a control device may generate: a first air-control signal; a fuel-control signal by adjusting the actual values of the ionization current to the ionization-current setpoint; a setpoint increased by a specified amount from the ionization-current setpoint; and a changed fuel-control signal by adjusting the actual values of the ionization current to the increased setpoint in the case of a first air-control signal. The control device may evaluate the changed fuel-control signal generated based on the increased setpoint by comparing it with a specified maximum value and based on the evaluation, to detect a blockage.
    Type: Application
    Filed: March 23, 2018
    Publication date: September 27, 2018
    Applicant: Siemens Aktiengesellschaft
    Inventors: Bernd Schmiederer, Holger Holfelder, Rainer Lochschmied