Patents by Inventor Rudolf Hermann

Rudolf Hermann 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).

  • Air volume flow and pushing force control device
    Patent number: 8776307
    Abstract: The invention relates to an air volume flow and pushing force control device for a vacuum cleaner that has at least a motor, a dust receptacle and a suction nozzle, comprising a controller for controlling the motor power, a first sensor for detecting the air volume flow, which in conjunction with the controller forms a first control loop in order to maintain the air volume flow at a prescribed air volume flow value on the basis of the signal of the first sensor. The control device further comprises a second sensor for detecting a pushing force that is required for pushing the suction nozzle, and in conjunction with the controller, forms a second control loop in order to maintain the pushing force below a prescribed value on the basis of the signal of the second sensor, and a control loop selection device that activates one of the two control loops as a function of the signals of the two sensors.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: July 15, 2014
    Inventors: Detlef Schulz, Thomas Strehler, Rudolf Hermann, Roland Illig, Peter Lehmann, Silvio Hamm
  • AIR VOLUME FLOW AND PUSHING FORCE CONTROL DEVICE
    Publication number: 20100300489
    Abstract: The invention relates to an air volume flow and pushing force control device for a vacuum cleaner that has at least a motor, a dust receptacle and a suction nozzle, comprising a controller for controlling the motor power, a first sensor for detecting the air volume flow, which in conjunction with the controller forms a first control loop in order to maintain the air volume flow at a prescribed air volume flow value on the basis of the signal of the first sensor. The control device further comprises a second sensor for detecting a pushing force that is required for pushing the suction nozzle, and in conjunction with the controller, forms a second control loop in order to maintain the pushing force below a prescribed value on the basis of the signal of the second sensor, and a control loop selection device that activates one of the two control loops as a function of the signals of the two sensors.
    Type: Application
    Filed: May 28, 2010
    Publication date: December 2, 2010
    Inventors: Detlef SCHULZ, Thomas Strehler, Rudolf Hermann, Roland Illig, Peter Lehmann, Silvio Hamm