Patents by Inventor Peter Woerwag

Peter Woerwag 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).

  • Patent number: 8752241
    Abstract: A suction nozzle has a housing, a tilting bearing, a connection nozzle, a lock for the tilting bearing, a connection nozzle, a lock for the tilting bearing, actuators and a housing duct. The tilting joint has a bearing connected rigidly to the housing and a connector piece which is pivotally mounted about an axis S. The lock has a first locking element, which is mounted rotatably on the housing, and a second locking element, which is rigidly connected to the connecting piece of the tilting joint. A restoring force for the first locking element is generated by magnets.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: June 17, 2014
    Assignee: Duepro AG
    Inventor: Peter Woerwag
  • Publication number: 20120090131
    Abstract: A suction nozzle has a housing, a tilting bearing, a connection nozzle, a lock for the tilting bearing, a connection nozzle, a lock for the tilting bearing, actuators and a housing duct. The tilting joint has a bearing connected rigidly to the housing and a connector piece which is pivotally mounted about an axis S. The lock has a first locking element, which is mounted rotatably on the housing, and a second locking element, which is rigidly connected to the connecting piece of the tilting joint. A restoring force for the first locking element is generated by magnets.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 19, 2012
    Inventor: Peter WOERWAG
  • Patent number: 4394606
    Abstract: Disclosed is an apparatus for controlling the rotational speed of an electric motor based upon the load encountered by the electric motor. A load sensor provides a voltage level based upon the operating load of the electric motor and accumulates this voltage in accordance with the cycle of the alternating current supplied to the motor. If during a cycle of the alternating current, the voltage exceeds a predetermined level, a transistor will be biassed into conduction, said transistor turning off a thyristor and preventing any further conduction of the thyristor during that cycle of the alternating current. Thus the duty cycle of the thyristor determines the total amount of current supplied to the electric motor and this current level determines the rotational rpm of the motor.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: July 19, 1983
    Assignee: Dupro A.G.
    Inventor: Peter Woerwag
  • Patent number: 4370777
    Abstract: Disclosed is an improvement in a vacuum cleaner having a roller-shaped brush mounted in the vacuum nozzle thereof. A separate rotational speed control is provided for the electric motor which operates the roller-shaped brush and in preferred embodiments this rotational speed control is adjustable by the operator of the vacuum cleaner. In a further embodiment, two separate rotational speed controls are provided, one controlling the speed of the roller-brush motor and the other controlling the speed of the vacuum-generating motor. A still further embodiment comprises a single rotational speed control which can be interchangeably switched into or out of connection with either the roller-brush motor or the vacuum-generating motor. A still further embodiment discloses a roller-brush motor speed control which can be added to existing vacuum cleaners.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: February 1, 1983
    Assignee: Duepro AG
    Inventor: Peter Woerwag