Patents by Inventor Alexander Hackl

Alexander Hackl 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).

  • BRAKE SHOE FOR SELF-CLAMPING RETENTION OF A UNIT THAT IS TRANSPORTABLE ON RAILS
    Publication number: 20250305549
    Abstract: A brake shoe that is lockable to a rail head of a rail for securing a unit transportable on rails, in particular a high-voltage device, such as a transformer. To maintain the position of the unit securely on a rail in a simple manner, the brake shoe is provided with a frame designed to clasp around at least portions of the rail head and at least one clamping element movably held in the frame. The brake shoe produces self-retaining clamping of the rail between the frame and the at least one clamping element.
    Type: Application
    Filed: March 26, 2025
    Publication date: October 2, 2025
    Inventors: Alexander Hackl, Michael Bachl, Peter Dichlberger
  • Method for reducing the noise emission of a transformer
    Patent number: 9020156
    Abstract: A method for reducing the noise emission of a transformer, the transformer tank of which is filled with liquid and the tank wall of which vibrates during operation, is provided. The method is characterized by the sequence of the following method steps: detecting natural frequency values of the tank wall for at least one excitation frequency; determining at least one eigenmode for which the vibration of the tank wall is composed at an excitation frequency, from the natural frequency values, wherein areas of large curvature are determined on the tank wall; arranging at least one vibration loading device in at least one of said areas; and controlling the at least one vibration loading device by means of a control device in order to counteract the vibration of the tank wall.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: April 28, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Andreas Dantele, Alexander Hackl, Johannes Korak, Thomas Rittenschober, Helmut Wernick
  • Method For Reducing The Noise Emission Of A Transformer
    Publication number: 20120121101
    Abstract: A method for reducing the noise emission of a transformer, the transformer tank of which is filled with liquid and the tank wall of which vibrates during operation, is provided. The method is characterized by the sequence of the following method steps: detecting natural frequency values of the tank wall for at least one excitation frequency; determining at least one eigenmode for which the vibration of the tank wall is composed at an excitation frequency, from the natural frequency values, wherein areas of large curvature are determined on the tank wall; arranging at least one vibration loading device in at least one of said areas; and controlling the at least one vibration loading device by means of a control device in order to counteract the vibration of the tank wall.
    Type: Application
    Filed: July 24, 2009
    Publication date: May 17, 2012
    Inventors: Andreas Dantele, Alexander Hackl, Johannes Korak, Thomas Rittenschober, Helmut Wernick