Patents by Inventor Henry Lehmann

Henry Lehmann 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: 9561808
    Abstract: A method for controlling a magnetic rail brake device of a rail vehicle, wherein the device contains at least one solenoid of a magnet rail brake, said solenoid being fed from a source of electrical energy via an electrical connection, wherein upon a magnet rail brake activation signal the electrical connection between the source of electrical energy and the at least one solenoid of the magnet rail brake is established and upon a magnet rail brake de-activation signal same is disconnected, in order to excite the at least one solenoid to generate a magnetic force or de-excite said at least one solenoid.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: February 7, 2017
    Assignee: KNORR-BREMSE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNG
    Inventors: Henry Lehmann, Peter Schlager, Bernhard Gross
  • Patent number: 9358992
    Abstract: A magnetic rail brake device includes a magnetic main part and pole shoes with friction surfaces. The friction surfaces of the pole shoes are made of the material of the main part in first regions and of a different material in second regions.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: June 7, 2016
    Assignee: KNORR-BREMSE SYSTEME FUR SCHIENENFAHRZEUGE GMBH
    Inventors: Henry Lehmann, Richard Rathammer, Stephen Bradley, Csaba Nemeth
  • Patent number: 9278701
    Abstract: A brake control device for a brake system of a rail vehicle, wherein the brake control device is designed to control at least one electromagnetic track brake device of the brake system on the basis of rail condition data. Also disclosed is a corresponding brake system, a rail vehicle, and a corresponding method.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: March 8, 2016
    Assignee: KNORR-BREMSE SYSTEME FUR SCHIENENFAHRZEUGE GMBH
    Inventors: Marc-Gregory Elstorpff, Henry Lehmann, Richard Rathammer
  • Publication number: 20150183447
    Abstract: A method for controlling a magnetic rail brake device of a rail vehicle, wherein the device contains at least one solenoid of a magnet rail brake, said solenoid being fed from an source of electrical energy via an electrical connection, wherein upon a magnet rail brake activation signal the electrical connection between the source of electrical energy and the at least one solenoid of the magnet rail brake is established and upon a magnet rail brake de-activation signal same is disconnected, in order to excite the at least one solenoid to generate a magnetic force or de-excite said at least one solenoid.
    Type: Application
    Filed: July 3, 2013
    Publication date: July 2, 2015
    Inventors: Henry Lehmann, Peter Schlager, Bernhard Gross
  • Publication number: 20150122600
    Abstract: A magnetic rail brake device includes a magnetic main part and pole shoes with friction surfaces. The friction surfaces of the pole shoes are made of the material of the main part in first regions and of a different material in second regions.
    Type: Application
    Filed: May 28, 2013
    Publication date: May 7, 2015
    Applicant: KNORR-BREMSE GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Henry Lehmann, Richard Rathammer, Stephen Bradley, Csaba Nemeth
  • Publication number: 20140246282
    Abstract: A brake control device for a brake system of a rail vehicle, wherein the brake control device is designed to control at least one electromagnetic track brake device of the brake system on the basis of rail condition data. Also disclosed is a corresponding brake system, a rail vehicle, and a corresponding method.
    Type: Application
    Filed: August 10, 2012
    Publication date: September 4, 2014
    Applicant: KNORR-BREMSE SYSTEME FÜR SCHIENENFAHRZEUGE GmbH
    Inventors: Marc-Gregory Elstorpff, Henry Lehmann, Richard Rathammer
  • Publication number: 20140246277
    Abstract: A device for supplying at least one electrical excitation coil with at least one electrical current pulse in order to alternatively permanent-magnetize or demagnetize at least one magnet segment containing hard magnetic material of a brake magnet of a track brake of a rail vehicle. The device has at least one long-term energy store and at least one magnetization circuit with a voltage transformer and having a switching device connected in an electrically conductive manner to the high-current energy store at one end and to the excitation coil at the other end, by means of which switching device current pulses to the excitation coil that are based on the electrical energy stored in the high-current energy store and that can be alternatively varied regarding the current flow direction can be switched according to the control signals controlled by a control device.
    Type: Application
    Filed: July 26, 2012
    Publication date: September 4, 2014
    Applicant: KNORR-BREMSE GESELLSCHAFT MT BESCHRÄNKTER HAFTUNG
    Inventors: Wolfgang Widl, Peter Schlager, Henry Lehmann, Janusz Mozdzen
  • Patent number: 8604807
    Abstract: Operative monitoring of track brakes involves passing an electric current through a winding of a brake magnet, measuring the electric current and comparing the temporal progression of the measured current with a saved temporal progression of a reference current. Comparison is achieved by calculating the difference between the measured current and the reference current. The difference between measured current and reference current may be temporally integrated and compared with a threshold value. To determine a magnetic coupling between track brake and track, a calculation may be made as to whether the measured current has local minima and/or local maxima during the activation of the track brake, only the temporal progression of the measured current as the current increases being subjected to a comparison with the reference current. The current may be activated in pulses, with the comparison of the measured current and the reference current being restarted with each pulse.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: December 10, 2013
    Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbH
    Inventors: Henry Lehmann, Josef Datzreiter, Franz Daxecker, Peter Schlager
  • Patent number: 8033365
    Abstract: A magnetic rail brake device includes a brake magnet with a solenoid former supporting a solenoid. A horseshoe-shaped magnet core is disposed adjacent to the solenoid former. The horseshoe-shaped magnet core includes a yoke having cheeks that project away from the yoke. Pole shoes are formed at ends of the cheeks. The solenoid includes an upper part, with an upper height and an upper width, and a lower part, with a lower height and a lower width. The solenoid is disposed between the cheeks and engages vertically around the yoke. The upper height is less than the lower height, and the upper width is greater than the lower width. The upper and lower heights are measured parallel to a vertical center axis of the brake magnet, and the upper and lower widths are measured transversely with respect to the vertical center axis.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: October 11, 2011
    Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbH
    Inventors: Michael Kassan, Henry Lehmann
  • Publication number: 20110109326
    Abstract: Operative monitoring of track brakes involves passing an electric current through a winding of a brake magnet, measuring the electric current and comparing the temporal progression of the measured current with a saved temporal progression of a reference current. Comparison is achieved by calculating the difference between the measured current and the reference current. The difference between measured current and reference current may be temporally integrated and compared with a threshold value. To determine a magnetic coupling between track brake and track, a calculation may be made as to whether the measured current has local minima and/or local maxima during the activation of the track brake, only the temporal progression of the measured current as the current increases being subjected to a comparison with the reference current. The current may be activated in pulses, with the comparison of the measured current and the reference current being restarted with each pulse.
    Type: Application
    Filed: June 10, 2009
    Publication date: May 12, 2011
    Inventors: Henry Lehmann, Josef Datzreiter, Franz Dexecker, Peter Schlager
  • Patent number: 7866449
    Abstract: The invention relates to a magnetic rail brake device of a railway vehicle, including a magnetic base or carrier element, and a magnetic coil which can be connected to a voltage source by means of a connecting mechanism that is on the base or carrier element and is provided with at least two electrical terminals. An end face of the connecting mechanism is disposed within an imaginary enveloping area of the base or carrier element.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: January 11, 2011
    Assignee: Knorr-Bremse Systeme Für Schienenfahrzeuge GmbH
    Inventors: Henry Lehmann, Herrmann Koidl, Lothar Schmied, Richard Rathhammer, Stefan Haas
  • Patent number: 7806242
    Abstract: A magnetic rail brake device of a rail vehicle comprises at least one braking magnet including a magnet coil body having a plurality of magnetic elements held thereon, and which magnetic elements are movable. The device also comprises at least one fixing strip running parallel to a longitudinal length of the magnetic coil body and directly connected to the magnetic coil body to fix the braking magnet to other components of the magnetic rail brake device.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: October 5, 2010
    Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbH
    Inventors: Henry Lehmann, Hermann Koidl, Lothar Schmied, Richard Rathammer, Stefan Haas
  • Publication number: 20100116602
    Abstract: The invention relates to a magnetic rail brake device of a railway vehicle, including a magnetic base or carrier element, and a magnetic coil which can be connected to a voltage source by means of a connecting mechanism that is on the base or carrier element and is provided with at least two electrical terminals. An end face of the connecting mechanism is disposed within an imaginary enveloping area of the base or carrier element.
    Type: Application
    Filed: April 13, 2005
    Publication date: May 13, 2010
    Inventors: Henry Lehmann, Herrmann Koidl, Lothar Schmied, Richard Rathhammer, Stefan Haas
  • Publication number: 20100101898
    Abstract: A magnetic rail brake device includes a brake magnet with a solenoid former supporting a solenoid. A horseshoe-shaped magnet core is disposed adjacent to the solenoid former. The horseshoe-shaped magnet core includes a yoke having cheeks that project away from the yoke. Pole shoes are formed at ends of the cheeks. The solenoid includes an upper part, with an upper height and an upper width, and a lower part, with a lower height and a lower width. The solenoid is disposed between the cheeks and engages vertically around the yoke. The upper height is less than the lower height, and the upper width is greater than the lower width. The upper and lower heights are measured parallel to a vertical center axis of the brake magnet, and the upper and lower widths are measured transversely with respect to the vertical center axis.
    Type: Application
    Filed: March 20, 2008
    Publication date: April 29, 2010
    Inventors: Michael Kassan, Henry Lehmann
  • Publication number: 20070284199
    Abstract: A magnetic rail brake device of a rail vehicle comprises at least one braking magnet including a magnet coil body having a plurality of magnetic elements held thereon, and which magnetic elements are movable. The device also comprises at least one fixing strip running parallel to a longitudinal length of the magnetic coil body and directly connected to the magnetic coil body to fix the braking magnet to other components of the magnetic rail brake device.
    Type: Application
    Filed: April 13, 2005
    Publication date: December 13, 2007
    Inventors: Henry Lehmann, Hermann Koidl, Lothar Schmied, Richard Rathammer, Stefan Haas
  • Patent number: 6953107
    Abstract: The disclosure relates to a magnet track braking device comprising a magnetic base and/or support body and a pole shoe section containing a magnetic flow guiding area and a magnetic flow separating area. The disclosure is characterized in that the magnetic base and/or support body is made from materials having different magnetic characteristics, so that an increase in induction in the gap between the magnet track brake and the rail head is reduced when erosion occurs in the pole shoe section.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: October 11, 2005
    Assignee: Knorr-Bremse Systeme fur Schienenfahrzeuge GmbH
    Inventors: Henry Lehmann, Hermann Koidl
  • Publication number: 20040112691
    Abstract: The invention relates to a magnet track braking device (1) comprising a magnetic base and/or support body and a pole shoe section containing a magnetic flow guiding area and a magnetic flow separating area. The invention is characterised in that the magnetic base and or support body is made from materials having different magnetic characteristics, so that an increase in induction in the gap between the magnet track brake and the rail head (3) is prevented when erosion occurs in the pole shoe section.
    Type: Application
    Filed: January 15, 2004
    Publication date: June 17, 2004
    Inventors: Henry Lehmann, Hermann Koidl