Patents by Inventor Detlef Hartmann
Detlef Hartmann 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).
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Patent number: 10008832Abstract: A spark plug electrode having greater mechanical stability. The spark plug electrode includes a base body and a noble metal pin situated on the base body, the base body and the noble metal pin being connected to each other by a connection zone. The connection zone has at least one first welding seam and one second welding seam.Type: GrantFiled: October 1, 2015Date of Patent: June 26, 2018Assignee: ROBERT BOSCH GMBHInventors: Dennis Quest, Detlef Hartmann, Dominic Lang, Guido Hannich, Stefan Nufer
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Publication number: 20170331260Abstract: A spark plug electrode having greater mechanical stability. The spark plug electrode includes a base body and a noble metal pin situated on the base body, the base body and the noble metal pin being connected to each other by a connection zone. The connection zone has at least one first welding seam and one second welding seam.Type: ApplicationFiled: October 1, 2015Publication date: November 16, 2017Inventors: Dennis Quest, Detlef Hartmann, Dominic Lang, Guido Hannich, Stefan Nufer
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Patent number: 9608412Abstract: A spark plug, including a central electrode, a first ground electrode, which is situated in a curved shape having a horizontal area and an essentially vertical area, and at least one second ground electrode, which is situated adjacent to the central electrode in such a way that a distance between the first ground electrode and the central electrode is less than a distance between the second ground electrode and the central electrode.Type: GrantFiled: June 3, 2014Date of Patent: March 28, 2017Assignee: ROBERT BOSCH GMBHInventors: Detlef Hartmann, Andreas Benz, Mario Fleischhauer, Jochen Fischer
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Patent number: 9391429Abstract: A spark plug for an internal combustion engine, including: a center electrode having a first noble metal pin of a first diameter mounted thereon, and a ground electrode having a second noble metal pin of a second diameter mounted thereon, the noble metal pins of the center electrode and of the ground electrode being mutually opposed at the end faces thereof; and the first diameter of the first noble metal pin of the center electrode being larger than the second diameter of the second noble metal pin of the ground electrode.Type: GrantFiled: August 3, 2012Date of Patent: July 12, 2016Assignee: ROBERT BOSCH GMBHInventors: Detlef Hartmann, Dietrich Trachte
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Patent number: 9059571Abstract: A spark plug includes: a center electrode, a ground electrode, which is side-mounted on the center electrode, and a noble metal insert, which is situated on the center electrode. The noble metal insert is situated in a cutout provided in a base material of the center electrode and connected in a continuous material to the base material of the center electrode. The noble metal insert is directed with one surface towards the side-mounted ground electrode.Type: GrantFiled: August 2, 2012Date of Patent: June 16, 2015Assignee: ROBERT BOSCH GMBHInventors: Detlef Hartmann, Andreas Benz
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Publication number: 20140320010Abstract: A spark plug for an internal combustion engine, including: a center electrode having a first noble metal pin of a first diameter mounted thereon, and a ground electrode having a second noble metal pin of a second diameter mounted thereon, the noble metal pins of the center electrode and of the ground electrode being mutually opposed at the end faces thereof; and the first diameter of the first noble metal pin of the center electrode being larger than the second diameter of the second noble metal pin of the ground electrode.Type: ApplicationFiled: August 3, 2012Publication date: October 30, 2014Inventors: Detlef Hartmann, Dietrich Trachte
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Publication number: 20140292178Abstract: A spark plug includes: a center electrode, a ground electrode, which is side-mounted on the center electrode, and a noble metal insert, which is situated on the center electrode. The noble metal insert is situated in a cutout provided in a base material of the center electrode and connected in a continuous material to the base material of the center electrode. The noble metal insert is directed with one surface towards the side-mounted ground electrode.Type: ApplicationFiled: August 2, 2012Publication date: October 2, 2014Inventors: Detlef Hartmann, Andreas Benz
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Publication number: 20140285083Abstract: A spark plug, including a central electrode, a first ground electrode, which is situated in a curved shape having a horizontal area and an essentially vertical area, and at least one second ground electrode, which is situated adjacent to the central electrode in such a way that a distance between the first ground electrode and the central electrode is less than a distance between the second ground electrode and the central electrode.Type: ApplicationFiled: June 3, 2014Publication date: September 25, 2014Applicant: ROBERT BOSCH GMBHInventors: Detlef HARTMANN, Andreas BENZ, Mario FLEISCHHAUER, Jochen FISCHER
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Patent number: 8558440Abstract: A method is described for applying a pin made of a spark-erosion-resistant material, in particular of noble metal, onto a electrode base element. In order to achieve a large pin surface exposed to spark erosion, without increased material outlay for the pin, the pin is placed with one end surface onto the electrode base element and welded to it. The welded-on pin is then, by application of a compressive force engaging at the exposed end surface of the pin and directed toward the electrode base element, upset to a larger diameter.Type: GrantFiled: July 27, 2007Date of Patent: October 15, 2013Assignee: Robert Bosch GmbHInventors: Detlef Hartmann, Andreas Benz
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Patent number: 8317560Abstract: A method for producing a spark plug is provided, which includes a ground electrode fixed to a housing, and a center electrode insulated electrically from the housing by an insulator, the ground electrode having a ground electrode base and a ground electrode section, which ground electrode section including an electrode base and a noble metal section. In order to produce the spark plug, the ground electrode base is connected to the ground electrode section, in which, in a first step, the electrode base is connected to the noble metal section to form the ground electrode section, and in a second step, the ground electrode section is connected to the ground electrode base.Type: GrantFiled: January 3, 2011Date of Patent: November 27, 2012Assignee: Robert Bosch GmbHInventors: Detlef Hartmann, Jochen Fischer
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Publication number: 20120104926Abstract: A spark plug, especially for a stationary internal combustion engine, is described that includes a ground electrode and a center electrode, the center electrode including an inner area, an outer ring and at least two crosspieces, in which the at least two crosspieces connect the inner area to the outer ring.Type: ApplicationFiled: September 8, 2009Publication date: May 3, 2012Inventors: Detlef Hartmann, Hermann Kersting, Lars Menken, Dirk Scholz, Mario Fleischhauer, Karl Linhardt, Christian Wenzl
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Patent number: 8167673Abstract: A method for manufacturing a spark plug having a central electrode and a ground electrode, the central electrode and the ground electrode being spaced apart from each other and a first planar electrode face being formed on the central electrode and a second planar electrode face being formed on the ground electrode by a separative manufacturing method.Type: GrantFiled: August 1, 2008Date of Patent: May 1, 2012Assignee: Robert Bosch GmbHInventors: Detlef Hartmann, Jochen Fischer
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Publication number: 20110177744Abstract: A method for producing a spark plug is provided, which includes a ground electrode fixed to a housing, and a center electrode insulated electrically from the housing by an insulator, the ground electrode having a ground electrode base and a ground electrode section, which ground electrode section including an electrode base and a noble metal section. In order to produce the spark plug, the ground electrode base is connected to the ground electrode section, in which, in a first step, the electrode base is connected to the noble metal section to form the ground electrode section, and in a second step, the ground electrode section is connected to the ground electrode base.Type: ApplicationFiled: January 3, 2011Publication date: July 21, 2011Inventors: Detlef Hartmann, Jochen Fischer
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Patent number: 7977856Abstract: A spark plug for an internal combustion engine includes a ground electrode, a center electrode, an insulator, a housing, and a folded packing which is situated on an outer circumference of the housing. The folded packing has: a hollow profile in cross section; a free leg directed outwards; and a support region. The folded packing lies on a contact surface in a support region, and the free leg is situated at an angle to the support region. The folded packing is pressed together during the mounting of the spark plug, and the free leg of the folded packing is designed to bend over in the direction of the support surface during the mounting to provide a diameter enlargement of the folded packing.Type: GrantFiled: June 11, 2009Date of Patent: July 12, 2011Assignee: Robert Bosch GmbHInventors: Detlef Hartmann, Christoph Naumann, Mario Fleischhauer, Jochen Fischer
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Publication number: 20100320894Abstract: A spark plug, including a central electrode, a first ground electrode, which is situated in a curved shape having a horizontal area and an essentially vertical area, and at least one second ground electrode, which is situated adjacent to the central electrode in such a way that a distance between the first ground electrode and the central electrode is less than a distance between the second ground electrode and the central electrode.Type: ApplicationFiled: October 10, 2008Publication date: December 23, 2010Inventors: Detlef Hartmann, Andreas Benz, Mario Fleischhauer, Jochen Fischer
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Publication number: 20100007261Abstract: A spark plug for an internal combustion engine includes a ground electrode, a center electrode, an insulator, a housing, and a folded packing which is situated on an outer circumference of the housing. The folded packing has: a hollow profile in cross section; a free leg directed outwards; and a support region. The folded packing lies on a contact surface in a support region, and the free leg is situated at an angle to the support region. The folded packing is pressed together during the mounting of the spark plug, and the free leg of the folded packing is designed to bend over in the direction of the support surface during the mounting to provide a diameter enlargement of the folded packing.Type: ApplicationFiled: June 11, 2009Publication date: January 14, 2010Inventors: Detlef Hartmann, Christoph Naumann, Mario Fleischhauer, Jochen Fischer
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Publication number: 20090309476Abstract: A method is described for applying a pin made of a spark-erosion-resistant material, in particular of noble metal, onto a electrode base element. In order to achieve a large pin surface exposed to spark erosion, without increased material outlay for the pin, the pin is placed with one end surface onto the electrode base element and welded to it. The welded-on pin is then, by application of a compressive force engaging at the exposed end surface of the pin and directed toward the electrode base element, upset to a larger diameter.Type: ApplicationFiled: July 27, 2007Publication date: December 17, 2009Inventors: Detlef Hartmann, Andreas Benz
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Publication number: 20090066211Abstract: A method for manufacturing a spark plug having a central electrode and a ground electrode, the central electrode and the ground electrode being spaced apart from each other and a first planar electrode face being formed on the central electrode and a second planar electrode face being formed on the ground electrode by a separative manufacturing method.Type: ApplicationFiled: August 1, 2008Publication date: March 12, 2009Inventors: Detlef Hartmann, Jochen Fischer
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Patent number: 6630771Abstract: A spark plug electrode having a welded-on noble-metal part for a longer service life of the spark plug. Prior to the welding process, the noble-metal part is provided with a profiling on the side facing the spark plug electrode.Type: GrantFiled: February 23, 2001Date of Patent: October 7, 2003Assignee: Robert Bosch GmbHInventors: Heinz Ulm, Rainer Kocik, Stephan Weigel, Jochen Fischer, Peter Metzler, Detlef Hartmann
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Publication number: 20020012429Abstract: A method for reducing echo signals in telecommunications systems for the transmission of wanted acoustic signals, particularly human speech, in which the presence of echo signals is detected and/or predicted and the detected and/or predicted echo signals are subsequently suppressed or reduced is characterized in that the power value of the noise level N in the currently used telecommunications channel is continuously measured and/or estimated, and that the degree of reduction of the echo signals to be currently effected is set continuously and automatically, in dependence on the current noise level N, according to a predefined function h(N).Type: ApplicationFiled: June 15, 2001Publication date: January 31, 2002Applicant: ALCATELInventors: Hans Jurgen Matt, Detlef Hartmann, Fritz Weinschenk, Michael Walker