Patents by Inventor Rolf Dohrmann

Rolf Dohrmann 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: 9133728
    Abstract: A fluid pressure reversing valve includes a housing, a coil carrier, a coil wound on the coil carrier, a bearing, an armature axially displaceable in the bearing, a core, a flux guiding device, a first connection bore, a control chamber, a first valve seat. A connection sleeve comprises a second connection bore, a first valve seat for a valve element of the armature, and a second valve seat for the valve element of the armature. The connection sleeve communicates with a fluid to be controlled. A third connection bore is connected with the control chamber. A valve element abuts against the first valve seat in a first position so as to form a connection between the first connection bore and the third connection bore, and against the second valve seat in a second position so as to form a connection between the third connection bore and the second connection bore.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: September 15, 2015
    Assignee: PIERBURG GMBH
    Inventors: Werner Buse, Rolf Lappan, Rolf Dohrmann, Franz-Josef Schnelker, Christoph Sadowski
  • Patent number: 9127780
    Abstract: A solenoid valve includes a housing within which is arranged a coil wound onto a coil former, an armature, a core, and a multiple-part return path arrangement, which together form an electromagnetic circuit. The armature is configured to be movable and to act at least indirectly on a valve closure element mounted in the coil former via a bearing. The multiple-part return-path arrangement comprises at least one return-path cover section, a return-path side section and a return-path inner section. The return-path inner section is arranged in the coil former.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: September 8, 2015
    Assignee: PIERBURG GMBH
    Inventors: Franz-Josef Schnelker, Werner Buse, Christoph Sadowski, Rolf Lappan, Rolf Dohrmann
  • Patent number: 9117577
    Abstract: A solenoid valve with an electromagnetic circuit includes a return plate, a yoke, a coil wound onto a coil carrier. The coil carrier includes an internal thread and comprises a dimensionally and temperature-stable material. A core includes an outer thread. The core is disposed in the coil carrier via a direct interlocking connection. The outer thread of the core is disposed within the internal thread of the coil carrier and is configured to provide adjustment for the core. An armature is configured to be movable and to act at least indirectly on a valve-closing element. The armature is supported in the coil carrier by a supporting device.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: August 25, 2015
    Assignee: PIERBURG GMBH
    Inventors: Janusz Zurke, Rolf Dohrmann
  • Patent number: 9062570
    Abstract: A pressure-control valve includes a housing, a coil carrier, a coil wound on the coil carrier, a first bearing, an armature comprising a valve member. The armature is configured to be axially displaced in the first bearing. A core. A flux guiding device. A connection sleeve comprises a valve seat for the valve member. A first connection bore is configured to be connected with a tank and with the connection sleeve. A second connection bore is configured to be connected with a consumer. An end of the connection sleeve distant from the core comprises a control bore with a control member supported therein. The armature and the control member are configured to be in a force-transmitting operative connection at least in an opening direction of the pressure-control valve.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: June 23, 2015
    Assignee: PIERBURG GMBH
    Inventors: Werner Buse, Franz-Josef Schnelker, Rolf Dohrmann, Christoph Sadowski
  • Publication number: 20150090912
    Abstract: A pressure control valve includes a housing with a lower part and an upper part. The housing includes a coil wound on a coil carrier, an armature configured to be axially displaceable within a bearing, a core, a flux guiding device, a connection bore, and a connector comprising a valve seat for the armature. The connector and the connection bore are disposed in the lower part of the housing. The upper part of the housing is arranged in a force-locked or a form-fitting manner. A bearing bushing for the armature is provided in a portion of the connector directed towards the core. A stop bushing for the armature is provided in an opposite portion of the connector.
    Type: Application
    Filed: December 9, 2014
    Publication date: April 2, 2015
    Inventors: WERNER BUSE, FRANZ-JOSEF SCHNELKER, ROLF DOHRMANN
  • Publication number: 20130302545
    Abstract: A workpiece part for a housing assembly for connecting two workpiece parts via a joining zone includes a laser beam-absorbing material, and at least one rib element arranged in the joining zone.
    Type: Application
    Filed: January 11, 2012
    Publication date: November 14, 2013
    Applicant: PIERBURG GmbH
    Inventors: Franz-Josef Schnelker, Werner Buse, Rolf Dohrmann, Alvito Fernandes
  • Publication number: 20130284961
    Abstract: A solenoid valve includes a housing within which is arranged a coil wound onto a coil former, an armature, a core, and a multiple-part return path arrangement, which together form an electromagnetic circuit. The armature is configured to be movable and to act at least indirectly on a valve closure element mounted in the coil former via a bearing. The multiple-part return-path arrangement comprises at least one return-path cover section, a return-path side section and a return-path inner section.
    Type: Application
    Filed: November 15, 2011
    Publication date: October 31, 2013
    Applicant: PIERBURG GMBH
    Inventors: Franz-Josef Schnelker, Werner Buse, Christoph Sadowski, Rolf Lappan, Rolf Dohrmann
  • Publication number: 20130284960
    Abstract: A solenoid valve includes a valve sleeve comprising a valve seat, a valve closure element which acts on the valve seat, and a housing. Arranged in the housing is a coil, an armature, a core, and a multiple-part return-path arrangement, which form an electromagnetic circuit. The core is arranged on a side of the housing opposite to the valve sleeve and is wound onto a coil former. The coil former comprises a first portion with an internal diameter and a receiving bushing for the valve sleeve arranged on a side opposite to the core. A movable armature acts on the valve closure element. The armature is mounted in the coil former via a bearing and comprises parts including a first part directed toward the core having a diameter. The diameter of the first part is larger than the internal diameter of the first portion of the coil former.
    Type: Application
    Filed: November 15, 2011
    Publication date: October 31, 2013
    Applicant: PIERBURG GMBH
    Inventors: Franz-Josef Schnelker, Werner Buse, Christoph Sadowski, Rolf Lappan, Rolf Dohrmann
  • Publication number: 20130264506
    Abstract: A solenoid valve includes a valve sleeve comprising a valve seat, a valve closure element which acts on the valve seat, and a housing. Within the housing is arranged a coil, a moveable armature, a core, and a multiple-part return-path arrangement, which together form an electromagnetic circuit. The core is arranged on a side of the housing opposite to the valve sleeve. The coil is wound onto a coil former. The coil former is formed as the valve sleeve and comprises a first portion with an inner diameter. The coil former is arranged on a side of the housing opposite to the core. The armature is mounted in the coil former via a bearing device and acts on the valve closure element. The armature comprises a first part directed towards the core having a diameter which is larger than the inner diameter of the first portion of the coil former.
    Type: Application
    Filed: November 15, 2011
    Publication date: October 10, 2013
    Inventors: Franz-Josef Schnelker, Werner Buse, Christoph Sadowski, Rolf Lappan, Rolf Dohrmann
  • Publication number: 20130264507
    Abstract: A solenoid valve includes a plug connection, at least one valve sleeve comprising at least one valve seat, at least one valve closure element which acts on the at least one valve seat, and a housing. Within the housing are arranged a core, a coil, an armature/plunger arrangement, and a multiple-part return-path arrangement, which together form an electromagnetic circuit. The coil is wound onto a coil former. The armature/plunger arrangement is movable and acts directly or indirectly on the at least one valve closure element. The armature/plunger arrangement is mounted in the coil former via a bearing and comprises at least one armature part and a plunger part. The plunger part is arranged in the valve sleeve and is moveable therein. The armature part is mounted in the coil former via the bearing. The armature part and the plunger part are connected to each other via the plug connection.
    Type: Application
    Filed: November 15, 2011
    Publication date: October 10, 2013
    Applicant: PIERBURG GMBH
    Inventors: Franz-Josef Schnelker, Werner Buse, Christoph Sadowski, Rolf Lappan, Rolf Dohrmann, Lukas Romanowski
  • Publication number: 20130112293
    Abstract: A pressure-control valve includes a housing, a coil carrier, a coil wound on the coil carrier, a first bearing, an armature comprising a valve member. The armature is configured to be axially displaced in the first bearing. A core. A flux guiding device. A connection sleeve comprises a valve seat for the valve member. A first connection bore is configured to be connected with a tank and with the connection sleeve. A second connection bore is configured to be connected with a consumer. An end of the connection sleeve distant from the core comprises a control bore with a control member supported therein.
    Type: Application
    Filed: May 24, 2011
    Publication date: May 9, 2013
    Applicant: PIERBURG GMBH
    Inventors: Werner Buse, Franz-Josef Schnelker, Rolf Dohrmann, Christoph Sadowski
  • Publication number: 20130099144
    Abstract: A fluid pressure reversing valve includes a housing, a coil carrier, a coil wound on the coil carrier, a bearing, an armature axially displaceable in the bearing, a core, a flux guiding device, a first connection bore, a control chamber, a first valve seat. A connection sleeve comprises a second connection bore, a first valve seat for a valve element of the armature, and a second valve seat for the valve element of the armature. The connection sleeve communicates with a fluid to be controlled. A third connection bore is connected with the control chamber. A valve element abuts against the first valve seat in a first position so as to form a connection between the first connection bore and the third connection bore, and against the second valve seat in a second position so as to form a connection between the third connection bore and the second connection bore.
    Type: Application
    Filed: May 27, 2011
    Publication date: April 25, 2013
    Applicant: PIERBURG GMBH
    Inventors: Werner Buse, Rolf Lappan, Rolf Dohrmann, Franz-Josef Schnelker, Christoph Sadowski
  • Publication number: 20120242437
    Abstract: An electromagnet drive for a valve includes a piston element. A housing comprises an electromagnetic circuit, a coil wound onto a coil former, an armature mounted to move between a first and second end position to act on the piston element, a core, and a magnetisable return device. The core and/or the magnetisable return device comprises an adjusting bore. The core or the magnetisable return device comprises a substantially circumferential cutout in a region of the adjusting bore on a side facing the coil. A fixing device fixes the armature in a non-energized state. An adjusting device adjusts a magnetic force. The adjusting device comprises an adjusting screw which influences a profile of magnetic field lines. The adjusting screw is insertable into the adjusting bore of the core or the magnetisable return device in a direction of the armature. Energizing the coil moves the armature into the first or second end position.
    Type: Application
    Filed: November 5, 2010
    Publication date: September 27, 2012
    Applicant: PIERBURG GMBH
    Inventors: Werner Buse, Franz-Josef Schnelker, Rolf Dohrmann
  • Publication number: 20110226975
    Abstract: A pressure control valve includes a housing with a lower part and an upper part. The housing includes a coil wound on a coil carrier, an armature configured to be axially displaceable within a bearing, a core, a flux guiding device, a connection bore, and a connector comprising a valve seat for the armature. The connector and the connection bore are disposed in the lower part of the housing. The upper part of the housing is arranged in a force-locked or a form-fitting manner. A bearing bushing for the armature is provided in a portion of the connector directed towards the core. A stop bushing for the armature is provided in an opposite portion of the connector.
    Type: Application
    Filed: October 7, 2009
    Publication date: September 22, 2011
    Applicant: PIERBURG GMBH
    Inventors: Werner Buse, Franz-Josef Schnelker, Rolf Dohrmann
  • Patent number: 8001952
    Abstract: An electropneumatic converter for connection with an exhaust recirculation valve in a motor vehicle. The electropneumatic converter includes a vacuum port and an atmospheric pressure port configured to connect with a valve chamber using a valve device, wherein a mixed pressure is formed in the valve chamber and supplied to a mixed pressure port. An armature is affixed to a valve body of the valve device movable in an axial direction, the valve body being connected to a suspension device, wherein the armature is displaceable in the axial direction using a solenoid. The electropneumatic converter also includes a damping element configured to dampen the axial movement of the armature and the valve device affixed thereto. The damping element includes at least one of an elastomer or a foamed material.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: August 23, 2011
    Assignee: Pierburg GmbH
    Inventors: Rolf Dohrmann, Janusz Zurke, Alvito Fernandes
  • Publication number: 20110037006
    Abstract: A solenoid valve with an electromagnetic circuit includes a return plate, a yoke, a coil wound onto a coil carrier. The coil carrier includes an internal thread and comprises a dimensionally and temperature-stable material. A core includes an outer thread. The core is disposed in the coil carrier via a direct interlocking connection. The outer thread of the core is disposed within the internal thread of the coil carrier and is configured to provide adjustment for the core. An armature is configured to be movable and to act at least indirectly on a valve-closing element. The armature is supported in the coil carrier by a supporting device.
    Type: Application
    Filed: February 16, 2009
    Publication date: February 17, 2011
    Applicant: PIERBURG GMBH
    Inventors: Janusz Zurke, Rolf Dohrmann
  • Publication number: 20100163007
    Abstract: An electropneumatic converter for connection with an exhaust recirculation valve in a motor vehicle. The electropneumatic converter includes a vacuum port and an atmospheric pressure port configured to connect with a valve chamber using a valve device, wherein a mixed pressure is formed in the valve chamber and supplied to a mixed pressure port. An armature is affixed to a valve body of the valve device movable in an axial direction, the valve body being connected to a suspension device, wherein the armature is displaceable in the axial direction using a solenoid. The electropneumatic converter also includes a damping element configured to dampen the axial movement of the armature and the valve device affixed thereto. The damping element includes at least one of an elastomer or a foamed material.
    Type: Application
    Filed: August 2, 2007
    Publication date: July 1, 2010
    Inventors: Rolf Dohrmann, Janusz Zurke, Alvito Fernandes
  • Patent number: 6734358
    Abstract: A holder for electro-pneumatic components for vehicles provides for a base plate with fastening elements for fastening the holder in the vehicle. Holding elements for releasable holding the electro-pneumatic components are connected to the base plate. The fixing elements each have two holding arms designed as click-in elements. Further, a fixing element in the form of a small elastic plate, such as a rubber disc, is provided. The fixing element presses the electro-pneumatic component against an abutment for a vibration-resistant fixation.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: May 11, 2004
    Assignee: Pierburg, GmbH
    Inventors: Albert Denne, Rolf Dohrmann, Janust Zurke
  • Publication number: 20030102144
    Abstract: A holder for electro-pneumatic components for vehicles comprises a base plate with fastening elements for fastening the holder in the vehicle. Holding elements for releasably holding the electro-pneumatic components are connected to the base plate. The fixing elements each have two holding arms designed as click-in elements. Further, a fixing element in the form of a small elastic plate, such as a rubber disc, is provided. The fixing element presses the electro-pneumatic component against an abutment for a vibration-resistant fixation.
    Type: Application
    Filed: November 22, 2002
    Publication date: June 5, 2003
    Applicant: Pierburg GmbH
    Inventors: Albert Denne, Rolf Dohrmann, Janust Zurke
  • Patent number: 4318070
    Abstract: An actuator for use as part of an electrically heated thermal delay valve (FIG. 1) or switch (FIG. 2) includes a thermally responsive plate (12) the periphery of which is fixed and the central part of which forms a temperature-dependent control element. The actuator also includes a metal carrier plate (9) which has a PTC element (10) mounted on it and which is free to move in a direction normal to its surface between stop abutments, and at least one spring (11) which electrically contacts the PTC element (10) and biases the carrier plate (9) towards the thermally responsive plate (9) to ensure that it is constantly in thermal contact with the carrier plate (10). This ensures that a direct thermal contact between the PTC element and the thermally responsive plate is constantly maintained which results in consistently reproducible functions being achieved with the apparatus by virtue of this direct thermal contact. The thermally responsive plate (9) may be biased towards the carrier plate (10).
    Type: Grant
    Filed: January 3, 1980
    Date of Patent: March 2, 1982
    Assignee: Pierburg GmbH & Co. KG
    Inventors: Rolf Dohrmann, Ulrich Henke, Wojciech Marusiak