Patents by Inventor Dirk Burkhart
Dirk Burkhart 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: 8381889Abstract: A dual clutch, which has a first friction clutch pulled by a first lever actuator and a second friction clutch pushed by a second lever actuator. The lever actuators each have a lever that is spring-loaded on one side and lever tips which are moved by a bearing block. The bearing block can be moved radially with along a profile of the lever to set a variable contact point of the lever between a rigid base plate and the lever to act on actuating bearings of the friction clutches. The bearing block is actuated by force application in one of the radial directions of motion by a drive controlled by a control unit in an automated manner. The drive of both lever actuators is formed by a pneumatic controller. In each drive a piston is movable in a housing and is connected to the bearing block by a piston rod.Type: GrantFiled: January 6, 2012Date of Patent: February 26, 2013Assignee: Schaeffler Technologies AG & Co. KGInventor: Dirk Burkhart
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Publication number: 20120175213Abstract: A dual clutch, which has a first friction clutch pulled by a first lever actuator and a second friction clutch pushed by a second lever actuator. The lever actuators each have a lever that is spring-loaded on one side and lever tips which are moved by a bearing block. The bearing block can be moved radially with along a profile of the lever to set a variable contact point of the lever between a rigid base plate and the lever to act on actuating hearings of the friction clutches. The bearing block is actuated by force application in one of the radial directions of motion by a drive controlled by a control unit in an automated manner. The drive of both lever actuators is formed by a pneumatic controller. In each drive a piston is movable in a housing and is connected to the bearing block by a piston rod.Type: ApplicationFiled: January 6, 2012Publication date: July 12, 2012Applicant: Schaeffler Technologies AG & Co. KGInventor: Dirk BURKHART
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Patent number: 8201679Abstract: An actively closed friction clutch actuated by a lever actuator and having an adjusting means, the lever actuator taking the form of a roller displaced radially by a spindle, which roller acts on a unilaterally suspended lever, the latter being displaced axially and acting axially on a clamping means such as a lever, lever spring or diaphragm spring. The adjusting means for compensating friction lining wear is enabled by an end stop position widened axially relative to a stop position of the lever, which end stop position is enabled by means of an engageable/disengageable stop. To distinguish the two stop positions, the force/travel characteristic line of the lever actuator is detected by the controller of the lever actuator.Type: GrantFiled: March 5, 2009Date of Patent: June 19, 2012Assignee: Schaeffler Technologies AG & Co. KGInventors: Dirk Burkhart, Alexander Dreher
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Patent number: 8100812Abstract: The invention relates to a process for controlling an automated friction clutch with a wear adjustment device that adjusts extended clutch stroke by a discrete magnitude through the wear of friction lining at maximum transmittable torque of the friction clutch. To guarantee safe self-adjustment, also during a long operation period under the maximum clutch torque, under specified preconditions, for instance, during the start of the internal combustion engine and without gear engagement, the friction clutch is closed for maximum clutch torque.Type: GrantFiled: April 3, 2009Date of Patent: January 24, 2012Assignee: Schaeffler Technologies GmbH & Co. KGInventors: Laszlo Man, Alexander Dreher, Dirk Burkhart
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Publication number: 20090258757Abstract: The invention relates to a process for controlling an automated friction clutch with a wear adjustment device that adjusts extended clutch stroke by a discrete magnitude through the wear of friction lining at maximum transmittable torque of the friction clutch. To guarantee safe self-adjustment, also during a long operation period under the maximum clutch torque, under specified preconditions, for instance, during the start of the internal combustion engine and without gear engagement, the friction clutch is closed for maximum clutch torque.Type: ApplicationFiled: April 3, 2009Publication date: October 15, 2009Applicant: LUK LAMELLEN UND KUPPLUNGSBAU BETEILIGUNGS KGInventors: Laszlo Man, Alexander Dreher, Dirk Burkhart
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Publication number: 20090223772Abstract: An actively closed friction clutch actuated by a lever actuator and having an adjusting means, the lever actuator taking the form of a roller displaced radially by a spindle, which roller acts on a unilaterally suspended lever, the latter being displaced axially and acting axially on a clamping means such as a lever, lever spring or diaphragm spring. The adjusting means for compensating friction lining wear is enabled by an end stop position widened axially relative to a stop position of the lever, which end stop position is enabled by means of an engageable/disengageable stop. To distinguish the two stop positions, the force/travel characteristic line of the lever actuator is detected by the controller of the lever actuator.Type: ApplicationFiled: March 5, 2009Publication date: September 10, 2009Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KGInventors: Dirk Burkhart, Alexander Dreher
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Patent number: 7124871Abstract: A lever system for actuating a clutch or a brake for a vehicle, such as a motor vehicle. The actuating force for the clutch or transmission brake is changeable by displacing a fulcrum with respect to a lever. An energy storage mechanism may act at one end portion of the lever and a pressure plate of a clutch or a transmission brake may act, directly or indirectly, on the other end portion.Type: GrantFiled: March 3, 2004Date of Patent: October 24, 2006Assignee: Luk Lamellen und Kupplungsbau Beteiligungs KGInventors: Oswald Friedmann, Wolfgang Reik, Dirk Burkhart, Wolfgang Haas, Christian Scheufler, Laszlo Man, Christoph Raber, Dirk Reimnitz, Markus Schaefer
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Publication number: 20040173429Abstract: A lever system for actuating a clutch or a brake for a vehicle, such as a motor vehicle. The actuating force for the clutch or transmission brake is changeable by displacing a fulcrum with respect to a lever. An energy storage mechanism may act at one end portion of the lever and a pressure plate of a clutch or a transmission brake may act, directly or indirectly, on the other end portion.Type: ApplicationFiled: March 3, 2004Publication date: September 9, 2004Applicant: LUK LAMELLEN UND KUPPLUNGSBAU BETEILIGUNGS KGInventors: Oswald Friedmann, Wolfgang Reik, Dirk Burkhart, Wolfgang Haas, Christian Scheufler, Laszlo Man, Christoph Raber, Dirk Reimnitz, Markus Schaefer