Patents by Inventor Oswald Friedmann
Oswald Friedmann 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: 5984789Abstract: A torsion damping assembly which is installed between the crankshaft of the engine and the input element of the change-speed transmission in a motor vehicle has two coaxial flywheels one of which is driven by the crankshaft and the other of which can transmit torque to the transmission in response to engagement of a friction clutch. The transmission of torque between the two flywheels takes place by way of a damper and a slip clutch which latter is effective only within a selected range of possible angular movements of the two flywheels relative to each other.Type: GrantFiled: November 26, 1997Date of Patent: November 16, 1999Assignee: LuK Lamellen und Kupplungsbau GmbHInventors: Wolfgang Reik, Oswald Friedmann
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Patent number: 5980387Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input member of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.Type: GrantFiled: August 5, 1997Date of Patent: November 9, 1999Assignee: LuK Lamellen und Kupplungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5980386Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input member of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.Type: GrantFiled: July 23, 1997Date of Patent: November 9, 1999Assignee: Luk Lamellen und Kupplungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5971857Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input member of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.Type: GrantFiled: May 14, 1997Date of Patent: October 26, 1999Assignee: LuK Lamellen und Kupplungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5879253Abstract: A hydromechanical torque sensor having several plenum chambers can be utilized to transmit torque between the driving and driven parts in the power train of a motor vehicle as well as to make necessary adjustments in a hydraulically adjustable transmission. To this end, the plenum chambers of the torque sensor can be connected to or sealed from each other. The torque sensor and the transmission can receive fluid from discrete sources or from a single source by way of suitable valves.Type: GrantFiled: November 26, 1997Date of Patent: March 9, 1999Assignee: Luk Getrieb-Systeme GmbHInventors: Oswald Friedmann, Armin Veil
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Patent number: 5873785Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input member of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.Type: GrantFiled: October 10, 1995Date of Patent: February 23, 1999Assignee: Luk Lamellen und Kupplungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5871401Abstract: A torsion damping apparatus which is installed between the crankshaft of the engine and the friction clutch in a motor vehicle has two coaxial flywheels which are rotatable relative to each other against the opposition of a composite damper. The composite damper has two dampers which operate in series and a friction generating device which operates between one of the dampers and one of the flywheels. One of the flywheels has an axial projection which centers a flange of the composite damper.Type: GrantFiled: June 7, 1995Date of Patent: February 16, 1999Assignee: LuK Lamellen und Kupplungsbau GmbHInventors: Paul Maucher, Oswald Friedmann
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Patent number: 5863252Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input member of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.Type: GrantFiled: July 30, 1997Date of Patent: January 26, 1999Assignee: LuK Lamellen und Kupplaungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5860863Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input member of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.Type: GrantFiled: August 1, 1997Date of Patent: January 19, 1999Assignee: LuK Lamellen und Kupplaungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5842922Abstract: A torsion damping assembly which is installed between the crankshaft of the engine and the input element of the change-speed transmission in a motor vehicle has two coaxial flywheels one of which is driven by the crankshaft and the other of which can transmit torque to the transmission in response to engagement of a friction clutch. The transmission of torque between the two flywheels takes place by way of a damper and a slip clutch which latter is effective only within a selected range of possible angular movements of the two flywheels relative to each other.Type: GrantFiled: November 26, 1997Date of Patent: December 1, 1998Assignee: Luk Lamellen und Kupplungsbau GmbHInventors: Wolfgang Reik, Oswald Friedmann
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Patent number: 5759106Abstract: A torsion damping assembly which is installed between the crankshaft of the engine and the input element of the change-speed transmission in a motor vehicle has two coaxial flywheels one of which is driven by the crankshaft and the other of which can transmit torque to the transmission in response to engagement of a friction clutch. The transmission of torque between the two flywheels takes place by way of a damper and a slip clutch which latter is effective only within a selected range of possible angular movements of the two flywheels relative to each other.Type: GrantFiled: September 27, 1994Date of Patent: June 2, 1998Assignee: Luk Lamellen und Kupplungsbau GmbHInventors: Wolfgang Reik, Oswald Friedmann
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Patent number: 5725447Abstract: A torque transmitting power train for use in a motor vehicle employs a transmission with two adjustable pulleys and an endless flexible element trained over the pulleys. The pulleys are adjustable by a torque sensor and primary hydraulic adjusting units in dependency upon the magnitude of transmitted torque, as well as by an adjustable selecting valve and secondary hydraulic adjusting units in dependency upon the desired or required transmission ratio. The primary and secondary adjusting units can receive a pressurized hydraulic fluid from a common source.Type: GrantFiled: December 14, 1995Date of Patent: March 10, 1998Assignee: LuK Getriebe-Systeme GmbHInventors: Oswald Friedmann, Urban Panther, Ivo Agner
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Patent number: 5667448Abstract: A power train for use in motor vehicles has an infinitely variable transmission with two adjustable sheaves, an endless flexible torque transmitting element trained over the sheaves, and at least one hydraulic adjusting unit for each of the sheaves. The adjusting units receive pressurized fluid from a pump and the pressure of such fluid, and hence the extent of frictional clamping engagement between the sheaves and the flexible element, is regulated by a torque sensor including a plenum chamber with an outlet having an effective cross-sectional area which is variable in dependency upon variations of torque being applied to the torque sensor by the engine of the vehicle. The energy of fluid leaving the plenum chamber is used to operate a jet pump which draws fluid from a source for lubrication and/or cooling of the transmission and/or one or more clutches forming part of the power train.Type: GrantFiled: December 14, 1995Date of Patent: September 16, 1997Assignee: LuK Getriebe-Systeme GmbHInventor: Oswald Friedmann
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Patent number: 5575364Abstract: An apparatus which serves to transmit force between the crankshaft of an internal combustion engine and the input shaft of a variable-speed transmission in a motor vehicle has a hydraulic clutch with one or more pumps, stators and turbines. The casing of the hydraulic clutch is driven by the crankshaft, and the turbine(s) drives or drive a hub which transmits torque to the input shaft. One or more elastic dampers are installed in the casing to permit pronounced angular movements (within preselected limits) of the casing and the hub relative to each other. Each damper comprises energy storing elements, e.g., arcuate coil springs, acting at least in the circumferential direction of the casing. A lock-up clutch can be installed in the casing in series with the damper or dampers.Type: GrantFiled: August 8, 1994Date of Patent: November 19, 1996Assignee: Luk Lamellen Und Kupplungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5538481Abstract: A power train between the engine and the wheels of a motor vehicle has a start-up component which receives torque from the engine and transmits torque to an infinitely variable transmission through a reversible torque transmitting apparatus. The transmitting apparatus comprises at least one planetary transmission, a first clutch which can be engaged to transmit torque from the start-up component and the planet wheel carrier of the planetary transmission to an input/output element, and a second clutch which can be engaged, when the first clutch is disengaged, to connect the internal wheel of the planetary transmission to a housing for the planetary transmission. The first clutch is mounted, at least in part, on the planet wheel carrier and the second clutch is mounted, at least in part, on the internal wheel of the planetary transmission.Type: GrantFiled: March 9, 1994Date of Patent: July 23, 1996Assignee: LuK Getriebe-Systeme GmbHInventor: Oswald Friedmann
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Patent number: 5487704Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input member of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.Type: GrantFiled: May 7, 1993Date of Patent: January 30, 1996Assignee: LUK Lamellen und Kupplungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5456634Abstract: A torsion damping apparatus which is installed between the crankshaft of the engine and the friction clutch in a motor vehicle has two coaxial flywheels which are rotatable relative to each other against the opposition of a composite damper. The composite damper has two dampers which operate in series and a friction generating device which operates between one of the dampers and one of the flywheels. One of the flywheels has an axial projection which centers a flange of the composite damper.Type: GrantFiled: December 6, 1993Date of Patent: October 10, 1995Assignee: LuK Lamellen und Kupplungsbau GmbHInventors: Paul Maucher, Oswald Friedmann
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Patent number: 5415261Abstract: Apparatus for transmitting torque from the engine to the variable-speed transmission of a motor vehicle has a primary flywheel which is connectable to the crankshaft of an engine, a secondary flywheel which is coaxial with and is rotatable relative to the primary flywheel against the opposition of one or more dampers and is connectable to the input shaft of a transmission by the clutch plate of a friction clutch having a cover which is permanently separably affixed to the secondary flywheel. An antifriction bearing between the two flywheels is located at least in part radially inwardly of fasteners which extend through holes in the first flywheel to separably connect the first flywheel to the crankshaft. At least one race of the at least one bearing is or can be integral with one of the flywheels.Type: GrantFiled: November 16, 1993Date of Patent: May 16, 1995Assignee: Luk Lamellen und Kupplungsbau GmbHInventor: Oswald Friedmann
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Patent number: 5382193Abstract: Apparatus for damping vibrations between the output element of the engine and the power train in a motor vehicle has flywheels which are rotatable relative to each other. One flywheel is mounted on the output element of the engine and another flywheel is connectable to the power train by a friction clutch. Vibration dampers are installed between the flywheels, and such dampers are confined in a housing which is provided on the one flywheel and contains a supply of viscous fluid medium for the parts of the dampers. The housing is the input member of the dampers and the output member of the dampers is a flange which extends into the housing and is axially movably coupled to the other flywheel.Type: GrantFiled: September 28, 1993Date of Patent: January 17, 1995Assignee: Luk Lamellen Und Kupplungsbau GmbHInventors: Oswald Friedmann, Johann Jackel
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Patent number: 5377796Abstract: An apparatus which serves to transmit force between the crankshaft of an internal combustion engine and the input shaft of a variable-speed transmission in a motor vehicle has a hydraulic clutch with one or more pumps, stators and turbines. The casing of the hydraulic clutch is driven by the crankshaft, and the turbine(s) drives or drive a hub which transmits torque to the input shaft. One or more elastic dampers are installed in the casing to permit pronounced angular movements (within preselected limits) of the casing and the hub relative to each other. Each damper comprises energy storing elements, e.g., arcuate coil springs, acting at least in the circumferential direction of the casing. A lock-up clutch can be installed in the casing in series with the damper or dampers.Type: GrantFiled: May 1, 1992Date of Patent: January 3, 1995Assignee: Luk Lamellen und Kupplungsbau GmbHInventors: Oswald Friedmann, Johann Jackel