Patents by Inventor Andrew K. Rekow
Andrew K. Rekow 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: 11065950Abstract: A method of shifting ranges within a transmission is provided. The method of an embodiment includes determining an intention to change from a first mode to a second mode in the transmission, determining the first mode of the transmission, which includes a first range clutch in an engaged condition and a first synchronizer in a first engaged condition, determining the second mode of the transmission, which includes a second range clutch in an engaged condition and a second synchronizer in a first engaged condition, engaging the second synchronizer in the first engaged condition, disengaging the first range clutch, engaging the second range clutch, and disengaging the first synchronizer from the first engaged condition.Type: GrantFiled: August 27, 2018Date of Patent: July 20, 2021Assignee: DEERE & COMPANYInventors: David Mueller, Andrew K. Rekow, Thomas H. Vu, Rainer Gugel, Werner Stettler
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Patent number: 11054008Abstract: A range-shift transmission has a range input shaft, on which gear wheels of gear pairs of at least two range groups are arranged coaxially. The range input shaft is drivingly connected to a range output shaft via a gearwheel pair of a range group. The range-shift transmission has a second input shaft arranged coaxially and rotatably relative to the range input shaft.Type: GrantFiled: February 16, 2018Date of Patent: July 6, 2021Assignee: DEERE & COMPANYInventors: David Mueller, Rainer Gugel, Andrew K. Rekow
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Patent number: 10670124Abstract: An infinitely variable transmission (IVT) provides a plurality of transmission modes. At least one mode is a serial mode and at least one other mode is a split-path mode. The serial mode may provide a powered zero and creeper ground speeds. The split-path mode(s) may provide higher field speeds.Type: GrantFiled: January 25, 2018Date of Patent: June 2, 2020Assignee: DEERE & COMPANYInventors: Andrew K. Rekow, Rainer Gugel, David Mueller, Thomas G. Ore, Dennis L. Jeffries
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Patent number: 10655710Abstract: An infinitely variable transmission (IVT) provides a plurality of transmission modes. At least one mode is a serial mode and at least one other mode is a split-path mode. The IVT provides substantially seamless shifting between the plurality of transmission modes.Type: GrantFiled: June 21, 2017Date of Patent: May 19, 2020Assignee: DEERE & COMPANYInventors: Andrew K. Rekow, Rainer Gugel, David Mueller, Thomas G. Ore, Dennis L. Jeffries
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Patent number: 10550922Abstract: An infinitely variable transmission (IVT) provides a plurality of transmission modes. At least one mode is a serial mode and at least one other mode is a split-path mode. The serial mode may provide a powered zero and creeper ground speeds. The split-path mode(s) may provide higher field speeds.Type: GrantFiled: January 25, 2018Date of Patent: February 4, 2020Assignee: DEERE & COMPANYInventors: Andrew K. Rekow, Rainer Gugel, David Mueller, Thomas G. Ore, Dennis L. Jeffries
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Patent number: 10479187Abstract: An integrated hybrid power system for a work vehicle includes an engine and an electric machine. The power system also includes a transmission configured to transfer mechanical power between the engine and the electric machine. The transmission, in a first configuration, is configured to transfer mechanical power in a first direction from the electric machine to the engine to start the engine. Furthermore, the transmission, in a second configuration, is configured to transfer mechanical power in the first direction and, alternatively, in a second direction from the engine to the electric machine after the engine is started.Type: GrantFiled: November 29, 2017Date of Patent: November 19, 2019Assignee: DEERE & COMPANYInventors: Jeffrey L. Lubben, Andrew K. Rekow
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Patent number: 10408310Abstract: A power-split gearbox device in an agricultural work vehicle. The gearbox device includes a compounded gearbox, an electrical variator for the continuous varying of a ratio of the compounded gearbox, and a gearbox with an adjustable ratio to connect a drive motor with a propulsion of the work vehicle.Type: GrantFiled: September 24, 2015Date of Patent: September 10, 2019Assignee: DEERE & COMPANYInventors: Rainer Gugel, Norbert Fritz, Andrew K. Rekow, Dennis L. Jeffries, David Mueller
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Patent number: 10323720Abstract: A hydraulic synchronizer selectively couples one or more gears to a drive shaft. The synchronizer has a shaft hub with a splined annulus and a fluid passage. A ring is disposed about the shaft hub and movable along a rotation axis of the shaft hub. A shift collar is fixedly coupled to the ring and has a splined annulus engaged with the splined annulus of the shaft hub. The shift collar is configured to engage splines of a gear when the ring is in an engaged axial position and to disengage the splines of the gear when the ring is in a neutral position. The shift collar transmits rotational input from the shaft hub to the gear when the ring is in the engaged axial position. Hydraulic chambers receive hydraulic fluid from the fluid passage and move the ring to the engaged and neutral positions.Type: GrantFiled: June 20, 2016Date of Patent: June 18, 2019Assignee: DEERE & COMPANYInventors: Andrew K. Rekow, Matthew B. Winhold
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Publication number: 20190160936Abstract: An integrated hybrid power system for a work vehicle includes an engine and an electric machine. The power system also includes a transmission configured to transfer mechanical power between the engine and the electric machine. The transmission, in a first configuration, is configured to transfer mechanical power in a first direction from the electric machine to the engine to start the engine. Furthermore, the transmission, in a second configuration, is configured to transfer mechanical power in the first direction and, alternatively, in a second direction from the engine to the electric machine after the engine is started.Type: ApplicationFiled: November 29, 2017Publication date: May 30, 2019Inventors: Jeffrey L. Lubben, Andrew K. Rekow
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Publication number: 20180361845Abstract: A method of shifting ranges within a transmission is provided. The method of an embodiment includes determining an intention to change from a first mode to a second mode in the transmission, determining the first mode of the transmission, which includes a first range clutch in an engaged condition and a first synchronizer in a first engaged condition, determining the second mode of the transmission, which includes a second range clutch in an engaged condition and a second synchronizer in a first engaged condition, engaging the second synchronizer in the first engaged condition, disengaging the first range clutch, engaging the second range clutch, and disengaging the first synchronizer from the first engaged condition.Type: ApplicationFiled: August 27, 2018Publication date: December 20, 2018Inventors: DAVID MUELLER, ANDREW K. REKOW, THOMAS H. VU, RAINER GUGEL, WERNER STETTLER
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Patent number: 10119598Abstract: An infinitely variable transmission (IVT) includes a double planetary gearset with first, second, and third transmission components. The IVT includes a single planetary gearset with fourth, fifth, and sixth transmission components. In one mode, a first set of clutches is engaged, allowing transmission of engine power to the first transmission component, and allowing transmission of IVP power between a second IVP machine and the second transmission component. The third transmission component combines the engine power and the IVP power into first combined power that is transmitted from the third transmission component to the fourth transmission component. The fifth transmission component transmits return power to an engine shaft, and the sixth transmission component combines the first combined power and the return power into second combined power that is output to an output shaft for rotating the output shaft at a range of rotational speeds.Type: GrantFiled: December 20, 2016Date of Patent: November 6, 2018Assignee: DEERE & COMPANYInventors: Andrew K. Rekow, Rainer Gugel, David Mueller, Thomas G. Ore, Dennis L. Jeffries
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Patent number: 10086686Abstract: In accordance with an example embodiment, a transmission may include a first mode in which a low range clutch is engaged and a first synchronizer is in a first engaged condition causing an output shaft to rotate relative to a first range shaft based upon a ratio of a first range gear to a second range gear. The transmission may include a second mode in which a high range clutch is engaged and a second synchronizer is in a first engaged condition causing the output shaft to rotate relative to a second range shaft based upon a ratio of the first range gear to the second range gear. A shift from the first mode to the second mode includes engaging the second synchronizer in the first engaged condition before disengaging the low range clutch and engaging the high range clutch.Type: GrantFiled: January 14, 2016Date of Patent: October 2, 2018Assignee: DEERE & COMPANYInventors: David Mueller, Andrew K Rekow, Thomas H Vu, Rainer Gugel, Werner Stettler
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Publication number: 20180172123Abstract: A range-shift transmission has a range input shaft, on which gear wheels of gear pairs of at least two range groups are arranged coaxially. The range input shaft is drivingly connected to a range output shaft via a gearwheel pair of a range group. The range-shift transmission has a second input shaft arranged coaxially and rotatably relative to the range input shaft.Type: ApplicationFiled: February 16, 2018Publication date: June 21, 2018Inventors: David Mueller, Rainer Gugel, Andrew K. Rekow
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Publication number: 20180149247Abstract: An infinitely variable transmission (IVT) provides a plurality of transmission modes. At least one mode is a serial mode and at least one other mode is a split-path mode. The serial mode may provide a powered zero and creeper ground speeds. The split-path mode(s) may provide higher field speeds.Type: ApplicationFiled: January 25, 2018Publication date: May 31, 2018Inventors: Andrew K. Rekow, Rainer Gugel, David Mueller, Thomas G. Ore, Dennis L. Jeffries
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Patent number: 9981665Abstract: A power train arrangement for a work vehicle with an engine may include an infinitely variable power source (“IVP”). An energy storage device may be configured to receive energy from the IVP for storage and to provide stored energy from the energy storage device to power one or more components of the IVP. A transmission may be configured to relay power from the engine and from the one or more components of the IVP to other components of the vehicle. A transient power event may be identified, during which a present operating state of the engine does not provide sufficient power for operations of the work vehicle. The energy storage device may be caused to provide stored energy to power the one or more components of the IVP source and thereby to provide power to the transmission.Type: GrantFiled: November 7, 2014Date of Patent: May 29, 2018Assignee: Deere & CompanyInventors: Andrew K. Rekow, Nicolai Tarasinski, Rainer Gugel, Dennis L. Jeffries, David Mueller, Craig A. Puetz, Norbert Fritz
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Patent number: 9976650Abstract: A forkless synchronizer arrangement selectively couples one or more gears to a drive shaft that is rotatable about a rotation axis. A shift collar, rotated by the drive shaft, is configured to disengage from a first of the gears when in a first neutral axial position and to engage the first gear when in a first engaged axial position to transmit rotational input from the drive shaft to the first gear. A rail is arranged in parallel with the rotation axis. A rail arm has an end fixedly coupled to the rail and another end coupled to the shift collar to permit relative rotation and to transmit axial shifting movement to the rail in response to axial movement of the shift collar between the first engaged and neutral axial positions. A sensor proximate the rail senses an axial position of the rail.Type: GrantFiled: February 1, 2017Date of Patent: May 22, 2018Assignee: Deere & CompanyInventors: Harmanpreet Singh, Poongundran Ganapathi, Matthew B. Winhold, Andrew K. Rekow
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Publication number: 20170363178Abstract: A hydraulic synchronizer selectively couples one or more gears to a drive shaft. The synchronizer has a shaft hub with a splined annulus and a fluid passage. A ring is disposed about the shaft hub and movable along a rotation axis of the shaft hub. A shift collar is fixedly coupled to the ring and has a splined annulus engaged with the splined annulus of the shaft hub. The shift collar is configured to engage splines of a gear when the ring is in an engaged axial position and to disengage the splines of the gear when the ring is in a neutral position. The shift collar transmits rotational input from the shaft hub to the gear when the ring is in the engaged axial position. Hydraulic chambers receive hydraulic fluid from the fluid passage and move the ring to the engaged and neutral positions.Type: ApplicationFiled: June 20, 2016Publication date: December 21, 2017Inventors: Andrew K. Rekow, Matthew B. Winhold
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Publication number: 20170284517Abstract: An infinitely variable transmission (IVT) provides a plurality of transmission modes. At least one mode is a serial mode and at least one other mode is a split-path mode. The IVT provides substantially seamless shifting between the plurality of transmission modes.Type: ApplicationFiled: June 21, 2017Publication date: October 5, 2017Inventors: Andrew K. Rekow, Rainer Gugel, David Mueller, Thomas G. Ore
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Publication number: 20170203646Abstract: In accordance with an example embodiment, a transmission may include a first mode in which a low range clutch is engaged and a first synchronizer is in a first engaged condition causing an output shaft to rotate relative to a first range shaft based upon a ratio of a first range gear to a second range gear. The transmission may include a second mode in which a high range clutch is engaged and a second synchronizer is in a first engaged condition causing the output shaft to rotate relative to a second range shaft based upon a ratio of the first range gear to the second range gear. A shift from the first mode to the second mode includes engaging the second synchronizer in the first engaged condition before disengaging the low range clutch and engaging the high range clutch.Type: ApplicationFiled: January 14, 2016Publication date: July 20, 2017Inventors: DAVID MUELLER, ANDREW K. REKOW, THOMAS H. VU, RAINER GUGEL, WERNER STETTLER
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Publication number: 20170102059Abstract: An infinitely variable transmission (IVT) includes a double planetary gearset with first, second, and third transmission components. The IVT includes a single planetary gearset with fourth, fifth, and sixth transmission components. In one mode, a first set of clutches is engaged, allowing transmission of engine power to the first transmission component, and allowing transmission of IVP power between a second IVP machine and the second transmission component. The third transmission component combines the engine power and the IVP power into first combined power that is transmitted from the third transmission component to the fourth transmission component. The fifth transmission component transmits return power to an engine shaft, and the sixth transmission component combines the first combined power and the return power into second combined power that is output to an output shaft for rotating the output shaft at a range of rotational speeds.Type: ApplicationFiled: December 20, 2016Publication date: April 13, 2017Inventors: Andrew K. Rekow, Rainer Gugel, David Mueller, Thomas G. Ore