Patents by Inventor Uwe Firzlaff
Uwe Firzlaff 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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Publication number: 20230299641Abstract: A stator assembly for an electric machine may have a stator including a stator core and a plurality of stator windings, which has a cooling system for cooling the stator, where the cooling system includes a cooling shell 10 encompassing the stator core, which is thermally coupled to the stator core, where the cooling system has a supply line connected to the cooling shell at the intake end and a return line connected to the cooling shell at the outlet end, where the cooling system has at least one coolant pump and one coolant container, where the coolant pump is connected to the supply line in the flow path between the coolant container and the cooling shell in order to supply coolant to the cooling shell through the supply line.Type: ApplicationFiled: March 21, 2023Publication date: September 21, 2023Applicant: ZF Friedrichshafen AGInventors: Christian Michel, Uwe Firzlaff
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Patent number: 11199231Abstract: A flexible traction drive mechanism for a motor vehicle transmission includes a first traction mechanism wheel which can be rotationally fixed to a first transmission component, a second traction mechanism wheel which is drivingly connected to the first traction mechanism wheel by a traction mechanism and can be rotationally fixed to a second transmission component, and a bearing journal for supporting the first traction mechanism wheel. The first traction mechanism wheel is arranged so as to be axially movable relative to the bearing journal.Type: GrantFiled: September 6, 2018Date of Patent: December 14, 2021Assignee: ZF FRIEDRICHSHAFEN AGInventors: Sven Holst, Uwe Firzlaff
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Patent number: 10273956Abstract: A vane cell pump for a transmission of a motor vehicle includes a housing. A rotor defines a plurality of slots. The plurality of slots runs radially. A plurality of vanes is arranged in the plurality of slots of the rotor. An end plate is positioned in a bottom area of the housing. The end plate is configured as a fluid guide with a suction channel and a pressure channel. The end plate forms a bottom wall of the housing.Type: GrantFiled: February 8, 2017Date of Patent: April 30, 2019Assignee: ZF FRIEDRICHSHAFEN AGInventors: Uwe Firzlaff, Christian Michel, Florian Pöhnlein, Stefan Csajagi
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Publication number: 20190072141Abstract: A flexible traction drive mechanism for a motor vehicle transmission includes a first traction mechanism wheel which can be rotationally fixed to a first transmission component, a second traction mechanism wheel which is drivingly connected to the first traction mechanism wheel by a traction mechanism and can be rotationally fixed to a second transmission component, and a bearing journal for supporting the first traction mechanism wheel. The first traction mechanism wheel is arranged so as to be axially movable relative to the bearing journal.Type: ApplicationFiled: September 6, 2018Publication date: March 7, 2019Inventors: Sven Holst, Uwe Firzlaff
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Publication number: 20170227004Abstract: A vane cell pump for a transmission of a motor vehicle includes a housing. A rotor defines a plurality of slots. The plurality of slots runs radially. A plurality of vanes is arranged in the plurality of slots of the rotor. An end plate is positioned in a bottom area of the housing. The end plate is configured as a fluid guide with a suction channel and a pressure channel. The end plate forms a bottom wall of the housing.Type: ApplicationFiled: February 8, 2017Publication date: August 10, 2017Inventors: Uwe Firzlaff, Christian Michel, Florian Pöhnlein, Stefan Csajagi
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Patent number: 9033107Abstract: An arrangement of an oil pump (8) and its drive in a transmission (1) that has a transmission housing (2) and at least one transmission shaft (3). The oil pump (8) is arranged coaxially with the at least one transmission shaft (3). The oil pump (8) is arranged on and can be driven by the at least one transmission shaft (3).Type: GrantFiled: November 4, 2011Date of Patent: May 19, 2015Assignee: ZF Friedrichshafen AGInventors: Thomas Schneider, Uwe Firzlaff
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Patent number: 9027440Abstract: A transmission, for a motor vehicle with an auxiliary drive (EM), having a first housing part (2a), a second housing part, a transmission shaft (GW), an auxiliary drive shaft which can be driven by the auxiliary drive (EM), a lay shaft (VW) that is positioned axially parallel to the transmission shaft (GW) and coaxial to the auxiliary drive shaft. The lay shaft (VW) is connected, via a spur wheel stage (Z22, Z23) with the transmission shaft (GW), and the lay shaft (VW) is connected in a rotationally fixed manner with the auxiliary drive shaft and is supported on both sides of the spur wheel stage (Z22, Z23) in a bearing device (9).Type: GrantFiled: November 16, 2012Date of Patent: May 12, 2015Assignee: ZF Friedrichshafen AGInventors: Thomas Schneider, Uwe Firzlaff, Franz Schmidberger, Markus Hoher
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Patent number: 8840515Abstract: A motor vehicle transmission with a main chamber in which rotation of an input shaft is converted and transmitted to a main shaft connected to a housing of a differential gearbox. The housing can drive two output gears such that different rotational speeds of the output gears can be produced by compensating elements of the differential gearbox. A clutch, with one side connected to the housing and another side connected to the output gear concerned, is provided between one of the two output gears and the housing. The two sides couple due to a pressure build up. The actuating chamber is completely separated from the main chamber and, in the area of the differential gearbox, an impermeable membrane is provided as a separator, which changes its shape as pressure builds up in the actuating chamber and actuates the clutch via an actuating device.Type: GrantFiled: November 24, 2010Date of Patent: September 23, 2014Assignee: ZF Friedrichshafen AGInventors: Frederik Ernst Carel Van Der Hardt Aberson, Klaus Muller, Uwe Firzlaff
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Publication number: 20120289373Abstract: A motor vehicle transmission with a main chamber in which rotation of an input shaft is converted and transmitted to a main shaft connected to a housing of a differential gearbox. The housing can drive two output gears such that different rotational speeds of the output gears can be produced by compensating elements of the differential gearbox. A clutch, with one side connected to the housing and another side connected to the output gear concerned, is provided between one of the two output gears and the housing. The two sides couple due to a pressure build up. The actuating chamber is completely separated from the main chamber and, in the area of the differential gearbox, an impermeable membrane is provided as a separator, which changes its shape as pressure builds up in the actuating chamber and actuates the clutch via an actuating device.Type: ApplicationFiled: November 24, 2010Publication date: November 15, 2012Applicant: ZF FRIEDRICHSHAFEN AGInventors: Frederik Ernst Carel Van Der Hardt Aberson, Klaus Muller, Uwe Firzlaff
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Publication number: 20120128521Abstract: An arrangement of an oil pump (8) and its drive in a transmission (1) that has a transmission housing (2) and at least one transmission shaft (3). The oil pump (8) is arranged coaxially with the at least one transmission shaft (3). The oil pump (8) is arranged on and can be driven by the at least one transmission shaft (3).Type: ApplicationFiled: November 4, 2011Publication date: May 24, 2012Applicant: ZF FRIEDRICHSHAFEN AGInventors: Thomas SCHNEIDER, Uwe FIRZLAFF
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Patent number: 7824302Abstract: A transmission having gearsets (RS1-RS4), shafts (1-8) and shifting elements (A-E). A carrier of gearset (RS4) and an input shaft forming shaft (1), a carrier of gearset (RS3) and an output shaft form shaft (2), sun gears of gearsets (RS3, RS4) form shaft (3). A ring gear of gearset (RS1) forms shaft (4). Ring and sun gears respectively of gearsets (RS2, RS1) couple as shaft (5), a carrier of gearset (RS1) and a ring gear of gearset (RS3) form shaft (6), sun and ring gears respectively of gearsets (RS2, RS4) couple as shaft (7). A carrier of gearset (RS2) forms shaft (8). Located in the flow of power: elements (A, B) are respectively between shafts (3, 4) and a housing, element (C) between shafts (5, 1), element (D) between shafts (8, 2) or (8, 6) and element (E) between two of shafts (5, 7, 8).Type: GrantFiled: March 15, 2006Date of Patent: November 2, 2010Assignee: ZF Friedrichshafen AGInventors: Gabor Diosi, Josef Haupt, Gerhard Gumpoltsberger, Peter Ziemer, Hagen Döpfert, Uwe Firzlaff, Martin Brehmer, Christoph Hutzel
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Patent number: 7575528Abstract: A continuously variable transmission having an input cone pulley pair and an output cone pulley pair linked by and an encircling mechanism. One pulley of each pair is axially fixed and one pulley is axially displaceable to control the transmission ratio of the transmission. A recoil spring engages between the input moveable pulley and an axially fixed contact surface only when the transmission is in the low transmission ratio range for exerting a force to displace the input moveable cone pulley to a high transmission ratio to avoid damage to the transmission or starting clutch during towing.Type: GrantFiled: November 19, 2004Date of Patent: August 18, 2009Assignee: ZF Friedrichshafen AGInventors: Detlef Plath, Uwe Firzlaff
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Publication number: 20080269004Abstract: The 8-stage transmission possesses one input and one output shaft (AN, AB), four planetary gearsets (RS1, RS2, RS3, RS4), eight rotational shafts (1 to 8) and five shifting elements (A to E). One carrier (ST4) of the fourth planetary gearset (RS4) and the input shaft (AN) are bound together to form the first shaft (1), a carrier (ST3) of the third planetary gearset (RS3) and the output shaft (AB) serve as the second shaft (2), a sun gear (SO3) of the third planetary gearset (RS3) and a sun gear (SO4) of the fourth planetary gearset (RS4) form the third shaft (3). An internal gear (HO1) of the first planetary gearset (RS1) forms the fourth shaft (4).Type: ApplicationFiled: March 15, 2006Publication date: October 30, 2008Applicant: ZF Friedrichshafen AGInventors: Gabor Diosi, Josef Haupt, Gerhard Gumpol Tsberger, Peter Ziemer, Hagen Dopfert, Uwe Firzlaff, Martin Brehmer, Christoph Hutzel
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Publication number: 20050181899Abstract: A cone pulley continuously variable transmission comprising one primary pulley pair, one secondary pulley pair and one encircling mechanism spanning the pulley pairs. The distances between the pulleys of each pulley pair are adjustable in opposite directions for changing the ratio by way of hydraulic setting device. A spring device acts upon an axially displacable secondary pulley and a spring device prestresses the input-side primary pulley pair in case of gear distance between its pulleys in direction to reduction of the distance. To improve the mode of operation of such a transmission during a towing process, the spring tensions of the input-side spring device and the output-side spring device is coordinated to prevent, during a towing process with deactivated hydraulic pressure supply, a closing of an input-shaft side starting clutch determined by rotational speed and/or drag torque or damage of the primary pulley or of the encircling mechanism.Type: ApplicationFiled: November 19, 2004Publication date: August 18, 2005Inventors: Detlef Plath, Uwe Firzlaff