Patents by Inventor Hagen Döpfert

Hagen Döpfert 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: 11261943
    Abstract: A multi-stage planetary transmission for a bicycle or a pedelec includes a transmission input shaft (1), a transmission output shaft (2), and at least three planetary gear sets (VRS, VR1, VR2, RS1, RS2, NRS, NR1, NR2). A first planetary gear set (RS1) and a second planetary gear set (RS2) are configured as a main gear set and at least one further planetary gear set (VRS, VR1, VR2, NRS, NR1, NR2) is configured as a front-mounted gear set and/or as a rear-mounted gear set. At least three free-wheel clutches (F1, F2, F3, F4) and at least three brakes (B1, B2, B3, B4) are provided for implementing at least eight gears (G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11, G12, G13, G14, G15, G16). Moreover, the multi-stage transmission may be a bottom bracket transmission. In addition, a bicycle or pedelec with the multi-stage transmission is proposed.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: March 1, 2022
    Assignee: ZF FRIEDRICHSHAFEN AG
    Inventors: Peter Ziemer, Christoph Margraf, Thomas Riedisser, Ulrich Doerr, Kim Führer, Hagen Doepfert
  • Publication number: 20210207689
    Abstract: A multi-stage planetary transmission for a bicycle or a pedelec includes a transmission input shaft (1), a transmission output shaft (2), and at least three planetary gear sets (VRS, VR1, VR2, RS1, RS2, NRS, NR1, NR2). A first planetary gear set (RS1) and a second planetary gear set (RS2) are configured as a main gear set and at least one further planetary gear set (VRS, VR1, VR2, NRS, NR1, NR2) is configured as a front-mounted gear set and/or as a rear-mounted gear set. At least three free-wheel clutches (F1, F2, F3, F4) and at least three brakes (B1, B2, B3, B4) are provided for implementing at least eight gears (G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11, G12, G13, G14, G15, G16). Moreover, the multi-stage transmission may be a bottom bracket transmission. In addition, a bicycle or pedelec with the multi-stage transmission is proposed.
    Type: Application
    Filed: April 29, 2019
    Publication date: July 8, 2021
    Inventors: Peter Ziemer, Christoph Margraf, Thomas Riedisser, Ulrich Doerr, Kim Führer, Hagen Doepfert
  • Patent number: 10302146
    Abstract: A dog clutch (10) includes a piston (22) that is firmly connected to a sensor bolt (48) at one axial end of the sensor bolt (48). The piston (22) is coaxially aligned with the sensor bolt (48), and the sensor bolt (48) is configured as a sensor element for a position sensor (70) at a sensor section (52) of the sensor bolt (48) that is positioned on a free, piston-remote axial end (78) of the sensor bolt (48).
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: May 28, 2019
    Assignee: ZP FRIEDRICHSHAFEN AG
    Inventors: Hagen Doepfert, Oliver Bayer, Peter Tiesler, Harald Stier
  • Publication number: 20170328419
    Abstract: The invention relates to a dog clutch (10) with an axially fixed coupling element (12) and an axially movable coupling element (14), in which the axially fixed coupling element (12) and the axially movable coupling element (14) are configured to be sleeve-shaped and are disposed coaxially to one another, in which the axially movable coupling element (14) is axially displaceable by means of a pressurizing medium-actuatable piston (22) to establish a positively locking connection with the axially fixed coupling element (12), in which the piston (22) is disposed in a longitudinally displaceable manner in a cylinder housing (20), which radially on the outside carries the axially movable coupling element (14), in which the piston (22) is connected to the axially movable coupling element (14) via a piston pin (26), and in which a pressurizing medium (40) can be supplied to the cylinder space (60) of the cylinder housing (20) via a supply duct (38), wherein, at one axial end, the piston (22) is permanently connected
    Type: Application
    Filed: November 19, 2015
    Publication date: November 16, 2017
    Inventors: Hagen DOEPFERT, Oliver BAYER, Peter TIESLER, Harald STIER
  • Patent number: 8613687
    Abstract: A planetary gearbox, for an automatic transmission of a motor vehicle, comprising two stages, each provided with a sun gear, a ring gear and interposed planetary gears. The ring gear of the first planetary stage also forms the sun gear of the second stage, and the planetary gears of both stages are guided by a common planet carrier, produced from a casting material, which accommodates the planetary gears of the first stage at an axial offset position to the planetary gears of the second stage. The planet carrier is designed as one-piece such that pockets are respectively disposed in the planet carrier for receiving the planetary gears of the first stage at an offset angle, in the circumferential direction, to the pockets for receiving the planetary gears of the second stage, so that it is possible to form the pockets during casting using slides.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: December 24, 2013
    Assignee: ZF Friedrichshafen AG
    Inventors: Hagen Döpfert, Alexander Bucher, Peter Ziemer, Ulrich Hantke
  • Publication number: 20120083384
    Abstract: A planetary gearbox, for an automatic transmission of a motor vehicle, comprising two stages, each provided with a sun gear, a ring gear and interposed planetary gears. The ring gear of the first planetary stage also forms the sun gear of the second stage, and the planetary gears of both stages are guided by a common planet carrier, produced from a casting material, which accommodates the planetary gears of the first stage at an axial offset position to the planetary gears of the second stage. The planet carrier is designed as one-piece such that pockets are respectively disposed in the planet carrier for receiving the planetary gears of the first stage at an offset angle, in the circumferential direction, to the pockets for receiving the planetary gears of the second stage, so that it is possible to form the pockets during casting using slides.
    Type: Application
    Filed: May 19, 2010
    Publication date: April 5, 2012
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Peter Ziemer, Hagen Doepfert, Alexander Bucher, Ulrich Hantke
  • Publication number: 20110278132
    Abstract: A parking lock device (1) for an automatic transmission of a motor vehicle. The parking lock device (1) comprises a locking pawl (3) that is fixed to the transmission housing and mounted so that the locking pawl (3) can pivot. The parking lock device (1) has a guiding element (3b) and a guide plate (5) fixed to and supported by the housing in which the guide element (3b) of the locking pawl (3) is guided laterally. One of a low-friction supporting element (7, 8) and an electrically insulating supporting element in a form of an insulating body (107) laterally guides the locking pawl (3).
    Type: Application
    Filed: April 19, 2011
    Publication date: November 17, 2011
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Hagen DÖPFERT, Matthias LIST
  • Patent number: 7824302
    Abstract: 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: Grant
    Filed: March 15, 2006
    Date of Patent: November 2, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Gabor Diosi, Josef Haupt, Gerhard Gumpoltsberger, Peter Ziemer, Hagen Döpfert, Uwe Firzlaff, Martin Brehmer, Christoph Hutzel