Patents by Inventor Stefan Csajagi

Stefan Csajagi 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).

  • Publication number: 20230073972
    Abstract: A transmission includes an oil sump and at least one oil bunker arranged separated from the oil sump within the transmission. The transmission includes a valve having a channel body, at least one sump port, at least one bunker port, and a mechanical actuating element. The channel body has at least one oil duct. The at least one oil duct connects the at least one bunker port to the at least one sump port. The mechanical actuating element is configured for temperature-dependently deforming to transfer the valve out of a closed position into at least one open position. The at least one oil bunker is connected to the oil sump via the valve when the valve is in the at least one open state. The at least one oil bunker is not connected to the oil sump via the valve when the valve is in the closed state.
    Type: Application
    Filed: August 22, 2022
    Publication date: March 9, 2023
    Inventors: Markus Herrmann, Florian Langenbacher, Florian Staetter, Stefan Csajagi, Esben Madsen
  • Patent number: 10273956
    Abstract: 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: Grant
    Filed: February 8, 2017
    Date of Patent: April 30, 2019
    Assignee: ZF FRIEDRICHSHAFEN AG
    Inventors: Uwe Firzlaff, Christian Michel, Florian Pöhnlein, Stefan Csajagi
  • Publication number: 20170227004
    Abstract: 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: Application
    Filed: February 8, 2017
    Publication date: August 10, 2017
    Inventors: Uwe Firzlaff, Christian Michel, Florian Pöhnlein, Stefan Csajagi
  • Patent number: 9327691
    Abstract: A transmission parking lock has an actuating rod that is essentially translationally displaceable, which bears an actuating element, and with a locking lever that is essentially rotationally displaceable, bears a locking element For inserting the transmission parking lock through the displacement of the actuating rod, the locking lever is pivotable from a resting position of the same into a locked position in such a manner that the locking element engages in a recess of a gear wheel (8) allocated to a gear shaft, and with a device that withdraws the actuating element of the actuating rod in the resting position of the same from the locking lever.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: May 3, 2016
    Assignee: ZF FRIEDRICHSHAFEN AG
    Inventors: Matthias List, Bernd Austermann, Gert Hanker, Stefan Csajagi, Gerhard Spindler, Berthold Schraff
  • Publication number: 20140251750
    Abstract: A transmission parking lock has an actuating rod that is essentially translationally displaceable, which bears an actuating element, and with a locking lever that is essentially rotationally displaceable, bears a locking element For inserting the transmission parking lock through the displacement of the actuating rod, the locking lever is pivotable from a resting position of the same into a locked position in such a manner that the locking element engages in a recess of a gear wheel (8) allocated to a gear shaft, and with a device that withdraws the actuating element of the actuating rod in the resting position of the same from the locking lever.
    Type: Application
    Filed: September 20, 2012
    Publication date: September 11, 2014
    Inventors: Matthias List, Bernd Austermann, Gert Hanker, Stefan Csajagi, Gerhard Spindler, Berthold Schraff
  • Patent number: 7950323
    Abstract: A shifting device (1) for shifting a motor vehicle transmission with a shift selector shaft on which a plurality of shift elements (2) such as shift forks or shift rockers (3) are arranged and can be displaced to carry out a shifting operation. The shifting device (1) includes one hydraulic shift cylinder (5, 11, 18, 25), that can be actuated from both sides, with a piston (9, 15, 16, 19, 26) that can be displaced within a cylinder housing (6) and which is actively connected with a shift element (2) to be actuated. To simplify a shifting device (1) of this type, the piston (9, 15, 16, 19, 26) has a piston rod (10, 17, 23, 29) that follows the movement of the piston (9, 15, 16, 19, 26) and can be connected directly to the shift element (2) in a detachable manner.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: May 31, 2011
    Assignee: ZF Friedrichshafen AG
    Inventors: Rudolf Kauffeldt, Hans-Joachim Martin, Gerhard Gumpoltsberger, Michael Ebenhoch, Wolfgang Rieger, Michael Drabek, Stefan Csajagi
  • Publication number: 20080296112
    Abstract: A shifting device (1) for shifting a motor vehicle transmission with a shift selector shaft on which a plurality of shift elements (2) such as shift forks or shift rockers (3) are arranged and can be displaced to carry out a shifting operation. The shifting device (1) includes one hydraulic shift cylinder (5, 11, 18, 25), that can be actuated from both sides, with a piston (9, 15, 16, 19, 26) that can be displaced within a cylinder housing (6) and which is actively connected with a shift element (2) to be actuated. To simplify a shifting device (1) of this type, the piston (9, 15, 16, 19, 26) has a piston rod (10, 17, 23, 29) that follows the movement of the piston (9, 15, 16, 19, 26) and can be connected directly to the shift element (2) in a detachable manner.
    Type: Application
    Filed: February 2, 2007
    Publication date: December 4, 2008
    Applicant: ZF Friedrichshafen AG
    Inventors: Rudolf Kauffeldt, Hans-Joachim Martin, Gerhard Gumpoltsberger, Michael Ebenhoch, Wolfgang Rieger, Michael Drabek, Stefan Csajagi
  • Patent number: 7182195
    Abstract: A parking lock of an automatic transmission avoiding an undesirable engagement of a lock member (2) in a parking lock gear, during occurring extreme accelerations in normal driving of a motor vehicle. An arrester (7) is provided which, in the driving gear stages of the transmission, retains the lock member (2) with an arresting shape fit.
    Type: Grant
    Filed: December 13, 2004
    Date of Patent: February 27, 2007
    Assignee: ZF Friedrichshafen AG
    Inventors: Linus Eschenbeck, Markus Hoher, Stefan Csajagi
  • Publication number: 20050133338
    Abstract: A parking lock of an automatic transmission avoiding an undesirable engagement of a lock member (2) in a parking lock gear, during occurring extreme accelerations in normal driving of a motor vehicle. An arrester (7) is provided which, in the driving gear stages of the transmission, retains the lock member (2) with an arresting shape fit.
    Type: Application
    Filed: December 13, 2004
    Publication date: June 23, 2005
    Inventors: Linus Eschenbeck, Markus Hoher, Stefan Csajagi