Patents by Inventor Siegfried Tisch

Siegfried Tisch 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: 8997709
    Abstract: A mass equalization gear mechanism of an internal combustion engine is provided, having a gear mechanism housing (8) with bearing points (16, 17, 18), at least one equalization shaft (6) with a drive section (9) and an imbalance section (12) and rolling bearings (10, 11, 15) by which the equalization shaft is mounted in the bearing points. In this context, the gear mechanism housing is hydraulically sealed, with the result that the imbalance section and at least one of the rolling bearings is hydraulically separated from the drive section and is provided with autonomous lubrication.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: April 7, 2015
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Robin Raab, Siegfried Tisch, Peter Solfrank
  • Patent number: 8881705
    Abstract: A mass-balancing transmission of an internal combustion engine (1) is provided, having a transmission housing (8) and a balancing shaft (6) with a bearing point (10, 11) at which the balancing shaft is mounted radially in a bearing seat (12, 13) of the balancing housing, and having an unbalanced section (9) which is formed in one part with the bearing point of the originally shaped balancing shaft. The bearing point is set back radially compared to the unbalanced section with the result that the diameter relationship: d2>d1 applies for the external envelope circle d1 of the bearing point and the external envelope circle d2 of the unbalanced section. Considered in the axial direction of the balancing shaft, the external envelope circle d2 of the unbalance section and the external envelope circle d1 of the bearing point extend offset to one another with an eccentricity of e.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: November 11, 2014
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventor: Siegfried Tisch
  • Publication number: 20140109860
    Abstract: A mass equalization gear mechanism of an internal combustion engine is provided, having a gear mechanism housing (8) with bearing points (16, 17, 18), at least one equalization shaft (6) with a drive section (9) and an imbalance section (12) and rolling bearings (10, 11, 15) by which the equalization shaft is mounted in the bearing points. In this context, the gear mechanism housing is hydraulically sealed, with the result that the imbalance section and at least one of the rolling bearings is hydraulically separated from the drive section and is provided with autonomous lubrication.
    Type: Application
    Filed: April 18, 2012
    Publication date: April 24, 2014
    Applicant: Schaeffler Technologies AG & Co. KG
    Inventors: Robin Raab, Siegfried Tisch, Peter Solfrank
  • Publication number: 20130220070
    Abstract: A mass-balancing transmission of an internal combustion engine (1) is provided, having a transmission housing (8) and a balancing shaft (6) with a bearing point (10, 11) at which the balancing shaft is mounted radially in a bearing seat (12, 13) of the balancing housing, and having an unbalanced section (9) which is formed in one part with the bearing point of the originally shaped balancing shaft. The bearing point is set back radially compared to the unbalanced section with the result that the diameter relationship: d2 >d1 applies for the external envelope circle d1 of the bearing point and the external envelope circle d2 of the unbalanced section. Considered in the axial direction of the balancing shaft, the external envelope circle d2 of the unbalance section and the external envelope circle d1 of the bearing point extend offset to one another with an eccentricity of e.
    Type: Application
    Filed: July 25, 2011
    Publication date: August 29, 2013
    Applicant: Schaeffler Technologies AG & co. KG
    Inventor: Siegfried Tisch
  • Patent number: 8393310
    Abstract: A mass balancing mechanism of an internal combustion engine, in which the mechanism includes a compensation shaft (1, 1?) formed as a tubular carrier shaft (5, 5?) having a mounting point (10, 10?) for the radial mounting of the compensation shaft. The mechanism further includes an unbalanced mass (6) joined to the carrier shaft. A needle roller bearing (2) is used for a radial rolling bearing-mounting of the compensation shaft, with the needle rollers (11) of the needle roller bearing being in rolling contact with the mounting point which is configured as an inner raceway and possesses a width which is variable in peripheral direction, so that, in a region situated diametrically opposite a load zone in whose peripheral region the inner raceway is loaded by the radial load of the unbalanced mass which rotates together with the compensation shaft, a width (14) of the inner raceway is smaller than the length of the needle rollers and tapers clearly or is interrupted in peripheral direction.
    Type: Grant
    Filed: July 22, 2010
    Date of Patent: March 12, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Siegfried Tisch
  • Patent number: 8375916
    Abstract: A mass balancing mechanism for balancing mass forces and/or mass torques of an internal combustion engine, said mechanism comprising a balancing shaft comprising an axis of rotation, a mass center of gravity spaced from said axis of rotation and further comprising at least one bearing peg on which said balancing shaft is mounted for rotation in a mounting location of the internal combustion engine, the bearing peg includes two axially spaced cylindrical bearing peg sections that define a recess which extends substantially or entirely outside of the axis of rotation relative to the mass center of gravity.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: February 19, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Siegfried Tisch
  • Patent number: 8327542
    Abstract: The invention relates to a method for the production of a drop-forged balancing shaft for a mass balancing gear of an internal combustion engine. The balancing shaft has an unbalanced plane formed by the rotational axis thereof and an eccentric mass center of gravity, and at least one bearing journal, the outer lateral surface of which serves as a track for a rolling bearing supporting the balancing shaft in the internal combustion engine. To this end, the balancing shaft is to be forged in a forging die having a parting plane extending in the direction of the rotational axis and rotated in relation to the unbalanced plane.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: December 11, 2012
    Assignee: Schaeffler KG
    Inventors: Siegfried Tisch, Klaus Weigand
  • Patent number: 8256400
    Abstract: A piston pump, especially for supplying high-pressure fuel to a direct-injection internal combustion engine, including a pump housing (2) and a drive shaft (3a to 3i) for actuating one or several pump plungers (5) which are radially oriented relative to the drive shaft in the pump housing. The drive shaft is rotatably mounted on one or several bearings (11, 31, 49) extending between a shaft inlet (15) of the pump housing and a rear housing wall (20) located opposite the shaft inlet. One bearing (11) extends between an internal surface (17) of a hollow cylindrical section (10) of the drive shaft and an external surface (18) of a journal (19) that runs from the rear housing wall into the hollow cylindrical section.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: September 4, 2012
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Siegfried Tisch
  • Publication number: 20110139125
    Abstract: A piston pump, especially for supplying high-pressure fuel to a direct-injection internal combustion engine, including a pump housing (2) and a drive shaft (3a to 3i) for actuating one or several pump plungers (5) which are radially oriented relative to the drive shaft in the pump housing. The drive shaft is rotatably mounted on one or several bearings (11, 31, 49) extending between a shaft inlet (15) of the pump housing and a rear housing wall (20) located opposite the shaft inlet. One bearing (11) extends between an internal surface (17) of a hollow cylindrical section (10) of the drive shaft and an external surface (18) of a journal (19) that runs from the rear housing wall into the hollow cylindrical section.
    Type: Application
    Filed: May 31, 2007
    Publication date: June 16, 2011
    Applicant: SCHAEFFLER KG
    Inventor: Siegfried Tisch
  • Publication number: 20110030643
    Abstract: A mass balancing mechanism of an internal combustion engine, in which the mechanism includes a compensation shaft (1, 1?) formed as a tubular carrier shaft (5, 5?) having a mounting point (10, 10?) for the radial mounting of the compensation shaft. The mechanism further includes an unbalanced mass (6) joined to the carrier shaft. A needle roller bearing (2) is used for a radial rolling bearing-mounting of the compensation shaft, with the needle rollers (11) of the needle roller bearing being in rolling contact with the mounting point which is configured as an inner raceway and possesses a width which is variable in peripheral direction, so that, in a region situated diametrically opposite a load zone in whose peripheral region the inner raceway is loaded by the radial load of the unbalanced mass which rotates together with the compensation shaft, a width (14) of the inner raceway is smaller than the length of the needle rollers and tapers clearly or is interrupted in peripheral direction.
    Type: Application
    Filed: July 22, 2010
    Publication date: February 10, 2011
    Applicant: Schaeffler Technologies GmbH & Co. KG
    Inventor: Siegfried Tisch
  • Publication number: 20100199940
    Abstract: A mass balancing mechanism for balancing mass forces and/or mass torques of an internal combustion engine, said mechanism comprising a balancing shaft comprising an axis of rotation, a mass center of gravity spaced from said axis of rotation and further comprising at least one bearing peg on which said balancing shaft is mounted for rotation in a mounting location of the internal combustion engine, the bearing peg includes two axially spaced cylindrical bearing peg sections that define a recess which extends substantially or entirely outside of the axis of rotation relative to the mass center of gravity.
    Type: Application
    Filed: March 11, 2008
    Publication date: August 12, 2010
    Inventor: Siegfried Tisch
  • Publication number: 20100126457
    Abstract: The invention relates to a method for the production of a drop-forged balancing shaft for a mass balancing gear of an internal combustion engine. The balancing shaft has an unbalanced plane formed by the rotational axis thereof and an eccentric mass center of gravity, and at least one bearing journal, the outer lateral surface of which serves as a track for a rolling bearing supporting the balancing shaft in the internal combustion engine. To this end, the balancing shaft is to be forged in a forging die having a parting plane extending in the direction of the rotational axis and rotated in relation to the unbalanced plane.
    Type: Application
    Filed: March 19, 2008
    Publication date: May 27, 2010
    Applicant: SCHAEFFLER KG
    Inventors: Siegfried Tisch, Klaus Weigand
  • Patent number: 7628133
    Abstract: A radial bearing (1a, 1b, 1c, 1d), especially a roller bearing (9) comprising an outer part (3) opposite an inner part (6), which rotate relative to each other about a common longitudinal axis (5) is provided, wherein the radial bearing (1a, 1b, 1c, 1d) includes a bearing seat (8a, 8b, 8c, 8d), which is formed in the outer part (3) or on the inner part (6) and which is generally stationary relative to a radial load (10a, 10b, 10c, 10d) acting on the bearing seat (8a, 8b, 8c, 8d) in a load zone (12a, 12b, 12c, 12d). The bearing seat (8a, 8b, 8c, 8d) features a variable width over its extent in a direction of the longitudinal axis (5), such that, starting from the load zone (12a, 12b, 12c, 12d), the bearing seat (8a, 8b, 8c, 8d) is significantly narrowed outside of the load zone (12a, 12b, 12c, 12d).
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: December 8, 2009
    Assignee: Schaeffler KG
    Inventors: Siegfried Tisch, Peter Solfrank
  • Publication number: 20070177837
    Abstract: A radial bearing (1a, 1b, 1c, 1d), especially a roller bearing (9) comprising an outer part (3) opposite an inner part (6), which rotate relative to each other about a common longitudinal axis (5) is provided, wherein the radial bearing (1a, 1b, 1c, 1d) includes a bearing seat (8a, 8b, 8c, 8d), which is formed in the outer part (3) or on the inner part (6) and which is generally stationary relative to a radial load (10a, 10b, 10c, 10d) acting on the bearing seat (8a, 8b, 8c, 8d) in a load zone (12a, 12b, 12c, 12d). The bearing seat (8a, 8b, 8c, 8d) features a variable width over its extent in a direction of the longitudinal axis (5), such that, starting from the load zone (12a, 12b, 12c, 12d), the bearing seat (8a, 8b, 8c, 8d) is significantly narrowed outside of the load zone (12a, 12b, 12c, 12d).
    Type: Application
    Filed: October 12, 2006
    Publication date: August 2, 2007
    Applicant: SCHAEFFLER KG
    Inventors: Siegfried Tisch, Peter Solfrank
  • Patent number: 7160194
    Abstract: A displacement joint includes an outer joint part having circumferentially spaced recesses to form tracks. A tripod is mounted in fixed rotative engagement to a driveshaft and includes a tripod spider which has spherical arms spaced circumferentially in symmetric disposition for engaging the recesses. Roller bearing assemblies are fitted in the outer joint part to support the tripod arms, with each tripod arm guided by two roller bearing assemblies. Each roller bearing assembly has a bearing shell, which receives the tripod arm, rolling members fitted with clearance in a cage and disposed between the track of the outer joint part and a contact surface of the bearing shell. The cage is guided by shoulders of the outer joint part, which laterally bound the track, wherein the cage has opposite collars in parallel relationship to the shoulders for providing an axial stop for the rolling members and the bearing shell.
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: January 9, 2007
    Assignee: INA Schaeffler KG
    Inventors: Piotr Olszewski, Siegfried Tisch, Martin Kruppa, Wolfgang Fugel
  • Patent number: 7140967
    Abstract: A displacement joint includes an outer joint part having circumferentially spaced recesses to form tracks. A tripod is mounted in fixed rotative engagement to a driveshaft and includes a tripod spider which has spherical arms spaced circumferentially in symmetric disposition for engaging the recesses. Roller bearing assemblies are fitted in the outer joint part to support the tripod arms, with each tripod arm guided by two roller bearing assemblies. Each roller bearing assembly has a bearing shell, which receives the tripod arm, rolling members fitted with clearance in a cage and disposed between the track of the outer joint part and a contact surface of the bearing shell. The cage is guided by shoulders of the outer joint part, which laterally bound the track, wherein the cage has opposite collars in parallel relationship to the shoulders for providing an axial stop for the rolling members and the bearing shell.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: November 28, 2006
    Assignee: INA-Schaeffler KG
    Inventors: Piotr Olszewski, Siegfried Tisch, Martin Kruppa, Wolfgang Fugel
  • Patent number: 7066478
    Abstract: A front axle of a motor vehicle with steerable, driven or non-driven wheels on steering knuckles pivotably hinged at a wheel-guiding element with an upper and a lower bearing position, each of which accommodates a radial bearing for mounting a steering knuckle bolt with a pot-shaped sleeve with a sealed lubricant reservoir and forms a bearing bushing. A stop disk is arranged a bottom of the sleeve to absorb axial forces and roll bodies of the radial bearing are supported with the supporting surfaces at the stop disk.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: June 27, 2006
    Assignees: INA-Schaeffler KG, DaimlerChrysler AG
    Inventors: Siegfried Tisch, Johann Hamperl
  • Publication number: 20060116211
    Abstract: A displacement joint includes an outer joint part having circumferentially spaced recesses to form tracks. A tripod is mounted in fixed rotative engagement to a driveshaft and includes a tripod spider which has spherical arms spaced circumferentially in symmetric disposition for engaging the recesses. Roller bearing assemblies are fitted in the outer joint part to support the tripod arms, with each tripod arm guided by two roller bearing assemblies. Each roller bearing assembly has a bearing shell, which receives the tripod arm, rolling members fitted with clearance in a cage and disposed between the track of the outer joint part and a contact surface of the bearing shell. The cage is guided by shoulders of the outer joint part, which laterally bound the track, wherein the cage has opposite collars in parallel relationship to the shoulders for providing an axial stop for the rolling members and the bearing shell.
    Type: Application
    Filed: January 9, 2006
    Publication date: June 1, 2006
    Inventors: Piotr Olszewski, Siegfried Tisch, Martin Kruppa, Wolfgang Fugel
  • Publication number: 20040038742
    Abstract: A displacement joint includes an outer joint part having circumferentially spaced recesses to form tracks. A tripod is mounted in fixed rotative engagement to a driveshaft and includes a tripod spider which has spherical arms spaced circumferentially in symmetric disposition for engaging the recesses. Roller bearing assemblies are fitted in the outer joint part to support the tripod arms, with each tripod arm guided by two roller bearing assemblies. Each roller bearing assembly has a bearing shell, which receives the tripod arm, rolling members fitted with clearance in a cage and disposed between the track of the outer joint part and a contact surface of the bearing shell. The cage is guided by shoulders of the outer joint part, which laterally bound the track, wherein the cage has opposite collars in parallel relationship to the shoulders for providing an axial stop for the rolling members and the bearing shell.
    Type: Application
    Filed: June 2, 2003
    Publication date: February 26, 2004
    Applicant: INA-SCHAEFFLER KG, Herzogenaurach, Germany
    Inventors: Piotr Olszewski, Siegfried Tisch, Martin Kruppa, Wolfgang Fugel
  • Patent number: RE46845
    Abstract: A radial bearing (1a, 1b, 1c, 1d), especially a roller bearing (9) comprising an outer part (3) opposite an inner part (6), which rotate relative to each other about a common longitudinal axis (5) is provided, wherein the radial bearing (1a, 1b, 1c, 1d) includes a bearing seat (8a, 8b, 8c, 8d), which is formed in the outer part (3) or on the inner part (6) and which is generally stationary relative to a radial load (10a, 10b, 10c, 10d) acting on the bearing seat (8a, 8b, 8c, 8d) in a load zone (12a, 12b, 12c, 12d). The bearing seat (8a, 8b, 8c, 8d) features a variable width over its extent in a direction of the longitudinal axis (5), such that, starting from the load zone (12a, 12b, 12c, 12d), the bearing seat (8a, 8b, 8c, 8d) is significantly narrowed outside of the load zone (12a, 12b, 12c, 12d).
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: May 15, 2018
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Siegfried Tisch, Peter Solfrank