Patents by Inventor David P. Holm
David P. Holm 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: 11939010Abstract: A method for vehicle stabilization includes, in response to a determination that a fault occurred in a rear steering mechanism, identifying a fault type associated with the fault. The method also includes determining whether a position of a rack of the rear steering mechanism is controllable based on the fault type. The method also includes, in response to a determination that the position of the rack is controllable, selectively positioning the rack to a center position and holding, using a motor control system of the rear steering mechanism, the rack in the center position. The method also includes, in response to a determination that the position of the rack is not controllable, holding, using the motor control system of the rear steering mechanism, the rack in a current position.Type: GrantFiled: December 10, 2019Date of Patent: March 26, 2024Assignee: Steering Solutions IP Holding CorporationInventors: Prerit Pramod, Michael A Eickholt, David P. Holm, Rakesh Mitra
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Patent number: 11697452Abstract: A method includes determining whether a multiphase electric machine is unstable. The method also includes, in response to a determination that the multiphase electric machine is unstable, setting a gate voltage of a first three terminal semiconductor switch to zero. The method also includes, in response to a determination that the multiphase electric machine is stable, setting the gate voltage of the first three terminal semiconductor switch to nonzero. The method also includes, in response to the first three terminal semiconductor switch being set to zero, increasing electrical conduction from one phase of the multiphase electric machine to another phase of the multiphase electric machine. The method includes, in response to the first three terminal semiconductor switch being set to nonzero, increasing electrical resistance from the one phase of the multiphase electric machine to the another phase of the multiphase electric machine.Type: GrantFiled: February 7, 2020Date of Patent: July 11, 2023Assignee: Steering Solutions IP Holding CorporationInventors: Paul M. Fisher, David P. Holm
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Patent number: 11285991Abstract: An electromagnetic damping system for a steering system includes a pinion gear having a pinion shaft and engaged with a steering rack. The electromagnetic damping system also includes a friction disk operatively coupled to the pinion shaft. The electromagnetic damping system further includes an electromagnetic clutch located adjacent the friction disk, the electromagnetic clutch disposed in a spaced position relative to the friction disk in a first condition of the electromagnetic clutch, the electromagnetic clutch disposed in a contact position relative to the friction disk in a second condition of the electromagnetic clutch to damp the rate of movement of the steering rack.Type: GrantFiled: July 22, 2019Date of Patent: March 29, 2022Assignee: Steering Solutions IP Holding CorporationInventor: David P. Holm
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Publication number: 20210024124Abstract: An electromagnetic damping system for a steering system includes a pinion gear having a pinion shaft and engaged with a steering rack. The electromagnetic damping system also includes a friction disk operatively coupled to the pinion shaft. The electromagnetic damping system further includes an electromagnetic clutch located adjacent the friction disk, the electromagnetic clutch disposed in a spaced position relative to the friction disk in a first condition of the electromagnetic clutch, the electromagnetic clutch disposed in a contact position relative to the friction disk in a second condition of the electromagnetic clutch to damp the rate of movement of the steering rack.Type: ApplicationFiled: July 22, 2019Publication date: January 28, 2021Inventor: David P. Holm
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Publication number: 20200353976Abstract: A method for vehicle stabilization includes, in response to a determination that a fault occurred in a rear steering mechanism, identifying a fault type associated with the fault. The method also includes determining whether a position of a rack of the rear steering mechanism is controllable based on the fault type. The method also includes, in response to a determination that the position of the rack is controllable, selectively positioning the rack to a center position and holding, using a motor control system of the rear steering mechanism, the rack in the center position. The method also includes, in response to a determination that the position of the rack is not controllable, holding, using the motor control system of the rear steering mechanism, the rack in a current position.Type: ApplicationFiled: December 10, 2019Publication date: November 12, 2020Inventors: Prerit Pramod, Michael A. Eickholt, David P. Holm, Rakesh Mitra
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Publication number: 20200256421Abstract: A method includes determining whether a multiphase electric machine is unstable. The method also includes, in response to a determination that the multiphase electric machine is unstable, setting a gate voltage of a first three terminal semiconductor switch to zero. The method also includes, in response to a determination that the multiphase electric machine is stable, setting the gate voltage of the first three terminal semiconductor switch to nonzero. The method also includes, in response to the first three terminal semiconductor switch being set to zero, increasing electrical conduction from one phase of the multiphase electric machine to another phase of the multiphase electric machine. The method includes, in response to the first three terminal semiconductor switch being set to nonzero, increasing electrical resistance from the one phase of the multiphase electric machine to the another phase of the multiphase electric machine.Type: ApplicationFiled: February 7, 2020Publication date: August 13, 2020Inventors: Paul M. Fisher, David P. Holm
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Patent number: 9873454Abstract: A ball-screw assembly isolator is provided and includes a housing, a ball-screw, a ball-screw nut, a bearing assembly, a retaining member, a second retaining member, a first compressible member and a second compressible member. The bearing assembly is located between the housing and the ball-screw. The bearing assembly includes an inner race and an outer race. The retaining member is secured by the housing. The second retaining member is secured to the ball-screw nut. The first compressible member positioned between the housing and the outer race. The second compressible member is positioned between the outer race and the retaining member. The retaining member is configured to be preloaded to exert an axial force upon the first compressible member and the second compressible member.Type: GrantFiled: March 26, 2015Date of Patent: January 23, 2018Assignee: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: George E. Arlt, David P. Holm, Troy P. Strieter, James J. Shavrnoch, Bryan G. Freed
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Publication number: 20150197280Abstract: A ball-screw assembly isolator is provided and includes a housing, a ball-screw, a ball-screw nut, a bearing assembly, a retaining member, a second retaining member, a first compressible member and a second compressible member. The bearing assembly is located between the housing and the ball-screw. The bearing assembly includes an inner race and an outer race. The retaining member is secured by the housing. The second retaining member is secured to the ball-screw nut. The first compressible member positioned between the housing and the outer race. The second compressible member is positioned between the outer race and the retaining member. The retaining member is configured to be preloaded to exert an axial force upon the first compressible member and the second compressible member.Type: ApplicationFiled: March 26, 2015Publication date: July 16, 2015Applicant: STEERING SOLUTIONS IP HOLDING CORPORATIONInventors: George E. Arlt, David P. Holm, Troy P. Strieter, James J. Shavrnoch, Bryan G. Freed
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Patent number: 9021910Abstract: A ball-screw assembly isolator is provided, and includes a housing; a ball-screw, a bearing assembly, a retaining member, a first compressible member and a second compressible member. The bearing assembly is located between the housing and the ball-screw. The bearing assembly includes an outer race. The retaining member is secured by the housing. The first compressible member is positioned between the housing and the outer race. The second compressible member is positioned between the outer race and the retaining member. The retaining member is configured to be preloaded to exert an axial force upon the first compressible member and the second compressible member.Type: GrantFiled: August 17, 2012Date of Patent: May 5, 2015Assignee: Steering Solutions IP Holding CorporationInventors: George E. Arlt, David P. Holm, Troy P. Strieter, James J. Shavrnoch, Bryan G. Freed
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Publication number: 20140047936Abstract: A ball-screw assembly isolator is provided, and includes a housing; a ball-screw, a bearing assembly, a retaining member, a first compressible member and a second compressible member. The bearing assembly is located between the housing and the ball-screw. The bearing assembly includes an outer race. The retaining member is secured by the housing. The first compressible member is positioned between the housing and the outer race. The second compressible member is positioned between the outer race and the retaining member. The retaining member is configured to be preloaded to exert an axial force upon the first compressible member and the second compressible member.Type: ApplicationFiled: August 17, 2012Publication date: February 20, 2014Applicant: Steering Solutions IP Holding CorporationInventors: George E. Arlt, David P. Holm, Troy P. Strieter, James J. Shavrnoch, Bryan G. Freed