Patents by Inventor Michael L. Holly

Michael L. Holly 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: 20200072305
    Abstract: A method for manufacturing a ferrous rotational member including the steps of turning a first portion of the friction surface at a sufficient feed rate to provide a first deformed layer on the first portion of the friction surface; fine turning a second portion of the friction surface at a sufficient feed rate to provide a second deformed layer on the second portion of the friction surface; burnishing the first and second portions of the friction surface to achieve a predetermined roughness; and nitrocarburizing the rotational member at a time and temperature sufficient for the diffusion of nitrogen atoms and carbon atoms through the deformed layer to form hardened casings having variable thickness. The ferrous rotational member may be that of a brake rotor having a hub surface and a friction surface, where the hub surface and friction surface have a variable thickness hardened casing.
    Type: Application
    Filed: July 11, 2019
    Publication date: March 5, 2020
    Inventors: Henry Zhan, Jianfeng Wang, Michael L. Holly, Mark T. Riefe
  • Patent number: 10378599
    Abstract: A brake rotor comprising a brake pad wear surface; a hat surface; and a decorative insert comprising an insert material, the decorative insert disposed on the brake pad wear surface, the hat surface, or both; wherein at least one of a friction coefficient between the decorative insert and a brake pad is substantially the same as a friction coefficient between the brake pad wear surface and the brake pad, a wear rate of the decorative insert is substantially the same as or greater than a wear rate of the brake pad wear surface, or a wear rate of the decorative insert is substantially the same as or greater than a wear rate of the hat surface; and at least a portion of the decorative insert is visible on the brake pad wear surface, the hat surface, or both.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: August 13, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Christopher J. Mettrick, Mark T. Riefe, Michael L. Holly, James A. Webster, Michael J. Walker, Anil K. Sachdev
  • Publication number: 20190211435
    Abstract: A number of variations may include a ferritic nitrocarburized part comprising steel, wherein the ferritic nitrocarburized steel has a tensile strength exceeding the parent steel material and sufficient ductility, bendability, and flangeability to support subsequent flanging and press-fitting of bushings. Exact strength increases and bendability will be dependent on exact process and alloy combinations.
    Type: Application
    Filed: January 10, 2018
    Publication date: July 11, 2019
    Inventors: Michael L. Holly, Dennis Deciechi, James J. Gentile, David M. Cummings, Charles M. Enloe
  • Publication number: 20190017161
    Abstract: A number of variations may include a ferritically nitrocarburized vehicle component comprising a compound zone and a friction surface at an outer edge of the compound zone wherein the friction surface is configured for engagement with a corresponding friction material, and wherein the compound zone comprises a nitride layer comprising epsilion iron nitride, Fe3N and gamma prime iron nitride Fe4N.
    Type: Application
    Filed: July 14, 2017
    Publication date: January 17, 2019
    Inventors: Michael L. Holly, Mark T. Riefe, Matthew A. Robere
  • Publication number: 20190011004
    Abstract: A brake rotor comprising a brake pad wear surface; a hat surface; and a decorative insert comprising an insert material, the decorative insert disposed on the brake pad wear surface, the hat surface, or both; wherein at least one of a friction coefficient between the decorative insert and a brake pad is substantially the same as a friction coefficient between the brake pad wear surface and the brake pad, a wear rate of the decorative insert is substantially the same as or greater than a wear rate of the brake pad wear surface, or a wear rate of the decorative insert is substantially the same as or greater than a wear rate of the hat surface; and at least a portion of the decorative insert is visible on the brake pad wear surface, the hat surface, or both.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 10, 2019
    Inventors: Christopher J. Mettrick, Mark T. Riefe, Michael L. Holly, James A. Webster, Michael J. Walker, Anil K. Sachdev
  • Patent number: 9758135
    Abstract: A ferritically nitrocarburized rotational member of a vehicle brake is disclosed, including a rotational member having a friction surface configured for braking engagement with a corresponding friction material. A compound zone is disposed at the friction surface. An exposed surface of the compound zone is exposed to an atmosphere. The area of the exposed surface includes from about 0 percent to about 14 percent graphite.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: September 12, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael D. Hanna, Michael L. Holly, Ronnie T. Brown, James A. Webster, Lisa G. Devoe, Donna Y. Sekulovski, Kee Hyuk Im
  • Patent number: 9651105
    Abstract: A number of variations may include a brake rotor having a surface oxide layer and methods of making the same.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: May 16, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael L. Holly, Douglas N. Reed
  • Publication number: 20170058982
    Abstract: A number of variations may include a product that may include at least one working friction surface that may include at least two layers that may include a compound layer and a nitrogen diffusion layer wherein the compound layer may have a porosity ranging from about 19% to about 50%.
    Type: Application
    Filed: August 26, 2015
    Publication date: March 2, 2017
    Inventors: MICHAEL L. HOLLY, MARK T. RIEFE, RICHARD A. KAATZ, CARA L. LEARMAN, DAVID B. ANTANAITIS, LISA G. DEVOE
  • Patent number: 9581211
    Abstract: One variation includes a friction material and method of manufacture thereof wherein the friction material includes a transfer layer on a ferritically nitrocarburized component, wherein the transfer layer may be fabricated from glass, rubber, carbon, aramid fiber, filler material, abrasive, or a high-temperature resin.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: February 28, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Michael L. Holly, David B. Antanaitis, Richard A. Kaatz, Mark T. Riefe, Cara L. Learman
  • Publication number: 20150159710
    Abstract: One variation includes a friction material and method of manufacture thereof wherein the friction material includes a transfer layer on a ferritically nitrocarburized component, wherein the transfer layer may be fabricated from glass, rubber, carbon, aramid fiber, filler material, abrasive, or a high-temperature resin.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 11, 2015
    Applicant: GM Global Technology Operations LLC
    Inventors: Michael L. Holly, David B. Antanaitis, Richard A. Kaatz, Mark T. Riefe, Cara L. Learman
  • Publication number: 20150129377
    Abstract: A method for improving corrosion resistance in FNC cast iron substrates without the need for additional coating or painting. The exemplary methods remove a portion of the FNC coating applied to a cast iron substrate, preferably through polishing, to expose the epsilon phase portion of the compound area. The epsilon phase portion is thought to provide improved corrosion protection as compared to non-polished FNC cast iron substrates. One exemplary product that may be provided with improved corrosion protection according to the above method is a brake rotor having a FNC treatment.
    Type: Application
    Filed: January 21, 2015
    Publication date: May 14, 2015
    Inventors: Michael D. Hanna, Michael L. Holly
  • Publication number: 20150096850
    Abstract: A ferritically nitrocarburized rotational member of a vehicle brake is disclosed, including a rotational member having a friction surface configured for braking engagement with a corresponding friction material. A compound zone is disposed at the friction surface. An exposed surface of the compound zone is exposed to an atmosphere. The area of the exposed surface includes from about 0 percent to about 14 percent graphite.
    Type: Application
    Filed: November 12, 2014
    Publication date: April 9, 2015
    Inventors: Michael D. Hanna, Michael L. Holly, Ronnie T. Brown, James A. Webster, Lisa G. Devoe, Donna Y. Sekulovski, Kee Hyuk Im
  • Patent number: 8698489
    Abstract: A wheel assembly for a non-driven wheel includes a rotating wheel hub with a shaft portion supporting a bearing inner race. A magnetic encoder is mounted for rotation with the shaft portion. A non-rotating component radially surrounds the shaft portion and has a bearing outer race. A cap is secured to the non-rotating component and covers the outer and inner races, the shaft portion and the magnetic encoder inboard of the races to seal an inboard side of the outer and inner races. A sensor is mounted to a non-rotating vehicle steering member externally to, not covered by, and not extending through the cap. The sensor is configured to deflect to be biased into continuous contact with an outer surface of the cap to read the magnetic encoder through the cap without extending through the cap.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: April 15, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Todd D. Albertson, Vincent R. Sicilia, Josef Mack, Phanu Amatyakul, William P. Job, Robert G. Sutherlin, Michael L. Holly, Douglas N. Reed
  • Publication number: 20130327604
    Abstract: A number of variations may include a brake rotor having a surface oxide layer and methods of making the same.
    Type: Application
    Filed: August 15, 2013
    Publication date: December 12, 2013
    Applicant: GM Global Technology Operations LLC
    Inventors: Michael L. Holly, Douglas N. Reed
  • Patent number: 8585833
    Abstract: Ferritic nitrocarburized surface treatment of cast iron brake rotors providing oxidation resistance, good braking performance and absence of distortion. Machined brake rotors are pre-heated, then immersed into a high temperature molten nitrocarburizing salt bath for a first predetermined dwell time. After removing the brake rotors from the nitrocarburizing salt bath, the brake rotors are directly immersed into an oxidizing salt bath at a lower temperature than the nitrocarburizing salt bath so that the brake rotors are thermally quenched. After a predetermined second dwell time in the oxidizing salt bath, the brake rotors are removed therefrom and further cooled to room temperature, either by water application thermal quenching or slow cooling in air. A fixture provides stable holding the brake rotors with a minimum of contact during placement in the salt baths.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: November 19, 2013
    Assignees: GM Global Technology Operations LLC, Kolene Corporation
    Inventors: Michael L. Holly, Douglas N. Reed, James R. Easterday
  • Publication number: 20130000787
    Abstract: Ferritic nitrocarburized surface treatment of cast iron brake rotors providing oxidation resistance, good braking performance and absence of distortion. Machined brake rotors are pre-heated, then immersed into a high temperature molten nitrocarburizing salt bath for a first predetermined dwell time. After removing the brake rotors from the nitrocarburizing salt bath, the brake rotors are directly immersed into an oxidizing salt bath at a lower temperature than the nitrocarburizing salt bath so that the brake rotors are thermally quenched. After a predetermined second dwell time in the oxidizing salt bath, the brake rotors are removed therefrom and further cooled to room temperature, either by water application thermal quenching or slow cooling in air. A fixture provides stable holding the brake rotors with a minimum of contact during placement in the salt baths.
    Type: Application
    Filed: September 12, 2012
    Publication date: January 3, 2013
    Applicants: KOLENE CORPORATION, GM Global Technology Operations LLC
    Inventors: Michael L. Holly, Douglas N. Reed, James R. Easterday
  • Patent number: 8287667
    Abstract: Ferritic nitrocarburized surface treatment of cast iron brake rotors providing oxidation resistance, good braking performance and absence of distortion. Machined brake rotors are pre-heated, then immersed into a high temperature molten nitrocarburizing salt bath for a first predetermined dwell time. After removing the brake rotors from the nitrocarburizing salt bath, the brake rotors are directly immersed into an oxidizing salt bath at a lower temperature than the nitrocarburizing salt bath so that the brake rotors are thermally quenched. After a predetermined second dwell time in the oxidizing salt bath, the brake rotors are removed therefrom and further cooled to room temperature, either by water application thermal quenching or slow cooling in air. A fixture provides stable holding the brake rotors with a minimum of contact during placement in the salt baths.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: October 16, 2012
    Assignees: GM Global Technology Operations LLC, Kolene Corporation
    Inventors: Michael L. Holly, Douglas N. Reed, James R. Easterday
  • Publication number: 20110297495
    Abstract: A ferritically nitrocarburized rotational member of a vehicle brake is disclosed, including a rotational member having a friction surface configured for braking engagement with a corresponding friction material. A compound zone is disposed at the friction surface. An exposed surface of the compound zone is exposed to an atmosphere. The area of the exposed surface includes from about 0 percent to about 14 percent graphite.
    Type: Application
    Filed: June 3, 2010
    Publication date: December 8, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Michael D. Hanna, Michael L. Holly, Ronnie T. Brown, James A. Webster, Lisa G. Devoe, Donna Y. Sekulovski, Kee Hyuk Im
  • Publication number: 20110181102
    Abstract: A wheel assembly for a non-driven wheel includes a rotating wheel hub with a shaft portion supporting a bearing inner race. A magnetic encoder is mounted for rotation with the shaft portion. A non-rotating component radially surrounds the shaft portion and has a bearing outer race. A cap is secured to the non-rotating component and covers the outer and inner races, the shaft portion and the magnetic encoder inboard of the races to seal an inboard side of the outer and inner races. A sensor is mounted to a non-rotating vehicle steering member externally to, not covered by, and not extending through the cap. The sensor is configured to deflect to be biased into continuous contact with an outer surface of the cap to read the magnetic encoder through the cap without extending through the cap.
    Type: Application
    Filed: November 22, 2010
    Publication date: July 28, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Todd D. Albertson, Vincent R. Sicilia, Josef Mack, Phanu Amatyakul, William P. Job, Robert G. Sutherlin, Michael L. Holly, Douglas N. Reed
  • Publication number: 20110151238
    Abstract: A method of forming a low-friction coating on a metal substrate includes ferritic nitrocarburizing the metal substrate to form a surface of the metal substrate, wherein the surface includes a compound zone and a diffusion zone disposed subjacent to the compound zone. After ferritic nitrocarburizing, the method includes oxidizing the compound zone to form a porous portion defining a plurality of pores, and, after oxidizing, coating the porous portion with polytetrafluoroethylene. The method further includes, after coating, curing the polytetrafluoroethylene to thereby form the low-friction coating. A low-friction coating system includes the metal substrate having the surface including the compound zone and the diffusion zone disposed subjacent said compound zone, wherein said compound zone includes the porous portion defining the pores, and a cured film formed from polytetrafluoroethylene disposed sufficiently on the porous portion so as to at least partially fill at least one of the plurality of pores.
    Type: Application
    Filed: December 17, 2009
    Publication date: June 23, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Michael L. Holly, Sumie S. Thaker, Brian K. Bartnick, Casimir S. Jaworowicz, Robert G. Sutherlin, Douglas N. Reed