Patents by Inventor Brian Tooman

Brian Tooman 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: 8117935
    Abstract: A synchronizer actuating system with selectives for use in dual clutch transmission is provided. The synchronizer actuating system includes an apply finger and a fork mounted on a shift rail. The fork grips a synchronizer sleeve that supports a synchronizer. The synchronizer is moveable to a neutral position. A three area piston assembly is operable to engage and actuate the apply finger. The three area piston assembly includes a hydraulic neutral position. A selective element is coupled to the synchronizer actuating system to calibrate the hydraulic neutral position of the three area piston assembly to the neutral position of the synchronizer sleeve.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: February 21, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: John A. Diemer, Brian Tooman, Fredrik Englund, Robert Roessner, Henryk Sowul
  • Patent number: 8065930
    Abstract: The present invention provides a three position hydraulic piston assembly for a gear ratio change mechanism for a transmission exhibiting reduced gear shift noise. The three position hydraulic piston assembly includes a master piston and motion retarding assemblies that act near both travel limits of the master piston. The master piston includes symmetrical passageways that provide hydraulic fluid flow to small chambers at each end of the piston that are closed off as the piston approaches its travel limits. Hydraulic fluid trapped in the chambers decelerates the piston and is bled off through an orifice allowing the piston to reach its travel limit and quickly and quietly engage a gear ratio.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: November 29, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Henryk Sowul, Tejinder Singh, Brian W. Whitmarsh, Brian Tooman, James D. Hendrickson, Richard A. Pashnik
  • Publication number: 20090241714
    Abstract: The present invention provides a three position hydraulic piston assembly for a gear ratio change mechanism for a transmission exhibiting reduced gear shift noise. The three position hydraulic piston assembly includes a master piston and motion retarding assemblies that act near both travel limits of the master piston. The master piston includes symmetrical passageways that provide hydraulic fluid flow to small chambers at each end of the piston that are closed off as the piston approaches its travel limits. Hydraulic fluid trapped in the chambers decelerates the piston and is bled off through an orifice allowing the piston to reach its travel limit and quickly and quietly engage a gear ratio.
    Type: Application
    Filed: March 26, 2008
    Publication date: October 1, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC
    Inventors: HENRYK SOWUL, TEJINDER SINGH, BRIAN W. WHITMARSH, BRIAN TOOMAN, JAMES D. HENDRICKSON, RICHARD A. PASHNIK
  • Publication number: 20090031836
    Abstract: A synchronizer actuating system with selectives for use in dual clutch transmission is provided. The synchronizer actuating system includes an apply finger and a fork mounted on a shift rail. The fork grips a synchronizer sleeve that supports a synchronizer. The synchronizer is moveable to a neutral position. A three area piston assembly is operable to engage and actuate the apply finger. The three area piston assembly includes a hydraulic neutral position. A selective element is coupled to the synchronizer actuating system to calibrate the hydraulic neutral position of the three area piston assembly to the neutral position of the synchronizer sleeve.
    Type: Application
    Filed: July 16, 2008
    Publication date: February 5, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: John A. Diemer, Brian Tooman, Fredrik Englund, Robert Roessner, Henryk Sowul