Patents by Inventor Leroy K. Johnson

Leroy K. Johnson 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).

  • Integrated transmission and auxiliary gearbox control
    Patent number: 9644734
    Abstract: A powertrain of a vehicle has a drive unit, a transmission and an auxiliary gearbox. Operation of the transmission and the auxiliary gearbox is controlled by a transmission control unit. The transmission control unit controls shifting of the auxiliary gearbox and the transmission while the vehicle is in operation. The auxiliary gearbox may be electronically shifted, independently of activity of the vehicle operator.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: May 9, 2017
    Assignee: Allison Transmission, Inc.
    Inventors: Bruce Faucett, Robert F. Combs, Leroy K. Johnson
  • INTEGRATED TRANSMISSION AND AUXILIARY GEARBOX CONTROL
    Publication number: 20150032348
    Abstract: A powertrain of a vehicle has a drive unit, a transmission and an auxiliary gearbox. Operation of the transmission and the auxiliary gearbox is controlled by a transmission control unit. The transmission control unit controls shifting of the auxiliary gearbox and the transmission while the vehicle is in operation. The auxiliary gearbox may be electronically shifted, independently of activity of the vehicle operator.
    Type: Application
    Filed: October 14, 2014
    Publication date: January 29, 2015
    Inventors: Bruce Faucett, Robert F. Combs, Leroy K. Johnson
  • Integrated transmission and auxiliary gearbox control
    Patent number: 8862349
    Abstract: A powertrain of a vehicle has a drive unit, a transmission and an auxiliary gearbox. Operation of the transmission and the auxiliary gearbox is controlled by a transmission control unit. The transmission control unit controls shifting of the auxiliary gearbox and the transmission while the vehicle is in operation. The auxiliary gearbox may be electronically shifted, independently of activity of the vehicle operator.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: October 14, 2014
    Assignee: Allison Transmission, Inc.
    Inventors: Bruce Faucett, Robert F. Combs, Leroy K. Johnson
  • INTEGRATED TRANSMISSION AND AUXILIARY GEARBOX CONTROL
    Publication number: 20110224877
    Abstract: A powertrain of a vehicle has a drive unit, a transmission and an auxiliary gearbox. Operation of the transmission and the auxiliary gearbox is controlled by a transmission control unit. The transmission control unit controls shifting of the auxiliary gearbox and the transmission while the vehicle is in operation. The auxiliary gearbox may be electronically shifted, independently of activity of the vehicle operator.
    Type: Application
    Filed: November 2, 2010
    Publication date: September 15, 2011
    Inventors: Bruce Faucett, Robert F. Combs, Leroy K. Johnson
  • Powertrain with torque converter-mounted generator for multiple voltage electrical power and method for assembling same
    Patent number: 7863764
    Abstract: A torque converter-mounted generator is provided that, along with power electronics, offers at least two types of electrical power output and may be attached to a transmission without impacting the axial length of a powertrain in comparison to a powertrain with an identical transmission and a torque converter not having a generator mounted thereto. Different torque-converter mounted generators and power electronics configurations providing different combinations of electrical power voltages may be offered for use with a given transmission type, thus allowing flexibility in meeting customer needs without unduly impacting assembly of the powertrains. A method of assembling transmissions is also provided.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: January 4, 2011
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Robert Franklin Combs, David J. Sagers, Leroy K. Johnson
  • Powertrain with Torque Converter-Mounted Generator for Multiple Voltage Electrical Power and Method for Assembling Same
    Publication number: 20090071784
    Abstract: A torque converter-mounted generator is provided that, along with power electronics, offers at least two types of electrical power output and may be attached to a transmission without impacting the axial length of a powertrain in comparison to a powertrain with an identical transmission and a torque converter not having a generator mounted thereto. Different torque-converter mounted generators and power electronics configurations providing different combinations of electrical power voltages may be offered for use with a given transmission type, thus allowing flexibility in meeting customer needs without unduly impacting assembly of the powertrains. A method of assembling transmissions is also provided.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 19, 2009
    Applicant: GENERAL MOTORS CORPORATION
    Inventors: Robert Franklin Combs, David J. Sagers, Leroy K. Johnson