Patents by Inventor Brent G. Drews

Brent G. Drews 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).

  • System for controlling a transmission
    Patent number: 9102312
    Abstract: A system for shifting a transmission includes an off-going clutch, an on-coming clutch, and an assisting clutch. A controller is configured to increase an amount of torque carried by each of the on-coming clutch and the assisting clutch. The controller is further configured to reduce an amount of torque carried by the off-going clutch and, after the off-going clutch is disengaged, to reduce the amount of torque carried by the assisting clutch.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: August 11, 2015
    Assignee: Caterpillar Inc.
    Inventors: Timothy A. Lorentz, Hoon Lee, Brent G. Drews
  • System for Controlling a Transmission
    Publication number: 20140364274
    Abstract: A system for shifting a transmission includes an off-going clutch, an on-coming clutch, and an assisting clutch. A controller is configured to increase an amount of torque carried by each of the on-coming clutch and the assisting clutch. The controller is further configured to reduce an amount of torque carried by the off-going clutch and, after the off-going clutch is disengaged, to reduce the amount of torque carried by the assisting clutch.
    Type: Application
    Filed: June 7, 2013
    Publication date: December 11, 2014
    Inventors: Timothy A. Lorentz, Hoon Lee, Brent G. Drews