Patents by Inventor David E. Earhart

David E. Earhart 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: 10808807
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes or three clutches and three brakes.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: October 20, 2020
    Assignee: Allison Transmission, Inc.
    Inventors: Brian Schoolcraft, David E. Earhart, Eric S. Tryon
  • Patent number: 10704655
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes or three clutches and three brakes.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: July 7, 2020
    Assignee: Allison Transmission, Inc.
    Inventors: Brian Schoolcraft, David E. Earhart, Eric S. Tryon
  • Publication number: 20190390746
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes or three clutches and three brakes.
    Type: Application
    Filed: September 3, 2019
    Publication date: December 26, 2019
    Inventors: Brian Schoolcraft, David E. Earhart, Eric S. Tryon
  • Publication number: 20190390747
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes or three clutches and three brakes.
    Type: Application
    Filed: September 3, 2019
    Publication date: December 26, 2019
    Inventors: Brian Schoolcraft, David E. Earhart, Eric S. Tryon
  • Patent number: 10473190
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes or three clutches and three brakes.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: November 12, 2019
    Assignee: Allison Transmission, Inc.
    Inventors: Brian Schoolcraft, David E. Earhart, Eric S. Tryon
  • Patent number: 10323723
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include three clutches and three brakes.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: June 18, 2019
    Assignee: Allison Transmission, Inc.
    Inventors: David E. Earhart, Drew A. Crafton, Jezrah Horen
  • Patent number: 10234001
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: March 19, 2019
    Assignee: Allison Transmission, Inc.
    Inventors: David E. Earhart, James Raszkowski, Jezrah Horen
  • Patent number: 10161484
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: December 25, 2018
    Assignee: Allison Transmission, Inc.
    Inventors: Eric S. Tryon, David E. Earhart
  • Publication number: 20180087614
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include three clutches and three brakes.
    Type: Application
    Filed: September 28, 2016
    Publication date: March 29, 2018
    Inventors: Douglas S. Burchett, David E. Earhart
  • Publication number: 20180087619
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include three clutches and three brakes.
    Type: Application
    Filed: March 28, 2017
    Publication date: March 29, 2018
    Inventors: David E. Earhart, Drew A. Crafton, Jezrah Horen
  • Publication number: 20180087613
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes.
    Type: Application
    Filed: September 28, 2016
    Publication date: March 29, 2018
    Inventors: David E. Earhart, James Raszkowski, Jezrah Horen
  • Publication number: 20180087607
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes.
    Type: Application
    Filed: September 28, 2016
    Publication date: March 29, 2018
    Inventors: Eric S. Tryon, David E. Earhart
  • Publication number: 20180087624
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include four clutches and two brakes or three clutches and three brakes.
    Type: Application
    Filed: April 10, 2017
    Publication date: March 29, 2018
    Inventors: Brian Schoolcraft, David E. Earhart, Eric S. Tryon
  • Patent number: 9927008
    Abstract: A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include three clutches and three brakes.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: March 27, 2018
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: Douglas S. Burchett, David E. Earhart
  • Patent number: 9746060
    Abstract: The present invention provides an infinitely variable transmission for a powered vehicle which includes a power source. The transmission includes an input shaft and an output shaft, the output shaft being spaced from the input shaft. The transmission further includes a variator coupled between the input shaft and output shaft. In addition, at least two planetary gearsets are disposed adjacent to the variator and an input coupler is configured to selectively couple the variator to the power source.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: August 29, 2017
    Assignee: Allison Transmission, Inc.
    Inventors: Glen S. Hawkins, Jr., Brian Schoolcraft, James A. Raszkowski, David E. Earhart, Gary Reichanadter
  • Patent number: 9664269
    Abstract: The present invention provides an infinitely variable transmission for a powered vehicle which includes a power source. The transmission includes an input shaft and an output shaft, the output shaft being spaced from the input shaft. The transmission further includes a variator coupled between the input shaft and output shaft. In addition, at least two planetary gearsets are disposed adjacent to the variator and an input coupler is configured to selectively couple the variator to the power source.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: May 30, 2017
    Assignee: Allison Transmissions, Inc.
    Inventors: Glen S. Hawkins, Jr., Brian Schoolcraft, James A. Raszkowski, David E. Earhart, Gary Reichanadter
  • Patent number: 9382987
    Abstract: The present invention provides an infinitely variable transmission for a powered vehicle which includes a power source. The transmission includes an input shaft and an output shaft, the output shaft being spaced from the input shaft. The transmission further includes a variator coupled between the input shaft and output shaft. In addition, at least two planetary gearsets are disposed adjacent to the variator and an input coupler is configured to selectively couple the variator to the power source.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: July 5, 2016
    Assignee: Allison Transmission, Inc.
    Inventors: Glen S. Hawkins, Jr., Brian Schoolcraft, James A. Raszkowski, David E. Earhart, Gary Reichanadter
  • Publication number: 20160109007
    Abstract: The present invention provides an infinitely variable transmission for a powered vehicle which includes a power source. The transmission includes an input shaft and an output shaft, the output shaft being spaced from the input shaft. The transmission further includes a variator coupled between the input shaft and output shaft. In addition, at least two planetary gearsets are disposed adjacent to the variator and an input coupler is configured to selectively couple the variator to the power source.
    Type: Application
    Filed: December 29, 2015
    Publication date: April 21, 2016
    Inventors: Glen S. Hawkins, JR., Brian Schoolcraft, James A. Raszkowski, David E. Earhart, Gary Reichanadter
  • Publication number: 20150240925
    Abstract: The present invention provides an infinitely variable transmission for a powered vehicle which includes a power source. The transmission includes an input shaft and an output shaft, the output shaft being spaced from the input shaft. The transmission further includes a variator coupled between the input shaft and output shaft. In addition, at least two planetary gearsets are disposed adjacent to the variator and an input coupler is configured to selectively couple the variator to the power source.
    Type: Application
    Filed: April 13, 2015
    Publication date: August 27, 2015
    Inventors: Glen S. Hawkins, JR., Brian Schoolcraft, James A. Raszkowski, David E. Earhart, Gary Reichanadter
  • Patent number: 9109663
    Abstract: The present invention provides an infinitely variable transmission for a powered vehicle which includes a power source. The transmission includes an input shaft and an output shaft, the output shaft being spaced from the input shaft. The transmission further includes a variator coupled between the input shaft and output shaft. In addition, at least two planetary gearsets are disposed adjacent to the variator and an input coupler is configured to selectively couple the variator to the power source.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: August 18, 2015
    Assignee: Allison Transmission, Inc.
    Inventors: Glen S. Hawkins, Jr., Brian Schoolcraft, James A. Raszkowski, David E. Earhart, Gary Reichanadter