Patents by Inventor Earl E. Duffey

Earl E. Duffey 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).

  • Manual transmission with a gearshift locking mechanism and method
    Patent number: 8783126
    Abstract: A manual transmission with a gearshift locking arrangement includes a rail having a shifter having a slot between forward and rear ears of the shifter, the rail being movable between rail forward and rear positions. The manual transmission with a gearshift locking arrangement also includes forward and rear engagement members disposed at positions corresponding to the rail forward and rear positions. A shift lever is also provided, an engaging portion of the shift lever being adapted to be disposed in the slot, the shift lever being adapted to move the rail between the rail forward and rear position, the engaging portion being engageable with the forward engagement member when the rail is in the rail forward position and the engaging portion being engageable with the rear engagement member when the rail is in the rail rear position.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: July 22, 2014
    Assignee: Mack Trucks, Inc.
    Inventors: Victor Kronstadt, Earl E. Duffey
  • MANUAL TRANSMISSION WITH A GEARSHIFT LOCKING MECHANISM AND METHOD
    Publication number: 20100000360
    Abstract: A manual transmission with a gearshift locking arrangement includes a rail having a shifter having a slot between forward and rear ears of the shifter, the rail being movable between rail forward and rear positions. The manual transmission with a gearshift locking arrangement also includes forward and rear engagement members disposed at positions corresponding to the rail forward and rear positions. A shift lever is also provided, an engaging portion of the shift lever being adapted to be disposed in the slot, the shift lever being adapted to move the rail between the rail forward and rear position, the engaging portion being engageable with the forward engagement member when the rail is in the rail forward position and the engaging portion being engageable with the rear engagement member when the rail is in the rail rear position.
    Type: Application
    Filed: September 1, 2006
    Publication date: January 7, 2010
    Inventors: Victor Kronstadt, Earl E. Duffey