Patents by Inventor C. David Bradley

C. David Bradley 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).

  • Transmission range shift control with neutral position lock
    Patent number: 7861612
    Abstract: A range selection control system for a transmission facilitates safe operation of a power take off. A fluid actuated range piston assembly within a range cylinder moves between low range and high range positions. Range cylinder and range piston assembly define sealed high range and low range chambers. A neutral cylinder intersects range cylinder. A fluid actuated neutral piston assembly within neutral cylinder defines a neutral chamber. Neutral piston assembly engages range control piston assembly responsive to pressurization of neutral chamber. Neutral piston assembly is received by an engagement feature of range piston assembly when range control piston assembly is in a neutral position, retaining range piston assembly there. An electrically responsive locking mechanism locks neutral piston assembly in place when range piston assembly is in the neutral position. The locking is controlled by a condition of an electrical switch indicating a transmission condition.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: January 4, 2011
    Assignee: Eaton Corporation
    Inventors: Kuan-Jen Jeng, Mark A. Hirsch, Thomas N. Riley, C. David Bradley
  • Transmission range shift control with neutral position lock
    Publication number: 20080236322
    Abstract: A range selection control system for a transmission facilitates safe operation of a power take off. A fluid actuated range piston assembly within a range cylinder moves between low range and high range positions. Range cylinder and range piston assembly define sealed high range and low range chambers. A neutral cylinder intersects range cylinder. A fluid actuated neutral piston assembly within neutral cylinder defines a neutral chamber. Neutral piston assembly engages range control piston assembly responsive to pressurization of neutral chamber. Neutral piston assembly is received by an engagement feature of range piston assembly when range control piston assembly is in a neutral position, retaining range piston assembly there. An electrically responsive locking mechanism locks neutral piston assembly in place when range piston assembly is in the neutral position. The locking is controlled by a condition of an electrical switch indicating a transmission condition.
    Type: Application
    Filed: April 2, 2007
    Publication date: October 2, 2008
    Applicant: Eaton Corporation
    Inventors: Kuan-Jen Jeng, Mark A. Hirsch, Thomas N. Riley, C. David Bradley