Patents by Inventor Thomas D. Buchanan

Thomas D. Buchanan 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).

  • Automatic transmission control system and method
    Patent number: 5382202
    Abstract: An control system and method for an automatic transmission are disclosed which are adapted to shift or actuate the gears of the transmission without engine vacuum assistance. A control valve is provided which is variably positionable in response to a pressure signal from a governor to select control positions controlling the flow of hydraulic fluid to the gear shift elements of the transmission. The control valve is biased at a first select control position and is movable in response to the pressure signal from the governor to a second select control position for providing hydraulic fluid to the gear shift elements at a pressure effective for actuating the elements at a preselect vehicle speed. An adjustable position delimiter maintains the control valve at the second preselect control position.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: January 17, 1995
    Assignee: Barney & White Auto Parts, Inc.
    Inventors: Jeffrey A. Solove, Thomas D. Buchanan, Richard L. Irvin, Terry R. Toops