Patents by Inventor John R. Boldt

John R. Boldt 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).

  • Automotive diagnostic service tool with hand held tool and master controller
    Patent number: 6181992
    Abstract: The present invention relates to a system and method for diagnosing and isolating problems and for monitoring operting conditions on an automobile. The system includes a hand held unit and a master station which can operate alone or in unison to accomplish functions such as logging and displaying data on a real-time basis, logging data remotely and displaying the data at a later time, diagnosing fault conditions, monitoring operating parameters, reprogramming on-board vehicle controllers, displaying service manual and service bulletin pages and ordering parts on-line.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: January 30, 2001
    Assignee: Chrysler Corporation
    Inventors: Krzysztof Gurne, Raymond J. Williams, John R. Boldt, Robert L. Barker, Gregory J. Broniak, Daniel J. Marus
  • Method for diagnosing a torque converter's lock-up mechanism
    Patent number: 5609550
    Abstract: A method of diagnosing a lock-up mechanism for a torque converter in an automatic transmission of an automotive vehicle includes the steps of sensing vehicle speed and engine speed, calculating a vehicle speed to engine speed ratio based on the sensed vehicle speed and engine speed, knowing when the torque converter transitions between unlock and lock are initiated, determining whether the calculated ratio is greater than a predetermined threshold when the torque converter transitions between unlock and lock, and concluding that a failure of the lock-up mechanism has occurred if the calculated ratio is not greater than the predetermined threshold within a predetermined time since transition of the torque converter.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: March 11, 1997
    Assignee: Chrysler Corporation
    Inventors: Rajiv Saxena, John R. Boldt, Samuel Campbell, III, Himshweta R. Amin, William O. Robinson
  • Circuit and method for interfacing vehicle controller and diagnostic test instrument
    Patent number: 5555498
    Abstract: An adapter which permits the use of present diagnostic tools with newer ISO9141 equipped engine and transmission controllers. The adapter facilitates bi-directional communication while conditioning the signals entering and exiting the adapter and allow the diagnostic tools to operate transparent of the adapter's presence.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: September 10, 1996
    Assignee: Chrysler Corporation
    Inventors: Charles J. Berra, John R. Boldt, Alan J. Amici, Joseph J. Krebs
  • Hand held automotive diagnostic service tool
    Patent number: 5541840
    Abstract: The present invention relates to a system and method for diagnosing and isolating problems and for monitoring operting conditions on an automobile. The system includes a hand held unit and a master station which can operate alone or in unison to accomplish functions such as logging and displaying data on a real-time basis, logging data remotely and displaying the data at a later time, diagnosing fault conditions, monitoring operating parameters, reprogramming on-board vehicle controllers, displaying service manual and service bulletin pages and ordering parts on-line.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: July 30, 1996
    Assignee: Chrysler Corporation
    Inventors: Krzysztof Gurne, Raymond J. Williams, John R. Boldt, Robert L. Barker, Gregory J. Broniak, Daniel J. Marus