Patents by Inventor Mark A. Danielson

Mark A. Danielson 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).

  • Extreme cold logic limiting shifts to first and third speeds
    Patent number: 6024668
    Abstract: An automatic transmission control system is provided with extreme cold logic wherein when the transmission oil temperature is below a predetermined temperature so as to cause the transmission oil to have extremely viscus characteristics, the transmission prevents faulty shifting by limiting shifts between first and third gears. The first gear is obtained by application of a single hydraulically controlled clutch element in combination with a freewheel clutch element while the third gear operation can be obtained by engagement of a second clutch element in combination with the first clutch element. Since the shift between first and third gears only requires the application of the second clutch element in combination with the already engaged first clutch element, there is no risk of torque overlap between elements.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: February 15, 2000
    Assignee: Daimlerchrysler Corporation
    Inventors: Gerald L. Holbrook, Hussein A. Dourra, Mark A. Danielson