Patents by Inventor Anthony Robert Sayman

Anthony Robert Sayman 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).

  • Method for controlling and regulating a transmission brake in an automatic motor vehicle transmission
    Patent number: 7370548
    Abstract: A method for the control and regulation of a transmission brake in an automatic transmission with a countershaft. The transmission brake arrests a transmission input shaft or a countershaft during an upshifting procedure. The speed of rotation (1) of these shafts at the engagement point in time corresponds to the synchronous speed of rotation already established by the transmission output speed of rotation and the ratio of the selected gear stage or approaches this value up to a predetermined tolerance of deviation. The disengagement point in time for the transmission brake is calculated with the aid of the brake rate of change of the countershaft, i.e., the transmission input speed of rotation as well as with the rate of change of the transmission output shaft speed of rotation. The transmission brake is further provided with disengagement, given consideration of lead time, before the calculated disengagement point in time.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: May 13, 2008
    Assignee: ZF Friedrichshafen AG
    Inventors: Volker Bachmann, Mario Steinborn, Rudolf Kalthoff, Anthony Robert Sayman