Patents by Inventor Patrick Lardy

Patrick Lardy 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).

  • Control device and control process for an infinitely variable transmission
    Patent number: 5609544
    Abstract: A CVT is operated in both a continuously-variable mode and in a simulated stepped-ratio mode. In the stepped ratio mode, the highest preset transmission ratio (e.g., "first gear"), is variable and responsive to vehicle driving conditions. A control senses a low vehicle speed operating condition and adapts the highest ratio to reduce the step up to the next preset ratio. The control also senses a vehicle start condition and adapts the highest ratio to the current engine torque to improve drivability.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: March 11, 1997
    Assignee: Dr. Ing. h.c.F. Porsche AG
    Inventors: Patrick Lardy, Joseph Petersmann