Patents by Inventor Richard E. Spring

Richard E. Spring 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).

  • Powertrain performance assessment system
    Patent number: 5109696
    Abstract: An apparatus is adapted to assess the performance of a vehicle's powertrain. A microcomputer collects sensor data indicative of the rotational velocity of an output shaft and a transmission input shaft and of the pressure of a directional clutch and a speed clutch. The microcomputer calculates a set of powertrain parameters based on the collected sensor data and produces an error signal in response to predetermined conditions of the powertrain parameters.
    Type: Grant
    Filed: September 6, 1990
    Date of Patent: May 5, 1992
    Assignee: Caterpillar Inc.
    Inventors: Irving Bright, Ronald C. Erickson, Dennis K. Greene, Gerald D. Hardy, Robert E. Hefner, Lowell E. Johnson, Donald J. Schwingel, Richard E. Spring