Patents Assigned to J. P. Hennessy
  • Method and apparatus for providing runout compensation
    Patent number: 4953296
    Abstract: A wheel alignment system includes a gauge head which is adapted to be pendulously mounted to a wheel to be aligned for free rotation about an axis which is coaxial with the axis of rotation of the wheel. The gauge head carries a plurality of level sensors, which are coupled to a microprocessor, and an encoder which is mounted between a shaft, that is mounted to the wheel for rotation therewith, and the gauge head to transmit to said microprocessor signals representative of the angular position of said wheel.
    Type: Grant
    Filed: August 24, 1989
    Date of Patent: September 4, 1990
    Assignee: J. P. Hennessy
    Inventor: Phillip A. Spainhour