Patent ID: 6226879
Filing Date: 2001-05-08
Classification: G01B,Y10S

Abstract:
A device for establishing a reference datum of a wheeled vehicle, said apparatus comprising:a first element adapted to be operably rotatably mounted to a hub of an axle of the vehicle, said first element having a first axis of rotation;a second element having one end rotatably mounted to said first element so as to have a second axis of rotation perpendicular to said first axis of rotation of said first element; anda laser mounted to the other end of said second element, said laser being oriented relative to said second element so as to project a laser plane at least one of: i) parallel to a longitudinal axis of said second element to thereby establish a vertical datum for the vehicle, and ii) perpendicular to the longitudinal axis of said second element to thereby establish a horizontal datum for the vehicle.