Geometrical instruments – Straight-line light ray type – Structurally installed
Reexamination Certificate
2005-11-16
2008-08-26
Bennett, G. Bradley (Department: 2841)
Geometrical instruments
Straight-line light ray type
Structurally installed
C033S203180, C340S438000, C340S686200
Reexamination Certificate
active
07415771
ABSTRACT:
A method and apparatus that remains onboard a tractor and semi trailer vehicle for readily providing axle alignment instruction to an operator. The apparatus includes at least one indicator (28) for detecting an axle's thrust line relative to the vehicle's centerline. At least one sensor (40) for detecting the position of indicator (28) relative to the position of sensor (40). Upon axle deviation, indicator (28) position changes relative to sensor (40). Sensor (40) detect the change in the position of indicator (28). At least one signal is generated and transmitted to at least one receiver (68). Receiver (68) communicates the relation between indicator (28) and sensor (40) as alignment instruction of a particular axle (front or rear), particular side (left or right), particular direction in which to realign the axle (forward or rearward), and concludes when the axle's alignment is correct.
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