B - Operations – Transporting – 60 – R
Patent
B - Operations, Transporting
60
R
B60R 1/06 (2006.01) B60R 1/02 (2006.01)
Patent
CA 2175140
An automatic mirror positioning system is intended for tractor-trailer vehicles such as a tractor provided with a semi-trailer. The tractor includes a fifth wheel used to couple the trailer to the tractor. The system comprises an angle detection unit to measure a relative angular pivot between the tractor and the trailer, a computer for interpreting data received from the detection unit, and a mirror assembly which includes a rotatable mirror which is operated by the signals received from the computer, whereby the system modifies the positions of the exterior rearview mirrors of the tractor in view of the relative position of the tractor and the trailer in order that the driver can view the sides and the rear corners of the trailer for any angle defined between the tractor and the trailer. The detection unit which is installed adjacent the fifth wheel comprises a pair of spring- biased vertical discs which contact the underside of the trailer so as to rotate whenever there is a relative angular pivot between the tractor and the trailer. As these discs are mounted on the shaft of a step motor, any rotation of the discs will cause the step motor to rotate and to transmit direction and displacement impulses to the computer which after processing the data on the basis of other known parameters will cause the step motor of each mirror assembly to rotate in an established direction and for a calculated angle the respective mirror thereof.
Mandeville Eric
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Rouleau Jean
LandOfFree
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