Optical: systems and elements – Protection from moisture or foreign particle – Fluid directed across optical element
Patent
1991-06-14
1993-01-12
Arnold, Bruce Y.
Optical: systems and elements
Protection from moisture or foreign particle
Fluid directed across optical element
359507, 359871, G02B 718
Patent
active
051794705
ABSTRACT:
An aerodynamic vehicle side mirror head of the vertically elongated rectangular type commonly used on large vehicles such as trucks includes an aerodynamically shaped mirror housing having a reflecting surface mounted to a rearward facing surface thereof and a set of cambered, airfoil-shaped, turning vanes with an upstream vane located along the leading vertical edge of the mirror housing on the side thereof closest to the vehicle can and having an outlet disposed to direct airflow exiting therefrom laterally onto the mirror surface and a downstream vane located along the trailing vertical edge on the opposite side of the mirror housing and having an outlet disposed to direct air flowing therethrough in a substantially downstream direction. The vanes are shaped and geometrically optimized relative to the mirror housing surface to significantly reduce the size of the downstream wake, effectively reducing the aerodynamic drag of the mirror head, and at the same time, causing scrubbing of the downstream face of the mirror, effectively keeping it free of water droplets and dirt.
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Arnold Bruce Y.
Navistar International Transportation Corp.
Ryan J. P.
Sullivan Dennis K.
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