| 摘要 |
<p>A vehicle roof bar has a moulded plastics sleeve (28) of aerofoil shape in cross section covering a steel C-shaped channel. The sleeve is held in a nose down attitude and has upper and lower rearward facing steps (30-31) at its nose so as to create rolling turbulence and thereby reduce wind noise. The aerofoil shape of the sleeve is maintained across the slot in the channel by a ridge (39) on a hollow compressible tubular infill member (38). The roof bar is clamped on to the vehicle roof with the aid of over-centre clamping arms which tension the clamps and are held in place (when is their down and secured position) by lockable covers.</p> |
