Street sweeper pick-up head
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United States of America Patent
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Nov 24, 1998
Grant Date -
N/A
app pub date -
May 6, 1996
filing date -
May 6, 1996
priority date (Note) -
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Abstract
A street sweeper is provided including a vacuum pick-up head having a relatively low noise level and high sweeping efficiency resulting from the careful control of the velocity and direction of the air flow. In order to control the air flow, the internal contour of the pick-up head is optimized to accommodate the streamline flow pattern to minimize turbulence and boundary layer separation. The cross sectional area of the internal contour of the pick-up head is designed to be substantially constant or slightly converging. A support assembly for supporting a nozzle assembly is provided which minimizes damage to the pick-up head and minimizes infiltration into the pick-up head. A suction tube is also provided which minimizes the noise level and increases the efficiency of the pick-up head and the fan.
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