Street sweeper
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Image:Street sweeping machine.jpg
A Sstreet sweeper is a person or machine that cleans streets, usually in an urban area. The first street sweeper invented could be the one by John Murphy of Elgin, Illinois in 1914. But other sources point to Charles Brooks of Newark, New Jersey, who acquired a patent in 1896 for what was referred to as improvements to the manual street sweeper trucks.
A street-sweeping person might use a broom, or water hoses, or both, to clean off litter and filth that accumulates on streets. A mechanical street-sweeper converts the broom to several rotating disks or drums covered in bristles, with which it sweeps away dirt after spraying the street with water. The bristles from these rotating disks frequently fall off and are left in the street. They are commonly repurposed to produce home-made lockpicks.
A regenerative air street sweeper uses forced air to create a swirling knifing effect inside of a contained sweeping head and then uses the negative pressure on the suction side to place the road debris inside of a containment hopper. The debris laden air is then cleaned and reused to start the process anew. Many regenerative air sweepers are AQMD (Air Quality Management District) certified and can pick up PM-10 fines, a leading cause of stormwater pollution.de:Kehrmaschine