| 摘要 |
A mobile sweeper having a wheel supported housing to be moved forward and backward over a surface to be swept of debris. A pair of parallel elongated rotary brushes are mounted in the housing for rotation and extend in the direction of their elongation transversely to the direction of normal forward movement of the housing. These rotating brushes project downwardly through a bottom opening in the housing for sweeping an underlying surface of leaves and other debris. The drive for the brushes drives the rotary brushes in counter rotation whereby debris is swept upwardly between the brushes. A vacuum shredder fan is also mounted in the housing and communicates through a vacuum chute with the bottom opening of the housing for drawing in debris swept up by the brushes and chipping, shredding or mulching and discharging the shredded debris through a discharge chute for collection. A damper valve plate is disposed in this vacuum chute between the brushes and the shredder fan and is operable for closing off the vacuum chute whereby a vacuum port positioned on the vacuum chute between the damper valve plate and the shredder fan is provided for connecting a vacuum conduit, such as a vacuum hose or vacuum funnel chute, to the port for vacuum communication with the shredder fan.
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