| 摘要 |
A sweeping apparatus (20) includes a frame structure (56) that supports a rotational brush assembly (57) including elongated bar members (58) rotationally connected to a pair of wheel or disk members (60, 62). A plurality of elongated strip brush members (64) are mounted on the bar members (58) and oriented at a predetermined acute angle relative to a direction of movement and moved in an oval rotational pattern about a rotational axis and simultaneously in longitudinal movement parallel to the rotational axis. The movement of the strip brush members (64) induces substantially more pushing movement on the loose particles in a direction laterally outward parallel to the rotational axis than in a direction perpendicular to the rotational axis. The strip brush members (64) contact with and withdraw from the surface in a substantially vertical orientation.
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