Sweeping unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 20, 2004
Grant Date -
N/A
app pub date -
Apr 12, 2001
filing date -
Jun 17, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sweeping unit which can be affixed to a carrier vehicle or a trailer, comprising a supporting frame and at least one motor-driven rotary brush which is rotationally mounted around the longitudinal axis thereof. The supporting frame is provided with supporting wheels, whereby the vertical distance of said wheels from the axis of the rotary brush can be modified by means of an adjusting device comprising at least one adjusting member and a control unit. A sensor is provided for the detection of driving torque or the driving power of the rotary brush or an associated variable, whereby the signal from said sensor is switched to the control unit. The control unit determines the working position of the adjusting member corresponding to an optimum contact surface between the brush and the ground as a function of the contact position between the ground and the adjusting member, characterized by a sharp increase in said sensor signal when the rotary brush is lowered.
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