Winch construction for a vibratory concrete screed
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United States of America Patent
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-
Jun 13, 1995
Grant Date -
N/A
app pub date -
Jun 28, 1994
filing date -
Jun 28, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A winch assembly is connected to each end of a vibratory concrete screed to move the screed across a concrete slab to be finished. Each winch assembly includes a rotatable drum with a cable wound on the drum. The free end of each cable is connected to a fixed object mounted along the side of the concrete slab. To wind the cable on the drum and move the screed along the slab, the eccentric drive shaft of the screed is connected through a variable speed belt drive to the respective drum. Each belt drive includes an adjusting mechanism for varying the effective diameter of a belt drive pulley, thus providing a variation in speed. Each winch assembly also includes an eccentric gear speed reducing mechanism, which is connected between the belt drive and the drum to further reduce the output speed to the cable drum.
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