Mobile screening apparatus
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United States of America Patent
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-
Jul 13, 1999
Grant Date -
N/A
app pub date -
Apr 16, 1997
filing date -
Apr 16, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mobile screening apparatus can be vibrated by two similarly-constructed vibration units that are mounted on or near the front and rear walls of the box that contains the vibrating screen assembly. Each vibration unit comprises an hydraulic motor having a stub drive shaft and a circular eccentric cam or weight carried on the shaft. The screen assembly has connections to the circular cams or weights, whereby motor rotation vibrates the screen assembly. The use of stub shafts eliminates whipping shaft motions associated with conventional elongated shafts spanning the screen assembly.
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