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US 6,644,576 B1Granted
Blade sweep for pulverizers
OwnerStuart W. Hicklininventor
Life of this patent
Estimating the term…
Abstract
A blade sweep for a pulverizer having a grinding bowl to which the sweep is attached and a floor with a discharged outlet over which the sweep is moved. One blade sweep disclosed is mounted to the bowl skirt and another blade sweep disclosed is mounted to the underside of the bowl. The blade sweep includes a blade, a mounting base, and an axle extending along the mounting base. The axle is substantially horizontal and is rotatable about a longitudinal axis of the axle and pivot brackets are rigidly attached to the axle to allow the blade to swing up to a raised position to clear reject material. A biasing device urges the blade to return to the down sweeping position.
Claims32
A blade sweep and pulverizer comprising:
- a pulverizer including a housing with a floor, a rotary grinding bowl in the housing above the floor, a rotary spindle in the housing for rotating with the grinding bowl about a vertical axis,
- said blade sweep including,
- a blade,
- blade mounting means for supporting said blade vertically above said floor in a down position for sweeping and also for supporting said blade for rotation rearward about a substantially horizontal axis above said blade to a raised position to clear reject material on said floor, said blade mounting means including
- a mounting base adapted to mount to rotate with said spindle about said vertical axis and adapted to extend radially out from said bowl to near an inside wall surface of said housing,
- an axle extending along and in substantially parallel relation to said mounting base, said axle supported by said mounting base for rotation about a longitudinal axis of said axle and rotate relative to said mounting base,
- pivot bracket means along said axle, said pivot bracket means being rigidly fastened to said axle to rotate said axle, and
- blade biasing means supported by said mounting base arranged to urge said blade to said down position and resist movement to said raised position when said blade is impacted by said reject material during the rotation of said blade over said floor about said vertical axis.
5 more elements
A blade sweep and pulverizer comprising:
- a pulverizer including a housing with a floor having a discharge outlet, a grinding bowl in the housing having a race in the top and grinding rollers in the race, a feed chute for delivering material to be ground into said housing and onto said bowl with reject material on the bowl being pushed over the edge of the bowl onto the floor, a power driven spindle rotating the grinding bowl about a vertical axis, and a blade sweep movable with the spindle through an under-bowl area over the floor below the grinding bowl,
- said blade sweep including
- a blade,
- blade mounting means for supporting said blade vertically above said floor in a down position for sweeping and also for supporting said blade for rotation rearward about a substantially horizontal axis above said blade to a raised position to clear reject material on said floor, said blade mounting means including
- a mounting base adapted to mount to rotate with said spindle about said vertical axis and adapted to extend radially out from said bowl to near an inside wall surface of said housing, said axle being supported for rotation from below said mounting base by an attachment to a skirt on said bowl,
- an axle extending along and in substantially parallel relation to said mounting base, said axle supported by said mounting base for rotation about a longitudinal axis of said axle and rotate relative to said mounting base,
- pivot bracket means along said axle, said pivot bracket means being rigidly fastened to said axle to rotate said axle, and
- blade biasing means supported by said mounting base arranged to urge said blade to said down position and resist movement to said raised position when said blade is impacted by said reject material during the rotation of said blade over said floor about said vertical axis.
5 more elements
A blade sweep and pulverizer comprising:
- a pulverizer including a housing with a floor having a discharge outlet, a grinding bowl in the housing having a race in the top and grinding rollers in the race, a feed chute for delivering material to be ground into said housing and onto said bowl with reject material on the bowl being pushed over the edge of the bowl onto the floor, a power driven spindle rotating the grinding bowl about a vertical axis, and a blade sweep movable with the spindle through an under-bowl area over the floor below the grinding bowl,
- said blade sweep including
- a blade,
- blade mounting means for supporting said blade vertically above said floor in a down position for sweeping and also for supporting said blade for rotation rearward about a substantially horizontal axis above said blade to a raised position to clear reject material on said floor, said blade mounting means including
- a mounting base adapted to mount to rotate with said spindle about said vertical axis and adapted to extend radially out from said bowl to near an inside wall surface of said housing, said axle being support for rotation from above said mounting base by a mounting plate attached to the underside of said bowl,
- an axle extending along and in substantially parallel relation to said mounting base, said axle supported by said mounting base for rotation about a longitudinal axis of said axle and rotate relative to said mounting base,
- pivot bracket means along said axle, said pivot bracket means being rigidly fastened to said axle to rotate said axle, and
- blade biasing means supported by said mounting base arranged to urge said blade to said down position and resist movement to said raised position when said blade is impacted by said reject material during the rotation of said blade over said floor about said vertical axis.
5 more elements
A blade sweep and pulverizer comprising:
- a pulverizer including a housing with a floor having a discharge outlet, a grinding bowl in the housing having a race in the top and grinding rollers in the race, a feed chute for delivering material to be ground into said housing and onto said bowl with reject material on the bowl being pushed over the edge of the bowl onto the floor, a power driven spindle rotating the grinding bowl about a vertical axis, and a blade sweep movable with the spindle through an under-bowl area over the floor below the grinding bowl,
- said blade sweep including
- a blade,
- mounting base adapted to mount to rotate with said spindle about said vertical axis and adapted to extend radially out from said bowl to near an inside wall surface of said housing, said axle being supported for rotation from below said mounting base by an attachment to a skirt on said bowl,
- an axle extending along and in substantially parallel relation to said mounting base, said axle supported by said mounting base for rotation about a longitudinal axis of said axle and rotate relative to said mounting base,
- pivot bracket means along said axle, said pivot bracket means being rigidly fastened to said axle to rotate said axle, and
- blade biasing means supported by said mounting base arranged to urge said blade to said down position and resist movement to said raised position when said blade is impacted by said reject material during the rotation of said blade over said floor about said vertical axis.
4 more elements
Dependencies are inferred from the claim text.