B - Operations – Transporting – 65 – G
Patent
B - Operations, Transporting
65
G
201/28
B65G 65/46 (2006.01)
Patent
CA 1184144
ABSTRACT OF THE DISCLOSURE The present invention provides in a bottom silo unloader mechanism having a sweep auger disposed to rotate about the center of the silo and having a drive unit for rotating said sweep arm, an overload mechanism connected in the drive unit and including a drive member, a drive pawl op- erably connected to the drive member and disposed to move in a reciprocating path, a rotatable ratchet having a series of teeth to be engaged by the drive pawl, said drive pawl acting to engage said teeth and incrementally rotate said rat- chet in one direction, a holding pawl engaged with said teeth to prevent rotation of the ratchet in the opposite direction, a shaft operably connected to the ratchet and disposed to rotate with the ratchet, a sprocket connected to the inner end of the shaft, a turntable mounted for rotation with respect to the silo and located at the center of the silo, means on said turntable and engageable with said sprocket for rotating said turntable in accordance with rotation of said sprocket, said sweep auger being mounted on said turntable and disposed to ro- tate therewith about the axis of said silo, and resilient means interconnecting the drive pawl and the drive member, whereby interruption Of rotation of the sweep auger due to engagement of the sweep auger with a densely packed area of stored material will cause compression of said resilient means and enable said drive pawl to move in said reciprocating path without correspond- ing rotation of said ratchet, thereby permitting the sweep auger to oscillate and back away from said densely packed area.
447324
A.o. Smith Corporation
Marks & Clerk
LandOfFree
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