Bin unloading apparatus
US5348435A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1991 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Jul 8, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G65/466
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A bin unloading apparatus for unloading materials such as, for example, sawdust, peat, grains, silage, municipal waste, dry chemicals, shredded tires, and other ground bulk products accommodated in a bin, with the bin unloader including two cantilevered tapered screw conveyors and a single standard screw. The screw conveyors draw materials from the walls of the bin toward the center. The materials drop to the exit screw mounted at a right angle to the screw conveyor with the material in the exit screw then being transported out of the bin. The screw conveyors are supported on a head assembly mounted on a support beam of rail using a cam follower bearing and a chain drive system provides a reciprocating motion of the head assembly utilizing a ratchet mechanism driven by a drive of the exit screw. The screw conveyors are attached to the head assembly by a flange attachment and a spring loaded arm or linkage mechanism runs on an eccentric to drive the chain. If the head assembly encounters an obstacle or otherwise encounters a resistance in movement, the spring collapses and does not allow a forward movement of the head until the obstruction or resistance is removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.