Expandable and retractable unloader

Details Expandable and retractable unloader Expandable and retractable unloader

1997-02-26

1999-01-12

Melius, Terry Lee

Crop threshing or separating

Transport conveyor

460119, 414505, A01F 1246

Patent

active

058579079

ABSTRACT:
A grain combine threshes grain from crop and deposits the grain in a grain bin. A discharge conveyor is mounted to the grain bin. At the distal end of the discharge conveyor is a discharge for expelling the grain. A telescopic, secondary unloader which is smaller than the discharge conveyor is located immediately below the discharge. The secondary unloader may be variably extended beyond the end of the discharge, or retracted when it is not in use. The secondary unloader is divided into grain conveying and paddle return sections which are formed from a partition which extends along the length of the secondary unloader. Paddles are provided in each section and are joined to a continuous flexible linkage mounted around sprockets. The secondary unloader uses hydraulic cylinders to extend and retract. When the secondary unloader is retracted, it is recessed inward from the distal end of the discharge conveyor which operates in a conventional manner by discharging grain from the discharge. When the secondary unloader is in an extended position, the reach of the discharge conveyor is extended by the length of the secondary unloader. In the extended position, grain is expelled from the discharge and falls into the grain conveying sections at the proximal end of the secondary unloader. The secondary unloader then conveys the grain to its distal end where the grain is expelled.

REFERENCES:
patent: 4169536 (1979-10-01), Seem
patent: 5407390 (1995-04-01), Carney et al.
patent: 5498119 (1996-03-01), Faivre
patent: 5498215 (1996-03-01), Underwood et al.
patent: 5509854 (1996-04-01), Underwood

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