Grain processor
US5181616A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Mar 8, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B13/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A grain processor for separating and measuring components of a sample of grain as it passes through a rotary sieve having two or more sieving sections having different perforations. The separated particles in each of the sieving sections are passed through a densimetric column containing a stream of pressure-adjustable air generated by a blower to remove impurities from the separated grain which is channeled into a weighing hopper which measures the weight of the grain or impurities and registers the information in a unit provided with data processing and recording circuits, including a microprocessor. Tachometers provide rotational speed pulses to rotation control circuits in the unit which provides an input to motor controllers associated with the motors driving the fans and the rotary sieve. Each of the rotation control circuits is provided with a motor-driven potentiometer coupled to an optical coded disc which provides an output to adjacently-positioned optical heads providing an input into the unit. Alternatively, each of the rotation control circuits may use a solid-state electronic interface between the microprocessor and the motors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.