Patent ID: 6761630
Filing Date: 2004-07-13
Classification: A01F

Abstract:
A method of automatically controlling an opening size of a sieve of an agricultural combine, comprising the steps of:(a) storing a value for the opening size; (b) determining an actual value for the opening size; and (c) comparing the actual value with the stored value, and, (i) if the actual value is at least a predetermined amount greater than the stored value, then automatically closing the sieve until the actual value equals the stored value; (ii) if the actual value is greater than the stored value by less than the predetermined amount, then automatically opening the sieve until the actual value is the predetermined amount greater than the stored value, then automatically closing the sieve until the actual value equals the stored value; and (iii) if the actual value is less than the stored value, then automatically opening the sieve until the actual value is the predetermined amount greater than the stored value and then automatically closing the sieve until the actual value equals the stored value.