Patent ID: 11877538
Assignee: CALMER HOLDING COMPANY, LLC
Field: Other special machines (Mechanical engineering)
Classification: CPC A | IPC A

Claim 9:
10. A method of abrading grain comprising:
rotating a drum of a combine to mechanically propel a harvested ear, head, or pod in a direction approximately parallel to three elongated concaves each having horizontal bars;
separating grain from the ear, head, or pod with straight edges of the horizontal bars that are located at a first concave of the three elongated concaves and straight edges of vertical dividers of said first concave, wherein the horizontal bars of the first concave and the vertical dividers define spaces therebetween;
optimizing a collection of separated grain with gaps located between the horizontal bars of a second elongated concave of the three elongated concaves, wherein the gaps are larger than the spaces; and
mitigating damage to separated grains by using curved bars at the second concave and the third concave;
wherein the three elongated concaves each comprise a top frame member with an outer surface positioned in a common plane; and
wherein the three elongated concaves each comprise a bottom frame member that terminate at a common axis;
wherein a total open area in each of the first concave, the second concave, and the third concave is between three hundred square inches and four hundred square inches;
wherein a percentage of total grain harvested by the first concave is between 40% and 100% and the percentage of total grain harvested by the second concave and the third concave and any separating grates is between 0% and 60%.