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

Claim 0:
1. A harvesting system comprising:
a drum of a rotary combine;
a straight bar concave in a first position, wherein:
the straight bar concave utilizing intersecting bars, wherein some of said intersecting bars including a sharp leading edge, wherein the sharp leading edge abrades harvested materials and separate grain therefrom when the rotary drum rotates; and

a plurality of round bar concaves in a second and a third position;
wherein the straight bar concave in the first position and the plurality of round bar concaves in the second and third positions each comprise a top frame member with an outer surface positioned in a common plane; and
wherein the straight bar concave in the first position and the plurality of round bar concaves in the second and third positions each comprise a bottom frame member that terminate at a common axis;
wherein a total open area in each of the straight bar concave in the first position and the plurality of round bar concaves in the second and third positions is between three hundred square inches and four hundred square inches;
wherein a percentage of total grain harvested by the straight bar concave in the first position is between 40% and 100% and the percentage of total grain harvested by the plurality of round bar concaves in the at least second and third positions and any separating grates is between 0% and 60%.