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

Claim 15:
16. A retrofit kit comprising:
a straight bar concave comprising:
opposing side frame members that approximate a curvature of an interior rotor of a single rotor combine to which the kit is retrofit;
rectangular horizontal bars extending between the opposing side frame members, wherein some of the rectangular horizontal bars including a sharp leading edge;
rectangular vertical bars perpendicularly intersecting the rectangular horizontal bars, wherein the rectangular vertical bars are spaced to provide spaces between the rectangular vertical bars and the rectangular horizontal bars, the size of said spaces depending on a size of a harvested material to be collected during a threshing process;

a cover plate that if secured to the straight bar concave blocks said spaces entirely;
round bar concaves each having curved bars extending from a first side frame member to an opposite, second side frame member, wherein the curved bars are spaced so as to provide longitudinal gaps therebetween; and
MOG limiters or inserts that can attach to the round bar concaves and are capable of narrowing a width of the longitudinal gaps;
wherein the straight bar concave and the round bar concaves each comprise a top frame member with an outer surface positioned in a common plane; and
wherein the straight bar concave and the round bar concaves each comprise a bottom frame member that terminate at a common axis;
wherein a total open area in each of the straight bar concave and the round bar concaves in the is between three hundred square inches and four hundred square inches;
wherein a percentage of total grain harvested by the straight bar concave is between 40% and 100% and the percentage of total grain harvested by the round bar concaves and any separating grates is between 0% and 60%.