Patent ID: 11856893
Assignee: AGCO CORPORATION
Field: Other special machines (Mechanical engineering)
Classification: CPC A | IPC A

Claim 0:
1. A rotary thresher for a combine harvester comprising:
a rotor;
a first concave located at a lower portion of the thresher, in a threshing position proximate to the rotor such that received cut crop material is threshed between the rotor and the first concave;
a frame;
a second concave, wherein the first concave and the second concave are located on the frame such that the first and second concaves at least partially surround the rotor; and
a stationary rotor housing comprising a generally hollow cylinder, and wherein the first and second concaves rotate or move around the outside of the rotor housing, wherein the rotor housing has a cut out section and the threshing position is coincident with the cuto out section, wherein the frame is configured to rotate around the rotor and rotor housing such that the second concave moves during rotation from a first resting position to the threshing position while the first concave is moved from the threshing position to a second resting position, wherein the and second resting positions are coincident with portions of the rotor housing other than the cut out section.