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

Claim 5:
6. The 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;
wherein the frame is configured to rotate around the rotor 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; and
wherein the frame is configured to be raised and lowered relative to the rotor to alter a clearance between the rotor and the concave in the threshing position.