# US 2014/0194170 A1 · Threshing mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194170 A1 - Document ID: US20140194170A1 - Status: Published application - Kind: A1 - Application number: 14/147,765 - Filed: 2014-01-06 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: CLAAS Selbstfahrende Erntemaschinen GmbH - Applicants: Claas Selbstfahrende Erntemaschinen GmbH - Inventors: Bernd Holtmann; Dirk Esken; Manfred Krieft; Franz Buddenkotte; Ralf Bussmann - Web page: https://patentgrep.com/patent/US20140194170A1 ## CPC - A01F 12/28: Devices for adjusting the concaves - A01F 12/26: Multi-part threshing concaves - A01F: PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE (devices for topping or skinning onions or flower bulbs A23N15/08) ## Abstract A threshing mechanism is formed with a first threshing drum and a second threshing drum disposed one behind the other in a direction of crop flow. A first concave encloses the first threshing drum and the second threshing drum in sections in a circumferential direction. A second concave encloses the second threshing drum in sections in the circumferential direction. The concaves are displaceable in a radial direction of the threshing drums and are formed with at least one crop-processing device disposed at the first concave. The first concave and the second concave are swivellable about a common axis connecting the concaves. The enclosure of the second threshing drum by the first concave and the second concave is approximately identical. ## Claims ### Claim 1 A threshing mechanism, comprising: a first threshing drum and a second threshing drum disposed one behind the other in a direction of crop flow; a first concave enclosing the first threshing drum and the second threshing drum in sections in a circumferential direction; and a second concave enclosing the second threshing drum in sections in a circumferential direction, wherein the concaves are displaceable in a radial direction of the threshing drums and comprise at least one crop-processing device disposed at the first concave; wherein the first concave and the second concave are swivellable about a common axis connecting the first and the second concaves; and wherein the enclosure of the second threshing drum by the first concave and the second concave is approximately identical. ### Claim 2 (depends on 1) The threshing mechanism according to claim 1, wherein at least the first concave comprises a concave frame in which at least two concave segments are each disposed in the circumferential direction and wherein the at least two concave segments are at least partially replaceable. ### Claim 3 (depends on 2) The threshing mechanism according to claim 2, wherein the at least two concave segments are liftable in the radial direction relative to the frame of the first concave and are then movable in the axial direction. ### Claim 4 (depends on 2) The threshing mechanism according to claim 2, wherein the at least two replaceable concave segments are disposed next to one another in the axial direction of the first concave. ### Claim 5 (depends on 2) The threshing mechanism according to claim 2, wherein rails are disposed on the concave frame of the first concave. ### Claim 6 (depends on 2) The threshing mechanism according to claim 2, wherein groove-shaped recesses are disposed, offset relative to one another, in the concave frame of the first concave and in the concave segments accommodated therein. ### Claim 7 (depends on 1) The threshing mechanism according to claim 1, wherein the first concave comprises a first and a second circular arc-shaped section, which are angled with respect to one another and form a wedge-shaped transition region between the respective arc-shaped sections. ### Claim 8 (depends on 7) The threshing mechanism according to claim 7, wherein the at least one crop-processing device is designed as filler plates, which can be inserted underneath the first concave, upstream of the wedge-shaped transition region. ### Claim 9 (depends on 7) The threshing mechanism according to claim 7, wherein the at least one crop-processing device is designed as filler plates, which can be inserted downstream of the wedge-shaped transition region in the second section, underneath the first concave. ### Claim 10 (depends on 7) The threshing mechanism according to claim 7, wherein the at least one crop-processing device is designed as a grate that is disposed axially parallel to the threshing drums in the wedge-shaped transition region and wherein the grate is swivellable about a pivot axis and extends across an axial length of the threshing drums. ### Claim 11 (depends on 10) The threshing mechanism according to claim 10, wherein the grate comprises a closed main body having a substantially U-shaped profile. ### Claim 12 (depends on 11) The threshing mechanism according to claim 11, wherein the grate comprises, on the circumference thereof, at least one element extending across a width of the grate beyond the closed main body in the radial direction. ### Claim 13 (depends on 1) The threshing mechanism according to claim 1, wherein the first concave and the second concave comprise straps, wherein the first concave and the second concave are connected in an articulated manner to angular levers by the straps and wherein each of the straps is swivellable about a fixed axis. ### Claim 14 (depends on 10) The threshing mechanism according to claim 10, wherein the crop-processing device, grate and plates are actuatable independently of one another.