US 12,376,527 B2
Concave with adjustable openings
Andrew J. Theisen, Fond du Lac, WI (US); Keith A. Johnson, West Bend, WI (US); Neal J. Stoffel, Campbellsport, WI (US); and Joseph W. Schaffer, Sr., Colgate, WI (US)
Assigned to Kondex Corporation, Lomira, WI (US)
Filed by Kondex Corporation, Lomira, WI (US)
Filed on May 16, 2024, as Appl. No. 18/666,139.
Application 18/666,139 is a continuation of application No. 17/954,902, filed on Sep. 28, 2022, granted, now 12,016,270.
Application 17/954,902 is a continuation of application No. 16/413,876, filed on May 16, 2019, granted, now 11,497,171, issued on Nov. 15, 2022.
Claims priority of provisional application 62/690,258, filed on Jun. 26, 2018.
Prior Publication US 2024/0298579 A1, Sep. 12, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A01F 12/26 (2006.01); A01F 12/44 (2006.01); A01D 69/06 (2006.01); A01D 75/28 (2006.01); A01F 12/18 (2006.01); A01F 12/28 (2006.01)
CPC A01F 12/26 (2013.01) [A01F 12/448 (2013.01); A01D 69/06 (2013.01); A01D 75/28 (2013.01); A01F 12/181 (2013.01); A01F 12/28 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A concave section for a harvester, comprising:
a concave body having an upstream side, a downstream side, a leading end and a trailing end, and defining an arcuate crop engagement face facing radially inwardly;
a plurality of crop passage openings defined through the arcuate crop engagement face;
a cover configured to at least partially cover at least some of the crop passage openings, the cover carried by the concave body and movable thereon between at least two different positions to adjust a degree of openness of at least some of the crop passage openings;
retainers acting between the cover and the concave and allowing movement of the cover on the concave body;
a drive portion that can be driven to position the cover relative to the concave body to control the degree of openness;
wherein the retainers comprise a slide assembly comprising a retainer slot and a pin acting between the concave body and the cover.