US 12,219,901 B2
Combine with threshing chamber defined by distinct sequences of concaves
Marion Calmer, Alpha, IL (US); and Daniel Wallerstedt, Rio, IL (US)
Assigned to CALMER HOLDING COMPANY, LLC, Lynn Center, IL (US)
Filed by CALMER HOLDING COMPANY, LLC, Lynn Center, IL (US)
Filed on Aug. 19, 2024, as Appl. No. 18/808,925.
Application 18/808,925 is a continuation of application No. 18/531,420, filed on Dec. 6, 2023, granted, now 12,102,041.
Application 18/531,420 is a continuation of application No. 17/899,240, filed on Aug. 30, 2022, granted, now 11,877,538, issued on Jan. 23, 2024.
Prior Publication US 2024/0407299 A1, Dec. 12, 2024
Int. Cl. A01F 12/44 (2006.01); A01D 41/12 (2006.01); A01F 12/18 (2006.01); A01F 12/20 (2006.01); A01F 12/24 (2006.01); A01F 12/26 (2006.01); A01F 12/28 (2006.01)
CPC A01F 12/446 (2013.01) [A01D 41/12 (2013.01); A01F 12/184 (2013.01); A01F 12/442 (2013.01); A01F 12/20 (2013.01); A01F 12/24 (2013.01); A01F 12/26 (2013.01); A01F 12/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A combine for harvesting a harvested material that includes a grain, the combine comprising:
a threshing chamber comprising a series of threshing and separating apparatuses, sequentially arranged, comprising at least:
(i) a straight bar concave having (i) vertical support bars oriented at an angle to account for a velocity of the grain separated in threshing and (ii) horizontal rub bars perpendicularly oriented with respect to said vertical support bars, said horizontal rub bars being configured to cause a rebound effect where the grain is deflected upwardly and out of straight bar throats of the threshing chamber;
(ii) a first round bar concave having a first plurality of round bars and a first center bar that contacts a midpoint of each of the first plurality of round bars, with first openings defined in spaces between the first plurality of round bars and the first center bar, and
(iii) a second round bar concave having a second plurality of round bars and a second center bar that contacts a midpoint of each of the second plurality of round bars, with second openings defined in spaces between the second plurality of round bars and the second center bar, the second openings;
wherein the size of each of the straight bar throats is smaller than a size of the first openings, and the size of each of the first openings is smaller than the size of each of the second openings.