Concave for an agricultural combine
First Claim
Patent Images
1. A concave for a crop processing unit having a rotating member rotating about an axis that cooperates with the concave to thresh a crop, the concave comprising one or more concave sections each having:
- a frame having curved end members axially spaced from one another and two straight support members joined to the curved end members; and
an array of straight rectangular bars and straight round bars spaced from one another and extending axially between the curved end members forming openings therebetween for grain to pass through with the rectangular bars and the round bars being arranged in an alternating fashion with one another and being welded to the frame.
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Abstract
A concave for an agricultural combine having an array of straight rectangular bars and straight round bars spaced from one another and extending axially of the rotor or cylinder to form a threshing surface and to form openings therebetween for grain to pass through. The round bars shed crop material to reduce plugging while the rectangular bars provide an aggressive threshing edge. Smaller diameter wires can be inserted between the round and rectangular bars to reduce the opening size for use with small grains.
67 Citations
7 Claims
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1. A concave for a crop processing unit having a rotating member rotating about an axis that cooperates with the concave to thresh a crop, the concave comprising one or more concave sections each having:
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a frame having curved end members axially spaced from one another and two straight support members joined to the curved end members; and
an array of straight rectangular bars and straight round bars spaced from one another and extending axially between the curved end members forming openings therebetween for grain to pass through with the rectangular bars and the round bars being arranged in an alternating fashion with one another and being welded to the frame. - View Dependent Claims (2, 3, 4)
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5. A concave for a crop processing unit having a rotating member rotating about an axis that cooperates with the concave to thresh a crop, the concave comprising one or more concave sections each having:
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a frame having curved end members axially spaced from one another and two straight support members joined to the curved end members;
an array of straight bars spaced from one another and extending axially between the curved end members, the straight bars being welded to the frame and the bars forming an arcuate threshing surface, the bars having openings therebetween for grain to pass through; and
straight wires extending axially between the curved end members and spaced between adjacent bars to reduce the opening size between the bars, the straight wires not being attached to the frame wherein the straight wires can be individually removed from between the bars to selectively provide larger opening sizes for grain to pass through. - View Dependent Claims (6, 7)
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Specification