Concave for an axial flow type combine
First Claim
1. In an axial flow combine having a mobile frame adapted to be propelled forwardly over a field of grain bearing crop material, at least one longitudinally extending axial flow threshing and separating unit mounted within the frame, said unit including a generally cylindrical casing and a rotor mounted for rotation with the casing, said casing including an improved lower longitudinally extending concave, the rotor having means mounted on the periphery thereof and being operable upon rotation of said rotor and in cooperation with the improved concave to thresh grain from the unthreshed grain bearing crop material introduced into said unit and advance the crop material through said unit while subjecting the crop material to a threshing and separating action wherein threshed and separated grain material passes through said concave to a grain handling and cleaning means disposed underneath said axial flow unit, said improved concave comprising:
- (a) a plurality of longitudinally extending rod-like members;
(b) at least two spaced apart transversely extending arcuate shaped support members for supporting said rod-like members, said rod-like members being arranged to define an arc about a common axis and aligned generally parallel to each other; and
(c) one or more sleeve members rotatably mounted on at least one of said spaced apart rod-like members so as to define openings between adjacent ones of said members and facilitate the passage of threshed and separated crop material therethrough.
2 Assignments
0 Petitions
Accused Products
Abstract
In an axial flow type combine, an improved concave is provided which remains open in the most adverse corn harvesting conditions, thereby increasing the overall efficiency of the machine. The improved concave comprises a frame formed by a plurality of spaced-apart transversely extending arcuate shaped support members joined together at their respective ends by a pair of spaced-apart longitudinally extending support elements. The frame supports a plurality of spaced apart longitudinally extending rod-like members which are generally linear throughout a substantial portion of their longitudinal extent, the linear portions of the respective rod-like members being generally parallel to the axis of a rotor positioned above the concave in the combine. The rod-like members are provided with rotatably mounted sleeves which freely rotate about the rod-like members as crop material moves over the concave. These rotatable sleeves facilitate the passage of threshed crop material through the openings in the concave defined between the sleeves and further serve to reduce the impact of the crop material against the concave, thereby resulting in less crop damage.
28 Citations
40 Claims
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1. In an axial flow combine having a mobile frame adapted to be propelled forwardly over a field of grain bearing crop material, at least one longitudinally extending axial flow threshing and separating unit mounted within the frame, said unit including a generally cylindrical casing and a rotor mounted for rotation with the casing, said casing including an improved lower longitudinally extending concave, the rotor having means mounted on the periphery thereof and being operable upon rotation of said rotor and in cooperation with the improved concave to thresh grain from the unthreshed grain bearing crop material introduced into said unit and advance the crop material through said unit while subjecting the crop material to a threshing and separating action wherein threshed and separated grain material passes through said concave to a grain handling and cleaning means disposed underneath said axial flow unit, said improved concave comprising:
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(a) a plurality of longitudinally extending rod-like members; (b) at least two spaced apart transversely extending arcuate shaped support members for supporting said rod-like members, said rod-like members being arranged to define an arc about a common axis and aligned generally parallel to each other; and (c) one or more sleeve members rotatably mounted on at least one of said spaced apart rod-like members so as to define openings between adjacent ones of said members and facilitate the passage of threshed and separated crop material therethrough. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An improved concave for use with an axial flow combine comprising:
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(a) a support frame including front and rear transversely extending arcuate shaped support members; (b) a plurality of transversely spaced apart longitudinally extending rod-like members supported by said frame and which are linear throughout a substantial portion of their longitudinal extent; and (c) one or more sleeves rotatably mounted on some of said spaced apart rod-like members so as to define openings between adjacent ones of said members and facilitate the passage of threshed crop material therethrough. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. In an axial flow combine having a frame adapted to be propelled forwardly over a field of grain bearing crop material, at least one axial flow unit mounted within the frame, and grain handling and cleaning means disposed below said axial flow unit, said axial flow unit including a generally cylindrical longitudinally extending casing and a rotor mounted for rotation within said casing, said casing having a lower longitudinally extending improved concave, said rotor having threshing means mounted on the periphery thereof and operable upon rotation of said rotor to advance crop material through said unit and to thresh grain from said grain bearing crop material, said improved concave comprising:
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(a) a front support member, a rear support member and at least one intermediate support member spaced between said front and rear suupport members, said support members being of an arcuate shape and extending transverse to the axis of said longitudinally extending rotor; (b) a plurality of longitudinally extending rod-like members supported by said support members, said rod-like members being transversely spaced one from the other to define an opening therebetween to allow the passage of threshed crop material therethrough; and (c) one or more sleeve members mounted on some of said rod-like members so as to be rotatable about said rod-like members upon impact of crop material with said sleeve members to reduce the impact forces on said crop material and thereby decrease damage to said threshed crop material. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An improved concave for use with an axial-flow type combine comprising:
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(a) a frame including a plurality of arcuate shaped transversely extending spaced apart support members; (b) a plurality of transversely spaced apart longitudinally extending rod-like members supported by said arcuate shaped members to define a grid system through which threshed and separated crop material may pass; (c) one or more sleeves inserted over some of said rod-like members, said sleeves being capable of rotating about said rod-like members thereby enhancing the radial movement of crop material over said concave and the passing of threaded and separated crop material through openings defined between adjacent sleeves and adjacent rod-like members. - View Dependent Claims (33, 34, 35, 36, 37)
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38. In an axial flow type combine including a generally cylindrical casing having an infeed end arranged to receive crop material in a substantially axial direction, rotor means rotatably mounted within said casing and having threshing means mounted on the periphery thereof, and an improved concave supported within said casing at least partially along the lower surface portion of said rotor means for cooperation with said threshing means to form a region in which crop material is threshed, said improved concave comprising:
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(a) a plurality of rod-like members; (b) a frame for supporting said rod-like members in generally parallel relationship to said axial direction and in an arcuate configuration; and (c) one or more removable sleeves rotatably mounted on some of said rod-like members for reducing the threshing impact of the crop material against said concave. - View Dependent Claims (39, 40)
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Specification