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US 6,264,553 B1Granted
Rasp bar threshing element and assembly
AssigneeCase Corporation
InventorsCorey Neumann, Edward N. A. Rahe, John T. Sponzilli
Life of this patent
Estimating the term…
Abstract
A threshing element for an axial flow combine comprising a chromium steel alloy rasp bar. The rasp bar is cast of chromium-moly white cast iron with an inclined front face with a slope of about 52.5°. The cast iron contains 18% to 23% chromium. The rasp bar walls are about 15 mm thick.
Claims11
A threshing element for mounting on a rotating drum in a combine, comprising:
- a) a rasp bar formed from cast iron containing at least 18% chromium;
- b) said rasp bar having a roof section, a downwardly and forwardly inclined front wall and left and right side walls;
- c) a mounting aperture through said roof section defining a radial mounting axis for the rasp bar when it is mounted on the drum;
- and
- d) said downwardly and forwardly inclined front wall being at least 10 mm thick and having a front face inclined downwardly at a slope of less than 65° from a plane perpendicular to said axis.
2 more elements
A threshing assembly for an axial flow combine, comprising:
- a) a threshing rotor including a drum with a cylindrical skin;
- b) a threshing element mounting bracket fastened to said skin and extending radially outwardly therefrom;
- c) a rasp bar cast from a chromium-moly white cast iron with at least 18% chromium and having a roof section, a front wall and left and right side walls;
- d) said rasp bar being mounted on said bracket whereby a radial of said drum extends approximately perpendicularly through said roof section;
- and
- e) said front wall being at least 10 mm thick and having a front face inclined downwardly relative to said roof section at a slope of more than 45° and less than 65°.
3 more elements
A threshing element for mounting on a rotating drum in a combine, comprising:
- a) a rasp bar cast from a chromium-moly white cast iron having a chromium content of between 18% and 23%;
- b) said rasp bar having a roof section, a downwardly and forwardly inclined front wall and left and right side walls;
- c) said front wall being 10 mm thick or greater;
- d) a mounting aperture through said roof section defining a radial mounting axis for the rasp bar when it is mounted on the drum;
- e) said downwardly and forwardly inclined front wall having a front face inclined downwardly at a slope of more than 45° and less than 65° from a plane perpendicular to said axis.
2 more elements
Dependencies are inferred from the claim text.