Crop threshing or separating – Cleaner – Sieve or grate
Reexamination Certificate
2008-06-18
2009-06-30
Pezzuto, Robert E (Department: 3671)
Crop threshing or separating
Cleaner
Sieve or grate
Reexamination Certificate
active
07553226
ABSTRACT:
A grain cleaning system for a combine harvester, comprises a frame supporting a grain pan and a sieve. The grain pan receives grain and chaff separated from the crop by a threshing mechanism and is reciprocable relative to the frame in order to separate the grain from the chaff and to propel the grain and chaff towards the sieve. The sieve is reciprocable relative to the frame and is connected to the frame by front and rear support arms and that are pivotably secured to the frame and to the sieve. In the invention, the front support arms have different geometries from the rear support arms such that when the sieve is reciprocated relative to the frame, the vertical component of oscillation is greater at the front end than at the rear end of the sieve.
REFERENCES:
patent: 3593719 (1971-07-01), Ashton et al.
patent: 3757797 (1973-09-01), Mathews
patent: 4344443 (1982-08-01), De Busscher et al.
patent: 6672957 (2004-01-01), Voss et al.
patent: 1397939 (1975-06-01), None
Bossuyt Johnny
Dhont André G. J.
Duquesne Frank R. G.
Somers Tom N. N.
CNH America LLC
Harms Michael C.
Pezzuto Robert E
Sheldrake Patrick M.
Stader John William
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