The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 29, 1997
Filed:
Sep. 14, 1995
Marc R Jonckheere, Snellegem, BE;
New Holland North America, Inc., New Holland, PA (US);
Abstract
A combine harvester (1) is provided with a grain cleaning mechanism (12), comprising a fan (33) installed in a generally volute-shaped fan housing (72), having primary air inlets (73) in its side walls and a secondary air inlet (74) in its top wall. The housing (72) further has a main outlet duct (80) directed to a chaffer sieve (31) and a lower grain sieve (32) and an additional outlet duct (81) directed to a pre-cleaning sieve (29) and an associated grain pan (30). The secondary air inlet (74) is covered with a plurality of juxtaposed plates (75), comprising sets of louvres (76) which are opened rearwardly. Grain kernels which unwantedly fall off the leading edges of the sieves (29, 31, 32) or the grain pan (30) and into the outlet duct (80, 81), may be engaged and thrown upwardly by the blades (95) of the fan (33), but will be returned into the fan housing (72) by the louvres (76), which nevertheless do not obstruct an efficient air intake by the fan (33) .