By a News Reporter-Staff News Editor at Journal of Engineering -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Biggerstaff, Joseph M. (Wichita, KS); Bergkamp, Alan R. (Wichita, KS), filed on December 19, 2012, was published online on August 12, 2014.
The assignee for this patent, patent number 8801512, is AGCO Corporation (Duluth, GA).
Reporters obtained the following quote from the background information supplied by the inventors: "This invention relates to threshing and cleaning systems for combine harvesters, and more particularly, to method for managing the airflow of a blower mechanism through the threshing and cleaning systems of the combine harvester.
"Combine harvesters have a threshing mechanism for threshing the harvested crop and a cleaning system used to remove chaff and other residue from the threshed crop. In one example, a rotor cooperates with concaves to thresh the harvested material, and initial separation occurs as grain and smaller residue are pushed through the grated concaves by centrifugal force to the cleaning system. Large residue pieces such as stalks and stems continue to move rearwardly and are eventually discharged out the rear end of the rotor assembly where it is acted upon by a chopper or spreader and deposited on the ground.
"Within the cleaning system, oscillating sieve assemblies in conjunction with air flow remove the chaff from the threshed grain, which gravitates through the chaffer and sieve assembly to an oscillating clean grain pan. The clean grain pan, in turn, directs the clean grain to a discharge auger that elevates the grain to an onboard storage bin. A second oscillating pan directs materials other than grain over the edge of the bottom sieve assembly to a different discharge outlet for recirculation back through the threshing, separating and cleaning apparatus to extract the previously unthreshed grain.
"A blower may be used to produce an airstream that entrains the lighter non-grain particles and carries them out the rear of the harvester. However, it can be challenging to control the airflow from the blower to get an even distribution of air across both the threshing mechanism and the cleaning system."
In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "In an example embodiment, the invention is directed to a method of managing the airflow of a blower mechanism through the threshing and cleaning systems of a combine harvesting machine. The method includes calculating a G factor at a first point on an upper chaffer that is just underneath the forward edge of a grain pan to determine if the G factor at said first point is greater than 1+n, where n represents a desired factor. The method includes adjusting the blower mechanism to reduce an airstream, thereby causing a reduction in the rearward movement of grain if the G factor at said first point is greater than 1+n. The method also includes calculating a MOG factor at said first point if the G factor calculated at said point is less than 1+n. The blower mechanism is adjusted to increase the airstream so as to entrain more MOG if the MOG factor at said first point is less than 1+x, where x represents a desired factor. The method also includes calculating a MOG factor at a second point if the MOG factor at said first point is greater than 1+x and adjusting the blower to reduce the airstream if it is determined the MOG factor at said second point is greater than 1+y, where y represents a desired factor or adjusting the blower to increase the airstream if it is determined the MOG factor at said second point is less than 1+y."
For more information, see this patent: Biggerstaff, Joseph M.; Bergkamp, Alan R.. Method for Measuring Air Efficiency and Efficacy in a Combine Harvester. U.S. Patent Number 8801512, filed December 19, 2012, and published online on August 12, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8801512.PN.&OS=PN/8801512RS=PN/8801512
Keywords for this news article include: AGCO Corporation.
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