Agricultural spreader having multiple distribution members broadcasting material simultaneously to generally the same area
Patent 4836456 Issued on June 6, 1989. Estimated Expiration Date: 
November 25, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 25, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1629248 1779926 2638351 3368762 Centrifugal spreader, especially for granulated fertilizers Patent #: 4351481 InventorApplicationNo. 07/129322 filed on 11/25/1987US Classes:239/682, Plural239/661, With means for mounting on tractor239/665Including means varying scatter pattern of rotating scattererExaminersPrimary: Kashnikow, AndresAttorney, Agent or FirmInternational ClassA01C 17/00 (20060101)Foreign Application Priority Data1984-08-17 NLAbstractA spreader comprises four spreader members which, in operation, all spread material over substantially the same sector at the same time. The two central spreader members are lower than the two outer spreader members to avoid collisions between particles ejected from the different members. The hopper has four discharge funnels, each provided with a discharge outlet, the aperture size of which is controlled by a doser member. All of the doser members are rigidly connected together so that they move in unison and open each outlet opening initially in its central part considered in a direction transverse to the spreader's usual direction of travel. The hopper is very large, having a width of between two hundred sixty and three hundred centimeters. | |
