Particulate material spreader with selectively detachable three-point linkage
Patent 4196778 Issued on April 8, 1980. Estimated Expiration Date: 
November 22, 1997. 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 22, 1997. 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 212393 1252588 1578011 1845324 1851064 1875492 2731896 3556228 3846923 Land levelling equipment Patent #: 4082150 InventorApplicationNo. 05/853860 filed on 11/22/1977US Classes:172/445.1, Including blade, scraper, or smoother172/248, To different type of hitch172/451, With tool frame or bar extending beyond sides of vehicle280/408With draft means at front and rear of same vehicle (e.g., vehicle train)ExaminersPrimary: Stouffer, Richard T.Attorney, Agent or FirmInternational ClassesA01B 31/00 (20060101)E02F 3/76 (20060101) AbstractA particulate material spreader comprising a ground-contacting platform adapted for detachable connection to towing device which causes the platform to traverse the ground so as to engage at least in part the surface thereof subtended by the platform. Engagement is by one or more members supported by the platform transversely with respect to the transit path of the platform. Each member has at least one vertically resolvable surface irrespective of the attitude of the platform. The connection is such that a pre-set angle of the platform with respect to a horizontal plane is maintained during transit whereby the members gouge relatively high areas of engaged ground and fill relatively low areas thereof with spoil from those high areas. The platform is attached to the towing device by a selectively detachable three-point linkage which may be mounted on one end or the other of the platform.The platform is attached to the towing device by a selectively detachable three-point linkage which may be mounted on one end or the other of the platform.Field of SearchLeveling drag or furrow shaperIncluding fabric or flexible tool First tool with spaced trailing sweep Sweep adjustable Teeth and scraper, leveller or drag Including teeth Including drag, scraper or levelling blade Proceeded by implement of different type CONVERTIBLE; OR CHANGEABLE BY DISASSEMBLY OR ASSEMBLY To different type of hitch Changeable by disassembly or assembly WITH WHEEL SUBSTITUTE (E.G., RUNNER, ETC.) Spike tooth implement Spaced parallel runners with tool mounted therebetween MAST TYPE HITCH (E.G., THREE POINT HITCH, ETC.) With tool frame or bar extending beyond sides of vehicle FABRIC OR FLEXIBLE TOOL WITH DRAFT DETAIL | |
