Patent References 1068155 Particulate material spreader with selectively detachable three-point linkage Spreader/grader Skid shoe for snow plow blade Adjustable spreader-grader Earth scraper for use with a small tractor Convertible spreader grader assembly Landscape conditioning assembly Soil leveling apparatus with improved scraper member Eccentric dowel pin and pin-adjusted structure in hole type modular tooling systems Patent #: 4997303 InventorsApplicationNo. 748524 filed on 08/22/1991US Classes:172/393, Spaced parallel runners with tool mounted therebetween172/445.1, Including blade, scraper, or smoother172/684.5, Frame-supported blade, scraper, or smoother drawn by vehicle172/744Vertically adjustableExaminersPrimary: Reese, Randolph A.Assistant: Warnick, Spencer Attorney, Agent or FirmInternational ClassesA01B 035/20F16B 001/00 AbstractA grader especially adapted for use in association with a tractor having a three-point hitch with the grader being capable of use in cutting, moving, spreading and leveling all types of soil, aggregate and the like. The grader can also be used to carry, spread and level hot and cold asphalt, soil, aggregate and the like. The grader has blades adjustable to a predetermined depth with the specific angle of the grader blades and the speed of movement in relation to the surface being worked determining the operational characteristics of the grader. The grader includes a pair of transversely extending blades oriented at a particular angle and being vertically adjustably attached to a pair of side frame members having ground engaging slide shoes along the lower surface thereof. The ends of the blades are vertically adjustably connected to the side frame members and provided with manually operated cam structures to adjust the blades vertically. The blades are mounted on an angled support bar in vertically adjusted positions to enable the position of the blades to be adjusted to compensate for wear.Field of SearchIncluding blade, scraper, or smootherTool plus added part forms diverse tool Tool rearranged on support structure Plural runner supported implements relatively movable during operation Spaced parallel runners with tool mounted therebetween Adjustable Element adjusted for wear compensation Relatively adjustable tool and runner Vertically adjustable Frame-supported blade, scraper, or smoother drawn by vehicle Scraper blade Pulled (e.g., by horse or vehicle) Selective orientation Screed or drag | |