Combination spreader/grader apparatus
Patent 5332331 Issued on July 26, 1994. Estimated Expiration Date: 
March 17, 2013. 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.
March 17, 2013. 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 1232314 Spreader/grader Earth scraper for use with a small tractor Convertible spreader grader assembly Resurfacing apparatus and process Three-point hitch attached grader with adjustable blades Patent #: 5191943 InventorsApplicationNo. 032804 filed on 03/17/1993US Classes:404/96, With means for profile shaping, e.g., crown172/393, Spaced parallel runners with tool mounted therebetween404/118, Screed or dragD15/32Scraper blade or loader elementExaminersPrimary: Britts, Ramon S.Assistant: Lisehora, James A. Attorney, Agent or FirmInternational ClassesE01C 019/22E02F 003/76 AbstractAn improved spreader/grader apparatus having a pair of substantially parallel sidewalls, spaced apart, and supporting at least two spreader/grader blades therebetween. There would be provided a hydraulic or manual adjustment member connected to at least one end of each of the cutting blades, for allowing the one end to be movably adjusted along the length of the sidewalls, so that the blades may be moved from a position substantially perpendicular to the length of the sidewall, to a position angulated therefore, so as to provide a means to prevent material graded to accumulate along the length of the blades, but to slide along the angulated blade and be deposited outside the grader apparatus. The blades are fixed in their relation to the surface itself, and cannot rotate about an axis.Field of SearchWith means for profile shaping, e.g., crownScreed or drag Reciprocating Material distribution means Supported on rail type side forms Plural runner supported implements relatively movable during operation Spaced parallel runners with tool mounted therebetween Including blade, scraper, or smoother Frame-supported blade, scraper, or smoother drawn by vehicle Relatively adjustable tool and runner Tool freely or yieldably mounted on chassis Angularly adjustable bar Oblique bar Angularly adjustable about vertical axis Actuator for bodily shifting scraper subframe draft connection | |
