Subsoil rotary cultivator
Patent 4506610 Issued on March 26, 1985. Estimated Expiration Date: 
April 8, 2003. 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.
April 8, 2003. 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 673304 1105570 2546260 2560443 2804813 Rotary harrows Subsoil agricultural implement with rotatable disc Patent #: 4294181 InventorAssigneeApplicationNo. 06/483194 filed on 04/08/1983US Classes:111/139, Including trash control accessory172/39, With cleaner or comminutor spaced from ground surface172/59Vertical axesExaminersPrimary: Feyrer, James R.Attorney, Agent or FirmInternational ClassesA01B 39/00 (20060101)A01B 39/08 (20060101) AbstractDisclosed is a subsoil rotary cultivator. The cultivator can advantageously include a tool bar which is mounted to the tractor in the usual fashion. Group frames are advantageously mounted upon the tool bar and have spring-loaded pivoting arms upon which are mounted main tubular members. The main tubular members support a disc assembly using bearings which are positioned within the main tubular member, preferably at the extreme ends thereof. A central shaft extends through the bearings and main tubular member and has a disc attached transversely at the lower end. A shield tube is attached to the rotating disc assembly and extends upwardly from near the disc thereby providing an exterior surface which rotates with the disc in order to deflect weeds, straw, viney plants, and other debris, thereby preventing the cultivator from becoming plugged when it is drawn through a field. | |
