Twin row cultivator
Patent 4126190 Issued on November 21, 1978. Estimated Expiration Date: 
August 27, 1996. 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.
August 27, 1996. 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 2941606 3208535 3327786 3539019 3627061 3921726 Earthworking implement and row guide apparatus Patent #: 3998275 InventorAssigneeApplicationNo. 05/718120 filed on 08/27/1976US Classes:172/624.5, With parallelogram-type linkage172/646Laterally adjustable tools, independently free to move verticallyExaminersPrimary: Johnson, Richard J.Attorney, Agent or FirmInternational ClassesA01B 39/00 (20060101)A01B 39/14 (20060101) AbstractA cultivator frame assembly particularly adapted for cultivation of bed-planted crops comprises a parallelogram linkage frame adapted to be attached to a conventional tool bar and a bed cultivator frame carried by the parallelogram linkage frame. The bed cultivator frame provides a series of longitudinally spaced tool bars for mounting the gauge wheel and such cultivating tools as will properly cultivate the multiple crop rows of each bed. The two frames are readily detached so that various forms of the bed cultivator frame may be employed with the common parallelogram linkage frame, as need arises.Field of SearchParallel, pivotally adjusted tool barsBy parallel links Specific mounting for pivoted tool bar WITH GROUND SUPPORT VERTICALLY ADJUSTABLE RELATIVE TO FRAME Parallel transverse tooth bars Relatively movable because of operation Three or more laterally spaced groups Plural groups movably connected to forward transverse draft bar Plural tool groups relatively vertically movable because of operation Groups abreast and in tandem Group movable about oblique horizontal axis Laterally adjustable tools, independently free to move vertically | |
