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US 4,057,112 AGranted
Subsoil plow
AssigneeGrain Systems, Inc.
InventorQuentin Taylor
Life of this patent
Estimating the term…
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AssigneeGrain Systems, Inc.
InventorQuentin Taylor
Estimating the term…
A subsoil plow having a plurality of forwardly facing C-shaped plow teeth arranged on a rigid frame in a generally V-shaped array. Each plow tooth has an upper portion, a curved shank portion, and a bottom tip and is mounted on the frame by a so-called pivot bolt located directly above the tip of the tooth and by a shear bolt spaced from the pivot bolt, the shear bolt being adapted to fail in shear upon application of a predetermined load to the plow tooth, such as may be occasioned upon the tooth striking an underground object as the plow is pulled through the field, so as to release the tooth and to permit it to swing upwardly and rearwardly about the pivot bolt without the tip of the tooth digging deeper into the ground. Also disclosed is a hitch which enables the plow to readily be coupled to a tractor equipped either with a category 2 or 3N or a category 3 three point hitch with or without an automatic coupler.
A subsoil plow having a rigid frame, a plurality of plow teeth, means for mounting each of said teeth on the frame in a plowing position, and means for hitching said frame to a tractor or the like, said tractor being adapted to pull the plow through a field with said teeth penetrating the ground to a desired depth, each of said teeth being a generally forward facing member having an upper portion, a downwardly extending shank, and a bottom tip portion, said mounting means comprising pairs of frame members, one pair for each said tooth, spaced for receiving the upper portion of a respective tooth, said tooth being connected to said frame members by safety release means adapted to release said tooth upon application of a predetermined load to said tooth as occasioned upon the tooth striking an object as it is pulled through the field and by a pivot member located directly above said tip portion of the tooth so that in the event said safety release means releases said tooth while the plow is being drawn through the field, said tooth will rotate rearwardly and upwardly about said pivot member up out of the ground without said tip portion moving below its plowing position, said teeth being arranged in a generally V-shaped array with one of the teeth constituting a center tooth being disposed substantially on the longitudinal center line of the plow forward of the other teeth and with at least one pair of said teeth being spaced laterally outwardly and rearwardly of said center tooth, on both sides thereof, said frame comprising a forward main frame member, said pairs of frame members extending rearwardly from said forward main frame member with one pair of said frame members being located substantially on the longitudinal center line of said plow holding said center tooth, said one pair of frame members being shorter than the other pairs of said frame members, and with said other pairs of frame members being spaced equidistantly from one another and each of said other pairs extending rearwardly a distance greater than its inner adjacent pair of said frame members thereby to hold said teeth in said generally V-shaped array.
Dependencies are inferred from the claim text.