Soil working tines and their mounting
First Claim
1. A tine mounting for a rotary harrow, said mounting being rotatable about an upwardly extending axis and comprising a holder having an elongated bore that is dimensioned to receive a fastening portion of a tine, the longitudinal axis of said bore extending to substantially intersect the axis of rotation of said mounting approximately midway the length of said bore when viewed from aside, said longitudinal axis and said axis of rotation extending in nonperpendicular relationship to one another.
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Accused Products
Abstract
A tine mounting and tine both comprise a rotatable soil working member for a harrow designed to resist damage from stones and other debris on or in the soil. The mounting has an upper shaft that defines an axis of rotation and a holder with a bore that extends at an angle to intersect that axis. The fastening portion of a tine extends through the bore and has a threaded end that receives a retaining nut protected by a screening recess in the mounting. The tine has a lower soil working portion that joins the fastening portion adjacent the bottom of the holder and the junction is thickened with a polygonal cross section having recesses in its sides. The soil working portion has an upper part that extends in the same direction as the longitudinal axis of the fastening portion and the upper part is connected to a lower part by an integral bend. The lower part extends substantially parallel to the axis of rotation of the soil working member. The junction is polygonal, preferably hexagonal, with recesses in its sides. Towards the lower tip, the soil working portion changes to a square and then a rectangular cross section with a rib and at the tip, leading and trailing grooves are formed.
9 Citations
21 Claims
- 1. A tine mounting for a rotary harrow, said mounting being rotatable about an upwardly extending axis and comprising a holder having an elongated bore that is dimensioned to receive a fastening portion of a tine, the longitudinal axis of said bore extending to substantially intersect the axis of rotation of said mounting approximately midway the length of said bore when viewed from aside, said longitudinal axis and said axis of rotation extending in nonperpendicular relationship to one another.
- 7. A tine and mounting combination for a rotary harrow, said mounting being rotatable about an upwardly extending axis and comprising a holder with a bore that receives an upper fastening portion of said tine, said bore and fastening portion extending upwardly through said holder to a protective recess and said bore having a longitudinal axis that substantially intersects said axis of rotation at an acute angle that opens downwardly towards the ground when viewed from aside, said mounting being connected to a shaft that defines said axis of rotation, fastening means within said recess at the upper end of said fastening portion securing said tine in the mounting.
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20. A tine and mounting combination for a rotary harrow, said mounting being rotatable about an upwardly extending axis and comprising a holder with an upwardly extending bore that receives an upper fastening portion of said tine, said bore and fastening portion extending through said holder and said bore having a longitudinal axis that substantially intersects said axis of rotation at an acute angle that opens downwardly towards the ground when viewed from aside, said mounting being connected to a shaft that defines said axis of rotation, said fastening portion being connected to a soil-working portion that includes an elongated lower straight region and an elongated upper straight region, said regions being interconnected by an integral bend, said upper region extending in the same direction as said fastening portion and said lower region extending substantially parallel to said shaft.
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21. A tine and mounting combination for a rotary harrow, said mounting being connected to an upwardly extending rotatable shaft and being rotatable about an axis defined by said shaft, said mounting comprising a holder with an upwardly extending bore that receives an upper fastening portion of said tine, said bore having a longitudinal axis that substantially intersects said axis of rotation approximately midway the length of said bore when viewed from aside, said longitudinal axis and axis of rotation extending in nonperpendicular relationship to one another.
Specification