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US 4,053,020 AGranted
Soil working tines
OwnerCornelis van der Lelyinventor
Life of this patent
Estimating the term…
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OwnerCornelis van der Lelyinventor
Estimating the term…
A tine on a rotary harrow has an upper fastening portion and a lower soil working portion which portions meet at a junction. The fastening portion is tapered to be tightly held in a holder without turning and has an upper threaded end that receives a nut and a lower, multi-sided region that merges into a similar region at the top of the soil working portion. The junction has an enlarged cross-section that preferably is hexagonal and towards the lower tip of the soil working portion, the cross-section changes into a generally rectangular cross-section region. When placed in a holder, the junction is located at the lower end of the holder and the longitudinal axes of the two portions are angled to one another. Also, a rib is located at the leading side of the soil working portion and grooves are formed in the leading flat sides thereof. Grooves of lesser magnitude are formed in the trailing sides of the soil working portion relative to the direction of intended rotation.
An elongated tine for a rotary harrow comprising a substantially straight upper fastening portion and a substantially straight lower soil working portion that terminates in a lower tip, said fastening portion having a lower first tapering part and an adjoining upper second tapering part, each of said parts tapering inwardly and upwardly towards a screw threaded portion located at an upper free end of the fastening portion, said first part adjoining an integral junction with said soil working portion and said second part being located between said first part and said screw threaded portion, said first part more steeply tapering inwardly than said second part and each said part having a substantially conical configuration, said second part extending for substantially at least half of the length of said fastening portion.
An elongated tine for a rotary harrow comprising a substantially straight upper fastening portion and a substantially straight lower soil working portion that terminates in a lower tip, the longitudinal axes of said fastening portion and working portion being inclined to one another, said fastening portion having a lower first tapering part and an adjoining upper second tapering part, each of said parts tapering inwardly and upwardly towards a screw threaded portion located at an upper free end of the fastening portion, said first part adjoining an integral junction with said soil working portion and said second part being located between said first part and said screw threaded portion, said first part more steeply tapering inwardly than said second part and each said part having a substantially conical configuration, said second part extending for substantially at least half of the length of said fastening portion.
Dependencies are inferred from the claim text.