Tines
OwnerAry van der Lely, Cornelis Johannes Gerardus Bominventors
Life of this patent
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Abstract
A steel soil cultivating tine has a lower soil working portion and an upper fastening portion. The tine has zones of differing hardness along its length, the hardest zone including the lowermost end of the tine. The tine can take different shapes and configurations, but in general the soil working portion has sides, at least several of which taper towards the lowermost end. The fastening portion can be threaded for reception in a threaded holder. Near the juncture between the fastening and soil working portions a zone of reduced hardness lends flexibility to the tine.
Claims18
A soil-cultivating implement comprising a plurality of rotatable soil-working members located side-by-side in a row that extends transverse to the direction of travel of the implement, said soil-working members each having at least one downwardly extending, elongated steel tine and said tine being comprised of an upper fastening portion and a lower soil-working portion having a tip, said soil-working portion comprising at least three zones of increasing Rockwell hardness towards said tip and said soil-working portion being interconnected with said fastening portion at an integral junction, said third zone of said soil-working portion being of the lowest hardness of said three zones and substantially coinciding with a part of said soil-working portion located adjacent said junction, the fastening portion of said tine comprising two zones of different hardness, the zone of greater hardness adjoining said junction and the zone of lower hardness being screw-threaded and connecting said fastening portion in a substantially horizontal holder of a soil-working member, said junction being located adjacent the lower side of said holder.
A tine for rotary cultivator use comprising an elongated steel tine having a lower soil-working portion that terminates in a tip and an upper fastening portion, said soilworking portion being interconnected to said fastening portion at a junction and said tine having zones of different Rockwell hardness along its length, a zone of said soil-working portion located and adjacent the interconnection between that portion and said fastening portion being of lower hardness and more flexible and elastic than the remainder of said soil-working portion, the relative hardness of said soil-working portion increasing towards its tip, said fastening portion having zones of different hardness, a shoulder at said junction being provided between a zone of greatest hardness of the fastening portion and the zone of lower hardness of said soil-working portion, at least one projection being located adjacent said junction.
A tine for rotary cultivator use comprising an elongated steel tine having a lower soil-working portion that terminates in a tip and an upper fastening portion, said soil-working portion being interconnected to said fastening portion at a junction and said tine having zones of different Rockwell hardness along its length, the relative hardness of said soil-working portion increasing towards its tip, said soil-working portion having three zones of successively decreasing hardness commencing from a lowermost zone which includes said tip, at least one of said zones being of different length that the length of the lowermost zone, a third zone having the lowest hardness of said three zones and substantially coinciding with a part of said soil-working portion located adjacent said junction.
Dependencies are inferred from the claim text.