Earth working – Tool – standard or connection – Specific tool and standard connection
Patent
1975-03-06
1977-01-11
Shapiro, Paul E.
Earth working
Tool, standard or connection
Specific tool and standard connection
172 59, 172526, 172681, 172713, 172748, 172765, 172770, A01B 3314
Patent
active
040022099
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.
REFERENCES:
patent: 22651 (1859-01-01), House
patent: 3616862 (1971-11-01), VAN DER Lely
patent: 3783948 (1964-01-01), VAN DER Lely et al.
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