Earth working – Tool – standard or connection – Tooth
Patent
1975-02-06
1977-10-11
Marlo, George J.
Earth working
Tool, standard or connection
Tooth
172526, 172766, 172 59, 172762, A01B 2302
Patent
active
040530205
ABSTRACT:
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.
REFERENCES:
patent: 237789 (1881-02-01), Walker
patent: 267061 (1882-11-01), Chamberlain
patent: 712221 (1902-10-01), Wallis
patent: 770870 (1904-09-01), Sleeper
patent: 1033574 (1912-07-01), Freeman
patent: 1718248 (1929-06-01), Mohr
patent: 2847921 (1958-08-01), Heckathorn
patent: 3705630 (1972-12-01), Vissers
patent: 3809166 (1974-05-01), VAN DER Lely et al.
patent: 3841411 (1974-10-01), VAN DER Lely et al.
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