Earth working – With drive means for tool or cleaner – Plural driven tools
Patent
1975-02-27
1977-04-12
Marlo, George J.
Earth working
With drive means for tool or cleaner
Plural driven tools
172713, 172774, 172766, 172 49, 172770, 172 68, 172 80, A01B 3300
Patent
active
040169332
ABSTRACT:
A rotary harrow has a plurality of soil working members each of which has a support and a central shaft that forms the axis of rotation of said member. Each support has a holder at each end thereof and a downwardly extending tine secured in each holder. The holder is preferably inclined so that its top is located further from the central shaft than its bottom and also leads in the direction of normal rotation relative to the holder bottom. The holders are sleeves with integral screens and the sleeves receive the fastening portions of tines. The holders together with the support form tine mountings configured to minimize damage from stones and other debris. The tine fastening portions are held inclined to the vertical as well as soil working portions which are bent first towards one another then away, so that the lower tine tips are located further from the shaft axis than are the corresponding fastening portions. A forward, generally cylindrical support member protects the soil working members and supports the harrow frame.
REFERENCES:
patent: 3774687 (1973-11-01), van der Lely
patent: 3783948 (1974-01-01), VAN DER Lely et al.
patent: 3841411 (1974-10-01), VAN DER Lely et al.
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