Earth working – With drive means for tool or cleaner – Plural driven tools
Patent
1975-03-06
1977-06-14
Marlo, George J.
Earth working
With drive means for tool or cleaner
Plural driven tools
172776, 172 68, 172 78, 172125, A01B 3306
Patent
active
040291537
ABSTRACT:
A rotary harrow has a plurality of soil working members mounted on corresponding shafts that extend upwardy within a hollow frame portion. Each shaft is journalled in bearings within the frame portion and has a pinion gear in mesh with neighboring gears of adjacent soil working members. Either of two different sized transmission gears on top of the frame portion can be connected to the p.t.o. of a prime mover to rotate the soil working members at different speeds. The frame portion has similar upper and lower U-shaped pans that have rims detachably fastened to one another. The ends of the frame portion are closed by sector plates and a rear roller has arms pivoted to the harrow and adjustably connected to the sector plates to regulate the working depths of the soil working members. The roller is comprised of elongate elements mounted on hollow supports that have concave recesses around their perimeters. The arms are connected to the roller by screened bearings and stub shafts that extend through a frusto conical shield located within a protective ring on the end supports.
REFERENCES:
patent: 2625867 (1953-01-01), Hands
patent: 2777272 (1957-01-01), Smith et al.
patent: 3530944 (1970-09-01), Spell
patent: 3616862 (1971-11-01), VAN DER Lely
patent: 3821989 (1974-07-01), VAN DER Lely et al.
patent: 3885633 (1975-05-01), VAN DER Lely et al.
patent: 3899029 (1975-08-01), VAN DER Lely et al.
patent: 3899030 (1975-08-01), VAN DER Lely et al.
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