Earth working – Rolling – rotating or orbitally moving tool – With disk cleaning means
Patent
1975-04-10
1977-02-22
Marlo, George J.
Earth working
Rolling, rotating or orbitally moving tool
With disk cleaning means
172762, 172775, A01B 1516
Patent
active
040087700
ABSTRACT:
This invention relates to an improved scraper assembly for the discs of ground tillage implements which is characterized by a mounting bracket fastenable onto the implement frame, an inverted generally L-shaped hanger subassembly carried by the mounting bracket for pendulous pivotal movement about an axis defined by the horizontally-disposed leg of said subassembly, a blade-carrying shaft mounted for rotational movement in the downwardly-opening vertically-disposed leg of the L-shaped subassembly, the latter element defining a self-cleaning housing therefor, biasing means connected between the bracket and hanger subassembly normally biasing the scraper blade housed therein against the concave face of the adjacent disc, an oversize annular groove in the shaft to which the blade is attached located inside the housing defined by the downwardly-opening tubular element of the hanger subassembly, a pin carried by said tubular element in tangential relation to the bottom of the annular groove within the shaft, and a ball-type thrust bearing at the upper closed end of the tubular element effective to absorb the thrust loads imposed upon the blade shaft while, at the same time, preventing the pin from touching the sides of the groove when under load.
REFERENCES:
patent: 718825 (1903-01-01), Davis
patent: 756107 (1904-03-01), Fetzer
Boone James A.
Lewallen Dennis L.
Walker Harold G.
Marlo George J.
Spangler, Jr. Edwin L.
Walker Harold G.
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