Agricultural disk having non-directional fracture properties

Details Agricultural disk having non-directional fracture properties Agricultural disk having non-directional fracture properties

1979-04-16

1981-07-28

Johnson, Richard J.

Earth working

Rolling, rotating or orbitally moving tool

Detailed disk structure per se

172747, 76101A, 2940201, 148 39, A01B 2306

Patent

active

042805660

ABSTRACT:
A hardened agricultural disk, which is manufactured from a straight rolled steel, is provided with concentric rows of softened oblong areas or oblong openings, which are arranged radially inwardly of the periphery of the disk in non-diametrical alignment and in such a manner that a directional radial crack must pass into one of the areas, or openings, in one of the concentric rows, and be arrested in that row.

REFERENCES:
patent: Re9169 (1880-04-01), Johnson
patent: 213439 (1879-03-01), Miller
patent: 1186880 (1916-06-01), Canada
patent: 1292336 (1919-01-01), Lee
patent: 2327129 (1943-08-01), Ronan
patent: 2416742 (1947-03-01), Farr
patent: 2596574 (1952-05-01), Lutes
patent: 2814580 (1957-11-01), Hoover
patent: 3408237 (1968-10-01), Gulliksen
patent: 3647577 (1972-03-01), Gomada
patent: 3959863 (1976-06-01), Bruce
patent: 4099576 (1978-07-01), Jilani

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