Implement

Details Implement Implement

1978-05-12

1980-07-29

Johnson, Richard J.

Earth working

Overload shifting

Frangible lock

64 28R, 172103, A01B 6104

Patent

active

042146356

ABSTRACT:
An implement mounts a plurality of working members through couplings, each coupling having a first member that can turn relative to a second member, upon overload. A shear pin normally prevents relative turning between the two members until overload and the pin is mounted on a holder that is releaseably connected to the coupling. The pin is in severable portions, one portion being sheared upon each overload and the remainder of the pin being automatically advanced to re-establish operative connection between the members when the latter are again in operative alignment.

REFERENCES:
patent: 1410717 (1922-03-01), Pestel
patent: 1635442 (1927-07-01), Sigurd
patent: 1778477 (1930-10-01), Wood
patent: 2395342 (1946-02-01), Morkoski
patent: 2913060 (1959-11-01), Owen
patent: 3049898 (1962-08-01), Voth
patent: 3762655 (1973-10-01), Brewer

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