Rotary harrows

Details Rotary harrows Rotary harrows

1977-08-09

1980-01-15

Myhre, Charles J.

Earth working

With ground support vertically adjustable relative to frame

Translating motion

172271, 172 59, 172103, 192 56, F16D 356, F16D 900

Patent

active

041832310

ABSTRACT:
A safety coupling between a driving coupling and a driven coupling has a shear pin operative connection that shears upon overload, allowing relative movement between the two couplings. The shear pin is urged to establish a second operative connection after limited relative movement between the couplings. In each operative connection, respective stops retain the pin against further displacement. In one application, soil working rotors are rotated by shafts coupled to tool supports. One or more of the driving shafts can be connected to its driven support through a shear pin. A flange on the shaft has an opening that houses the lower part of the pin and the tool support has a bore that houses an upper pin part. Upon shear, the flange turns and a spring urges the remainder of the upper pin part downwardly, whereupon a recess in the flange engages that part and a second operative connection is established.

REFERENCES:
patent: 1740838 (1929-12-01), Roesen
patent: 1778477 (1930-10-01), Wood
patent: 1972601 (1934-09-01), Regan
patent: 2384188 (1945-09-01), Mercier
patent: 3049898 (1962-08-01), Voth

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