Ground-working implement

Details Ground-working implement Ground-working implement

1986-02-06

1988-10-04

Johnson, Richard J.

Earth working

With drive means for tool or cleaner

With non-driven tool

172112, 172474, 37222, E02F 378, E02F 3302

Patent

active

047750146

ABSTRACT:
A ground-working implement for rotary field tilling or ice or snow-tending n ski slopes or the like which is drawn by a tractor or a tracked vehicle and which comprises a holder connected to the vehicle pendulously by a longitudinal beam which can be raised and lowered. The holder is connected to a rotary ground-loosening unit and a smoothing board by a four-point linkage whose cranks are dimensioned so that upon raising of the ground-loosening unit the orientation of the smoothing board remains largely unaltered thereby allowing the latter to be used for leveling the ground when the ground-loosening unit is in its raised or rest position.

REFERENCES:
patent: 3130796 (1964-04-01), Rogers
patent: 3693722 (1972-09-01), Brown
patent: 4523398 (1985-06-01), Scheibel
patent: 4559725 (1985-12-01), Wieland

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