SPADE Russian patent published in 1997 - IPC

FIELD: agricultural implements. SUBSTANCE: spade is provided with double-tube bush, stepped shaft and auxiliary lever for turning of blade. One end of shaft is rigidly secured in blade holder, other end is freely installed in one of bush tubes. Blade is provided with protrusion which by means of flexible link is pivotally connected with upright of support. Auxiliary lever for blade turning is connected to upper part of handle by means of gusset. Lower end of handle is installed in second tube of double-tube bush. Blade return spring and lock are installed on stepped shaft. EFFECT: high efficiency. 1 dwg