DISC SHOVEL - 2 Russian patent published in 2008 - IPC A01B23/06 A01B35/20 

FIELD: agriculture.

SUBSTANCE: disc shovel is made as a concave disc with a toothed profile. The disc is mounted with the convexity up and fixed on a support. The support is placed in the centre of the disc. The disc is set rigidly on the axis. The support consists of three parts connected by hinges to each other. The hinges axes are perpendicular to each other. The hinges are fitted with spiral-band springs. The springs are rigidly fixed at the top on the opposite sides of the upper and middle parts of the disc support above the hinges for holding the support parts in operation position. Teeth tips form three rows placed at different heights. The upper row is placed at the distance equal to 2/3 of the specified tilling depth, the second - at that of 1/2 of the specified tilling depth and the third row - at that of 1/4 of the specified tilling depth. The rows teeth are of different length. Teeth with tips forming the second row are considered as basic ones and the length of each second tooth in this row accounts for the "golden section 1.61" of the basic tooth. Length of the upper row teeth amounts to 0.8 of the basic tooth length and these teeth are set horizontally at the level of junction of two adjacent teeth from the lower row next but one with the same pitch. Tips of all teeth are fitted with detachable bits made from wear-resistant material.

EFFECT: improving quality of stony soil tillage without damaging the toothed surface of the shovel.

3 dwg