SPRAY BOOM Russian patent published in 2008 - IPC A01M7/00 

FIELD: equipment for machines designed for protecting of plants from pests, diseases, as well as for weed controlling by means of sprayers.

SUBSTANCE: spray boom has carriage made in the form of isosceles trapezium with two four-link mechanisms attached to sides of trapezium. Two four-link mechanisms of parallelogram type are mounted in vertical plane. Carriage is positioned in sprayer frame guides. Upper base of carriage is connected by means of cable hanger to movement mechanism fixed to frame and designed for moving carriage in vertical plane. Each of said mechanisms consists of pivotally interconnected links of different length, said links having axes extending in horizontal plane. First link is made immovable and integral with carriage side. Opposite second link is made integral with cantilevered boom part disposed between pivot joint for connecting it to third link which is joined with its other end to upper pivot joint of first link, and pivot joint for connecting cantilevered part with forth link positioned at point of intersection of line making continuation of third link in its working position with plane of working position of forth link. Other end of forth link is connected to lower pivot joint of first link. Forth link is made in the form of flat triangular frame with apex at point of connection thereof with cantilevered part of boom. Other links of boom are made of single-beam type from bar having triangular, box-like or round circular section.

EFFECT: simplified construction and manufacture process, increased strength, enhanced reliability in operation, reduced weight, material consumption and costs.

2 cl, 4 dwg