Adjustable length parallel linkage for agricultural sprayer boom

Abstract

An agricultural sprayer includes a mobile frame, a boom, and a boom-positioning mechanism. The boom is spaced from the frame. The boom-positioning mechanism is configured to support the boom on the frame for selective movement between a raised boom position and a lowered boom position. The boom-positioning mechanism includes a positioning actuator, and a telescoping parallel linkage providing constant spacing between the boom and the frame in the raised boom position and lowered boom position. The positioning actuator is configured to place the boom in the raised boom configuration upon elongation and in the lowered boom position upon retraction. The agricultural sprayer may further include a controller for positioning the boom relative to an underlying surface.

Dependencies are inferred from the claim text.