Abstract: A net rotation speed control system for an oscillatory shaker head assembly driven by a force-balance drive carried on a crop harvester has a harvester forward velocity signal input. Also provided is an operator input for selecting appropriate speed relationship between the harvester velocity and the net shaker head rotation velocity. The system is useful as an open loop system, but is improved to correct for otherwise uncontrolled operating conditions by incorporating a speed sensor for net shaker head rotation velocity and closing the loop by connecting an output from the net rotation speed sensor to the control system.

Abstract: An array of foliage contacting rods having a certain stiffness and trunk contacting rods having a greater stiffness is assembled in combination for mounting on an oscillatory shaker head configured to be carried over row cultivated crops by a mobile harvester to effect crop harvesting by both foliage shaking and trunk shaking using a single shaker head. Moreover, the number of rods of each type may be varied to suit harvesting conditions while the oscillatory shaker head remains in place in the mobile harvester and the stiffness of each rod is adjustable within limits to further conform to harvesting conditions. The rod array in one embodiment provides simultaneous harvesting of multiple rows of a crop cultivated in parallel row configuration.

Abstract: A harvester for tree borne fruit is disclosed wherein a power driven vehicle is provided for following a course adjacent and parallel to a row of fruit trees. The vehicle carries a vibratory brush having tines for engaging and shaking the tree's fruit bearing branches. The brush is yieldably held in engagement with the fruit bearing branches and is adjustable in three aspects, elevation, tilt angle and lateral position, to assume an optimum position relative to the row of trees. A brake is provided to control a net rotation speed of the vibratory brush within the branches. A resilient screen deflects randomly projected harvested fruit toward a harvested fruit catch apparatus. The tines are covered with an optimally designed resilient cover for reducing cullage in the harvested fruit.

Abstract: A harvester for harvesting grapes or other fruits from plants. The harvester uses elastomer spring to support the closure wings of the harvester. The elastomeric spring may be a block of elastomeric material connecting a closure plate to the frame of the harvester. The elastomeric spring allows movement of the closure plate in many different directions. In addition, the elastomeric spring has fewer parts and is easier to assemble than conventional spring systems.