Patent ID: 7543767

Claim:
A method of providing a mechanical feed control system for a brush chipper comprising: a brush chipper with a mechanical feed control system including a spring-centered hydraulic control valve having three positions: a forward position, a reverse position, and a neutral position, and an upper feed control bar having four distinct positions: a forward position, a reverse position, a neutral position, and a stop position, said method comprising: (a) operatively, mechanically connecting the upper feed control bar and the hydraulic control valve; (b) mechanically setting the hydraulic control valve for forward feed when the upper feed control bar is in its distinct forward position; (c) mechanically setting the hydraulic control valve for no feed when the upper feed control bar is in its distinct neutral position; (d) mechanically setting the hydraulic control valve for reverse feed when the upper feed control bar is in its distinct reverse position; (e) defining the stop position as the fourth distinct position of the upper feed control bar to be at an extreme end of travel for the upper feed control bar; and (f) without using electrical components, mechanically setting the hydraulic control valve for no feed when the upper feed control bar is in its distinct stop position.