Patent ID: 7032472
Filing Date: 2006-04-25
Classification: E02F,F03G,Y10T

Abstract:
1. An apparatus for providing a counterbalance for a linkage assembly, comprising: a load handling machine with a frame that includes a chassis; at least one load handling linkage movably connected to the frame, the at least one linkage defining the linkage assembly; means for controllably moving the linkage assembly; an energy storing device connected to the frame and engaged by the linkage assembly as the linkage assembly approaches a raised position; and a lift position engaging assembly for engaging the energy storing device by the linkage assembly, the lift position engaging assembly including: a pivot assembly having a first end pivotally connected to the frame and a second end in engaged contact with the energy storing device; and a slide bar having a first end connected to the linkage assembly and a second end slidably connected to the pivot assembly; wherein the energy storing device stores energy from the linkage assembly during engagement and provides the stored energy to counterbalance the weight of the linkage assembly.