Abstract: A fruit harvesting device having a frame supported on wheels, one of which is a drive wheel. An elevatable and tiltable carriage supports a worker. An arm on the front of the frame is engageable with the tree so that device may be driven circumferentially about the tree as an area is picked to advance to an unpicked area of the tree.

Abstract: An aerial work platform apparatus includes a shiftable counterweight which shifts in response to movement of the boom in order to maintain optimum balance of the apparatus during movement of the boom and platform. The counterweight shifts towards and away from the front of the apparatus, and also in a vertical direction. Several constructions for shifting the counterweight are disclosed.

Abstract: A lift method and apparatus for moving an arm structure includes a first arm structure and a second arm structure pivotally connected to the first arm structure. The apparatus further includes a moving device and a displacing link for displacing the moving device relative to at least the first or second arm structures. The displacing link provides the moving device with a mechanical advantage whereby work required to move the second arm structure is substantially reduced while lifting capacity of the second arm structure and the moving device is substantially increased, and the range of motion of the second arm structure relative to the first arm structure is also increased.