The displacement mechanism is based on a standard loading shelf in a Liftmaster Compact orLiftmaster Store. This has an internal pallet locking system (“RBG pallet locking system) and anexternal fixed stop. Additionally, two pairs of cylinders are installed for moving operations. Thefirst pair is installed below the pallet and can push the pallet out thanks to the diagonally arrangedpiston rods (“outward pallet movement”). The second pair is located outside in front of the palletand can push the pallet in thanks to the horizontally arranged piston rods (“inward palletmovement”).