Powered industrial truck

A powered industrial truck, comprising:

• two racks;
• a carriage including two frame members, two opposing seats on each frame member, and a platform on a top;
• a lateral movement assembly including four sliding members slidably disposed on the seats respectively, two pivotal elongated members disposed on intermediate portions of the frame members respectively, four links each having a first end pivotably secured to an end of the sliding member and a second end pivotably secured to either end of the pivotal elongated member, a motor shaft having two ends pivotably secured to intermediate portions of the pivotal elongated members respectively, a first electric motor disposed on one of the frame members, and four mounts attached to the sliding members respectively, each mount having a plurality of rollers;
• two lift assemblies each including a second electric motor, a shaft having two ends rotatably secured to the sliding members respectively, two gear trains disposed at the ends of the shaft respectively, a first gear rotatably connected to the second electric motor, a second gear disposed on the shaft, and a first roller chain disposed on the first and second gears;
• two attachments disposed on the platform and being laterally moveable, each of the attachments including a third electric motor, two spaced sprockets wherein one of the sprockets is rotatably secured to the third electric motor, a second roller chain disposed on the sprockets, a toothed elongated member meshed with the second roller chain, and a rope having a first end attached to the toothed elongated member, and a fork connected to a second end of the rope;
• two wheel assemblies each including a wheel rotatably disposed on either side of a bottom of the carriage, and a servo motor disposed in the carriage for driving the wheel;
• two casters disposed at front and rear ends of the carriage respectively;
• and
• a plurality of rails mounted on the racks, each rail including a groove having two end holes and two projecting limit members at two sides respectively, a chain disposed in the groove, and two pins each passing through one of the end holes and either end of the chain, each pin having two end troughs and two snap rings each disposed in one of the end troughs to fasten the pin and the groove together.