Forklift Analysis

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PATENTS SEARCH AND ANALYSIS Patent 1: Forklifts Title of Invention: Forklift Patent No: US20030156934A1 First Filled Country: United States Inventors: Tutomu Fujita, Yasunobu Tomiyama Kazumasa Kokura Brief about Invention: A forklift having a pallet lock device. On an upper face of a top end of a lock bar to lock a pallet, a tapered portion is disposed. When a fork is inserted into the pallet, the tapered portion comes into contact with an end face of the pallet and the lock bar rotates downward. When a landing sensor is turned on by a magnet disposed on the lock bar, the lock bar is immediately driven and the locking operation is started. Then, the top end of the lock bar pushes or comes into pressure contact with an upper face of a lower…show more content…
Brouwer (Sutton west, canada) Brief about Invention: A self propelled forklift vehicle having a frame formed by two spaced parallel longitudinal frame members and a rear transverse frame member. The fork carriage is movable forwardly and rearwardly on the longitudinal frame members, along the path of the machine, and carries a fork tower and forks. The forks can be forced below the vehicle to raise the vehicle up beneath the rear of a trailer for transport. The vehicle's rear wheels, which steer and drive the vehicle, are closely spaced and tillable from side to side to allow for rough terrain, with the operator seat and motor on opposite sides thereof to balance each other. A manually operated split pulley drive allows creeping of the vehicle at a closely controlled low speed. The fork tines include erectable rollers to support part of the vehicle weight when the forks carry a forwardly extended load, to prevent tipping. A front gate causes discharge of the contents of a pallet onto the ground when the fork carriage is retracted. An automatic centering mechanism returns the rear driving wheels to either front driving or rear driving position as selected by the…show more content…
These designs all have their own features, which include Different rotation angles and lifting mechanism. We are going to introduce Them one by one, compare their advantage & disadvantage and finalize Our design. 3.1.1 Design 1. Forks with Chain Lifting Transmission First thing here we want to do is to increase the rotation angle of those forks, see Figure 3.10. The rotation of the forks can be 360 degree, and after the forks are loaded with cargo, they will rotate and rest on the top of the operator cabin, which saves time from coming all the way down to the lowest point. (a) Starting position (b) Ending position This chain transmission is very similar to the rope transmission we use in our elevators .In roped elevators, the cabin is raised and lowered by traction steel ropes rather than pushed from below. The ropes are attached to the cabin, and looped around a sheave. The sheave is connected to an electric motor. When the motor turns one way, the sheave raises the cabin; when the motor turns the other way, the sheave lowers the cabin. Typically, the sheave, the motor

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