Product design 3

For my third product design I made a small crane that can be assembled at the back of trucks. This crane was made from standard materials and had to have three main functions.

 The crane needs to be able to rotate while the bottom part stays screwed into place. The handle at the bottom locks and unlocks the rotation.

You needed to be able to manually pump the crane up as shown in this video.

The crane needed to be extendable. By loosening the screws at the top you can manually move the top beam for a shorter or longer range.