What is a chain jack?

A chain jack is a mechanical device used to lift heavy many objects and devices. It is made of a pulley that is held together by a closed chain. The closed string forms a loop, which makes it easier to pull the hands. On the same axle there is one large and one small pulley, as well as a mobile pulley that holds the load on the spot.

In order to raise the load with a chain jack, the closed string must be pulled out. When it is drawn, a large pulley attracts more chains than what the smaller side releases. Hence the lifting process.

Although the history of the Kladnice is unclear, it is known that primitive methods have been used to move heavy objects. One of the first attempts at the pulley system was the only fixed pulley that failed because the friction prevented the wheel from turning. Lanova pulleys, which were commonly used to wash water from the wells and are still used to this day, is expected to have been invented next time.

Archimedes, Greek inventor of the early 3rd century BCEm, he was credited for inventing a pulley designed to pull ships out of the sea. This has been achieved with a special block system and tools that are still used to this day. Such early inventions from the pulley led to the development of a chain jack.

There are three types of chain jacks: air, manual and electric. Manual and air are designed with reducing gears, ototes of hooks and rotation. These devices suspended by the upper hook or by using a push or transmitted trolley move objects slowly and carefully when height adjustments. The attached load is well secured, so it can be left without required to supervise.

On the other hand, electric chain jack loads are generally used. It allows the user to pull out the side and vertically.