Scissors Jack

General Information About Scissors Jack

A scissor jack is a type of device that helps to gradually raise a vehicle off of the ground. It is called a scissor jack because it consists of diagonal metal pieces that expand or contract in a manner resembling a pair of scissors.

Scissor car jacks usually use mechanical advantage to allow a human to lift a vehicle by manual force alone. There is an also electrically operated car scissor jacks that are powered by 12 volt electricity supplied directly from the car's cigarette lighter receptacle. The electrical energy is used to power these car jacks to raise and lower automatically. Electric jacks require less effort from the motorist for operation. If we briefly talk about the history of jack, the original scissor jack design dates back to 1908, was updated in 1913 from an original design know as a Lazy-Tongs mechanism by Edgard Cremieu-Javal, and then again in 1920 by Joseph(Jack) Lafrance.

How Does It Work ?

The manual scissor lift jack uses a long handle piece that is a lot like a wrench. The jack user inserts the handle into a point on the jack stand, and turns it, expanding or contracting the “scissor” pieces by threading them through a long, horizontal bolt. Another way that these types of jacks are convenient in a roadside situation is that the long handle piece makes it easier to access the jack when the vehicle is on the ground. The best jacks have adjustable handles so that the user can move the handle from one ground-side horizontal position to the other and then flip the handle over to continue moving the jack bolt in the same direction.

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