Energy-storing springs are available in different styles, the most common of which is coil. Coil springs are characterized by a helical construction consisting of a single piece of coiled wire. Some of them act as compression springs, meaning they become shorter under loads. Other coil springs act as extension springs, meaning they become longer under loads.
In addition to coil springs, there are gas springs. Gas springs are designed to store energy. Rather than relying on coiled wire, they use gas. There are also extended stroke gas springs. Extended stroke gas springs work like most other gas springs, but they feature a longer stroke.
The Basics of Gas Springs
Gas springs are energy-storing devices that leverage pressurized gas. They consist of a rod, tube, end fitting and various internal components. The main cylindrical body contains pressurized gas — typically nitrogen and oil.
The rod is connected to a piston package that seals the gas-filled body. When exposed to an external force, the rod will recede in the body. This action will further compress the gas. The pressurized gas will then push back against the rod, thus creating an extension force.
Gas Spring ‘Stroke’ Explained
To better understand extended stroke gas springs, you must familiarize yourself with the meaning of the word “stroke.” When used in the context of gas springs, stroke is the maximum distance the rod can travel.
All gas springs have a rod. As previously mentioned, it’s connected to a piston package. Gas springs work by facilitating the movement of this rod in and out of a gas-filled body. The stroke of a gas spring represents how far its rod can travel.
What Is an Extended Stroke Gas Spring?
An extended stroke gas spring is a special type of gas spring with a longer stroke distance than other gas springs. They still feature all of the same parts as other gas springs, such as a rod, tube, end fitting and internal components. Extended stroke gas springs, though, have a longer stroke distance.
While there are different types of extended stroke gas springs, some of them feature a telescoping mechanism. Rather than only using one cylinder, they use two cylinders. The smaller cylinder moves in and out of its larger counterpart to achieve a longer stroke distance.
Extended stroke gas springs are often adjustable. They can be adjusted to fit the applications for which they are used. You may be able to adjust the stroke distance, for example. If the stroke is too long, you may be able to shorten it.