Gasspring

A gas spring, also known as a gas strut or gas lift, is a device that provides a force through the pressure of a compressed gas, typically nitrogen, stored in a sealed cylinder with a piston and rod. When mounted, the gas spring can support, lift, or dampen motion, often providing a relatively constant force over part of its travel.

Construction and operation: A gas spring consists of a cylindrical body containing gas at high pressure and a piston connected to a rod. As the rod is pushed in, the gas is compressed and stores energy; when released, the gas expands to push the piston outward, producing force. Many gas springs are single-acting, delivering force primarily when extending, while some designs incorporate damping or adjustable valves to modify response. Consumer variants are usually pre-filled and not user-adjustable, though some industrial models offer external adjustment.

Performance characteristics: The force produced is determined by the gas charge, piston area, and internal friction. Temperature and altitude can affect gas pressure, altering force and stroke. The mounting angle and alignment influence the effective force and motion profile. Typical ratings are given in newtons, with stroke length indicating travel distance; selection often considers required lift, speed of movement, and space constraints.

Applications: Gas springs are widely used in furniture, such as office chairs and cabinet doors, as well as in automotive and aerospace applications for bonnet, hatch, or tailgate supports. They are also found in medical devices, industrial enclosures, and equipment that requires controlled opening, holding, or damped movement.

Safety and maintenance: Do not puncture or incinerate gas springs, and avoid exposing them to high heat or impact. If a gas spring leaks, replace the unit rather than attempting to repair it. Proper mounting and alignment are important for safe and reliable operation.