The gas spring is made up of a perfectly sealed, pressurized casing in which a stem can slide with alternating motion; a retainer is fixed on the stem (pseudo – piston) which has the purpose of preventing the stem from coming out from the casing when it is subjected to the gas pressure. The force produced by the gas spring is the resulting one from the thrust of the pre-load pressure on the stem section. The gas spring performs always the total theoretical run, if it does not meet mechanical stops before it.
A version with built-in mechanical lock is also available.