The gas spring is usually mounted to the tail gate or hood/bonnet and makes easy of lifting/lowering the coverlet. The gas spring consists of pressure tube(Cylinder), piston rod(Shaft), oil seal and other components. After sealing the Nitrogen gas in the pressure tube, it is sealed not to leak, then piston rod is operating. It is supposed to operate owing to the difference of internal pressure and load in which are depending on Volume transformation in the pressure tube.


A gas spring is utilized for the adjustment of reaction force of application, which requires convenience and easiness of operating.

1) Sustaining of the constant elasticity change rate even in the high reaction force and long stroke.
2) Compact design and appearance.
3) Easy mounting and installing in any application at any position.
4) Automatic operational damping function without any additional adjustment device.
5) Compression and extension speed adjustable.
6) Reaction force will be adjustable at any time of usage (in case of charge up).
7) The unique gas filling system.
8) The first localized gas spring in Korea(Design registered No.16790).
Function of OF Gas spring

A gas spring can be effectively used to offset the reaction force of coverlet or opening & closing cockpit, which has heavy weight. It makes easy control of material which is hard to deal with, and it makes ideal position of lifting and lowering safely. Against of the other general springs, gas spring makes little difference of force with long stroke.


A gas spring is composed of sealed tube with piston rod(shaft), piston, oil seal and the other Components. Compressed insert nitrogen gas and minimum operating oil was included inside of the tube as well.


The equivalent pressure inside of the tube("P" on the picture) is the same as that of both side of piston.


Reaction Force Diagram

While the rod(shaft) is pushed into the cylinder, the part of gas volume is replaced with pressure as inside pressure is slightly increasing. This replacement causes reaction force as function of stroke. This reaction force of gas spring is also affected by friction force(both in the dynamic and static).

P1: The force measured at 10mm from full extension. 
P2: The force measured at 10mm compression after complete extension. 
P3: The force measured at 10mm extension after complete compression. 
P4: The force measured at 10mm from full compression 
#P1~ P4 values are measured when the gas spring is completely static stopped for 4-5 seconds.