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Features & Main Functions
TECHNICAL DATAFeatures & Main Functions
What is the gas spring?
Gas spring is mainly installed on the tail gate or hood part of cars, making it easier to open and close the door.
Gas spring consists of Pressure Tube, Piston Rod, Oil seal, Oil and other accessories. It is sealed with nitrogen gas inside pressure tube so that it is not leaked out. It operates with difference in load as the pressure inside differs depending on change in volume of Pressure Tube.
The adventages of our Gas spring
GAS SPRING is useful to control the reaction force of application (target of mounting) requiring easy and convenient operation and to offset force feedback.

1) Keep certain level of elastic change ratio even with high force feedback and long stroke
(keep low change ratio under load).
2) Compact design and appearance.
3) Excellent level of assembly that can be easily mounted to any products.
4) Auto damping function in operation without additional damping control device.
5) Adjust extension and compression speed.
6) Adjust(upper) reaction force during use.
The functions of Gas spring
Gas spring can be most effective to offset the force feedback of opening and closure or lid of objects with relatively heavy load and weight. In addition, it safely positions the heavy objects difficult to handle and can ideally perform lowering or lifting function.
Its use is more diverse than other metals, machine and spring and featured to have various scope of reaction force,
smooth force diagram, compact size, simple mounting, shock absorption, damping, speed control and diverse use than other metals, machines and spring.
Components and Optimized Appearance
Gas spring is the sealed cylinder with Rod, Pressure Tube, Piston, Oil parts and other components. In addition, it contains compressed inertia gas(nitrogen as) and minute amount of oil inside cylinder.
Principle of Operation
Same pressure (P in the figure) inside pressure tube is same as those on both ends of piston.
When Rod rolls into inside Tube, internal pressure increases little bit and part of gas volume is replaced. It is the function of stroke and causes reaction force. Actually, reaction force of gas spring is affected by friction effect(FR) (of both dynamic and static type).
Reaction force diagram
Reaction Force Diagram is the graph that shows the degree of extension and compression with flat spring rate.
Difference in 2 lines in the figure is attributable to friction created during the process of extension and compression.
Measurement point in F1 and F4 is the point 10mm from perfect extension and perfect compression stroke.
Measurement should be performed at 20°C.

- Force Diagram -
P1 : value at 10 mm point before Piston Rod is completely extended.
P3 : value at the point of compressing Piston Rod 10mm.
P2 : value of points 10mm extended after perfectly compressing Piston Rod.
P4 : value of point 10mm compressed before perfectly compressing Piston Rod
# Provided, values of P1~P4 mean the value measured when completely stopping Piston Rod for over 4 seconds
at each point.(Static)