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Rigid in Tension Locking Gas Springs

Rigid in tension locking gas springs have oil on both sides of the piston. A floating piston that separates it from the gas in the enclosed tube contains this oil. Since oil is incompressible, when a tension load is applied to the locked rod the oil between the nose bearing and the piston will not compress and the rod cannot move. The movement permitted in compression is significantly less than experienced on a flexible locking gas spring. In addition, because the oil is always held between the piston and nose bearing (containing the main seal), a rigid in tension spring can be used in any orientation.

Applications for rigid in tension locking springs include hospital beds, aircraft, coach and rail seat, back recline control, and support systems.


Flexible 10/23Flexible 10/28
Body diameter B 23 28
Admissible P1 force (P1 is the force 5mm from full extension) from 34 to 270 Pounds from 34 to 270 Pounds
Maximum force required to depress the plunger (P2 is the force 5mm from full compression) 14% of force P2 14% of force P2

Calculate the shoulder length for a flexible locking gas spring

Shoulder Length = (stroke x multiplier) + Shoulder length constan


Flexible 10/23Flexible 10/28
Multiplier 2.5 2.5
Shoulder length 3.66" 3.98"
K factor obtained (P2/P1) 1.5 1.3

Example - Calculation of shoulder length for a rigid in tension locking gas spring with a 28mm body and a stroke of 120mm: Minimum shoulder Length = (4x2.5) + 3.98 = 11.98"

Rigid in Tension Lockable Gas Strut

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