Rigid in compression locking gas springs have oil on both sides of the piston so that the chamber between (where the rod enters the body) and the piston are always full of oil. The oil is contained in the closed end of the tube and a floating piston retains the gas in the nose bearing end chamber. When a compressive load is applied to the locked rod, the oil between the piston and the closed end of the tube does not compress and the rod cannot move. Applications include operating, massage and veterinary tables and wheel chair recline and support systems amongst many others.

Rigid in tension locking gas springs have oil on both sides of the piston so that the chamber between (where the rod enters the body) and the piston are always full of oil. This oil is contained by a floating piston that separates it from the gas in the enclosed tube. Since oil is incompressible, when a tension load is applied to the locked rod the oil between the nose bearing and the piston does not compress and the rod cannot move. Applications for rigid in tension locking springs include hospital beds, aircrafts, coach and rail seat back recline control and wheel chair recline and support systems.

Rigid metal tube arms are suitable for the local extraction of welding fumes, gases, damps, slight dusts, and solvents. The rigid metal tube arms consist of an interior spring supported parallelogram linkage and two epoxy-coated aluminum pipes as well as three flexible hose pieces at the joints.