A gas spring (10) for forming equipment, a piston rod (16) for the gas spring (10), and a shock collar (18) for the gas spring (10) carried by the piston rod (16). The shock collar (18) may be resiliently flexible, and plastically deformable so as to at le...

A gas spring (10) for forming equipment, including a piston (12) received at least partially in a cylinder (14) for reciprocation between extended and retracted positions, and including a throttling passage (94) disposed between the piston (12) and the cyl...