a superior spring, primarily because if offers more safety to the homeowner and better balances the door to provide smoother operation
a type of a spring that applies a force through a torsion or twisting motion to move or return a part or component
A helical wound spring mounted inside the barrel used to counterbalance rolling grilles or closures.
A spring which derives its usefulness by trying to return to its original shape when subjected to a load traveling around its axis.
One of a pair of garage door springs wound up on a rod above the garage door opening. Wound up when the door is down.
A torsion spring or torsion pendulum is an elastic material that reacts against torsion (twisting motion). In particular, the more one twists it, the more force it takes to twist it further. A torsion spring is often made from a wire, ribbon, bar, or coil.
