Friction gas springs
The caravan and (pleasure) yachting industry requested an alternative to the conventional window arms for top-hung hinged windows.
Tricky to open
In the past, (caravan) windows were generally opened in two ways: either stepless using a catch to secure the arm or via a ratchet arm. Both methods have disadvantages: the former requires one hand to hold the window in the correct position and a second hand to tighten the catch, while the latter requires the window to be opened all the way before it can be closed.
Friction gas spring
The ACP friction gas spring opens the window smoothly to any required position. The window is closed by simply pulling it in against the friction (without the need for unlocking or further opening).