Operating device for window openers, screening arrangements and similar devices

An operating system for closure devices, the devices including window openers and screening arrangements, said system comprising

• a separate operating rod having at one end a hook-shaped operating element for disengageable connection with a rotatable coupling element connected to said device,
• said coupling element having the form of an eyelet with a first aperture with a center and having an area which is considerably larger than the cross-section of the hook-shaped operating element such that at the insertion of the hook-shaped operating element in said first aperture, the coupling element can be turned by the operating rod while simultaneously pulling the operating rod,
• wherein said coupling element further comprises a narrowed additional aperture with a center and in communication with the first aperture, the centers of the first aperture and the additional aperture being mutually off-set, to receive and securely engage with the hook-shaped operating element.