Patent ID: 6467714
Filing Date: 2002-10-22
Classification: E06B

Abstract:
A winding mechanism for a roller blind, the mechanism including:a stationary rod (2) held in place by an external fixture; a tube (T), the stationary rod (2) being located inside the tube (T) and the tube (T) being rotatable on an axis about the stationary rod (2); a raising spring (3), located inside the tube (T), acting between the tube (T) and the stationary rod (2) to provide a torque on the tube (T) relative to the stationary rod (2) for winding the roller blind onto the tube (T); a non-rotating threaded piston rod (18) fixed relative to the stationary rod (2) and being located inside the tube (T), the piston rod (18) having a threaded portion (9â€²) and a piston portion (19); and a cylinder (17), located inside the tube (T), operatively connected to the tube (T) for rotation with the tube (T) and operatively cooperating with the threaded portion (9â€²) for rotational and axial movements of the cylinder (17) relative to the piston rod (18) during rotation of the tube (T) to act upon air bounded within the cylinder (17) by the piston portion (19) of the piston rod (18).