Patent ID: 8469171

Claim:
A spring loaded brake for an actuator for driving a household screen, comprising: a helical spring having opposite ends formed as lugs which extend radially inward relative to a central axis of the spring, a friction piece including a substantially cylindrical friction surface against which at least one turn of the spring presses radially, an input piece for contacting at least one lug of the spring so as to drive the spring in rotation about the central axis of the spring in a direction that reduces a force of contact between the spring and the friction surface, an output piece for contacting at least one lug of the spring so as to drive the spring in rotation about the central axis in a direction increasing the force of contact between the spring and the friction surface, and spaced end stops positioned on opposite ends of the spring and being joined to one another so as to always rotate as one about the central axis of the spring and each of which includes a portion which is engaged to stop an axial movement of the spring, wherein one end stop limits the axial movement of the spring in a first direction and the other end stop limits the axial movement of the spring in a second direction opposite to the first direction.