Abstract

A method for altering the spring constant (k) of a torsion spring for a roller blind, the method including (i) locating a dampener at a predetermined length along a longitudinal axis of the torsion spring, and (ii) tightening an end of the torsion spring against the dampener to increase the spring constant. Further disclosed is a roller blind system having a cylinder, a fabric attached to the cylinder for winding and unwinding from said cylinder, a torsion spring and a damper moveable along the longitudinal axis of the spring.

IPC Classes  ?

• E06B 9/90 - Safety measures against dropping or unauthorised openingBraking or immobilising devicesDevices for limiting unrolling automatic for immobilising the closure member in various chosen positions
• E06B 9/42 - Parts or details of roller blinds, e.g. suspension devices, blind boxes
• E06B 9/60 - Spring drums operated only by closure members

Abstract

A motorised system for a spring assisted roller blind, the system comprising: a motor having a tubular motor body and a drive spindle; a bi-directional spring clutch operative to engage the tubular motor in one of two modes, the first mode being to frictionally engage the motor body in a first direction of movement, and a second mode being to disengage the motor body, and a rotatable cylinder for winding a sheet of blind fabric.

IPC Classes  ?

• E06B 9/72 - Operating devices or mechanisms, e.g. with electric drive comprising an electric motor positioned inside the roller
• E06B 9/90 - Safety measures against dropping or unauthorised openingBraking or immobilising devicesDevices for limiting unrolling automatic for immobilising the closure member in various chosen positions
• E06B 9/322 - Details of operating devices, e.g. pulleys, brakes, spring drums, drives
• E06B 9/58 - Guiding devices

Abstract

The invention relates to coupling at least two window coverings and, provides apparatus for coupling a first and second window covering in substantially coaxial alignment comprising the combination of a bracket and a bearing insert, where: the bracket comprises at least one first portion adapted for fixing the bracket to a structure and a second portion comprising a combination of one or more generally C-shaped apertures; the bearing insert comprises a generally annular assembly with first and second side portions secured together by a hub portion, the hub portion having an outer surface configured as a truncated circle, wherein the truncated circle configuration of the hub portion is adapted to allow passage of the bearing insert into the C-shaped aperture and prevent passage out of the C-shaped aperture upon rotation of the bearing insert in the C- shaped aperture

IPC Classes  ?

• E06B 9/42 - Parts or details of roller blinds, e.g. suspension devices, blind boxes
• A47H 1/13 - Brackets or adjustable mountings for both roller blinds and drawable curtains
• E06B 9/50 - Bearings specially adapted therefor