Tilt and lift mechanism for venetian blind
AssigneeOhline Corporation
InventorParker I. Tsuhako
Life of this patent
Estimating the term…
Abstract
A venetian blind slat-tilting mechanism including a pair of top-mounted bars to which tilt strings are attached at opposed positions and which are attached together through a nut threaded to a rod. The rod is connected to a pulley which is turned by a tilt-adjusting cord. The motion of the pulley turns the rod and moves the nut laterally, thus moving both bars and tilting the blind's slats. Additionally a slat-lifting mechanism is provided in the form of lift strings running over support pulleys to raise and lower the blind.
Claims25
A Venetian blind having a plurality of slats supported in a spaced relationship by a support structure comprising:
- a headrail;
- at least a pair of lift strings threaded through the slats in positions displaced longitudinally of the headrail on opposite sides of the center plane of the blind, traversing the headrail over guide means, and exiting the headrail;
- at least a pair of tilt ladders having strings positioned adjacent said lift strings, adapted to support and tilt said slats, and passing into said headrail;
- drive means including drive members connected to the tilt ladders, the drive members being connected together to move in unison longitudinally in the same direction to effect tilting of said slats, and a carrier coupled to at least one drive member and threadably engaging a pulley shaft;
- a shaft and associated drive pulley, the shaft being oriented longitudinally of the headrail and threaded along at least part of its length for engaging the carrier;
- and
- a tilt string coupled to rotate the drive pulley;
- the carrier and shaft being effective to translate rotation of said pulley to longitudinal movement of the drive members.
A tilt mechanism for Venetian blinds comprising:
- a threaded rotatable rod;
- a pulley operatively attached to said rod and adapted to be driven by a tilt string to rotate said rod;
- an internally threaded carrier mounted on said rod and movable longitudinally of the rod in response to rotation of said rod;
- tilt means coupled to said carrier and extending longitudinally from said carrier over associated tilt ladders, the tilt means comprising at least a pair of drive members coupled together to move in unison in the same direction in tilting the tilt ladders;
- and
- plural paired tilt ladder strings coupled to said tilt means at opposed lateral positions thereon and adapted to laterally position and tilt plural slats of said blind,
- whereby rotation of said rod by said pulley longitudinally moves said carrier and said tilt means and simultaneously lifts one string of each pair of tilt ladder strings while lowering the other string of each pair.
Dependencies are inferred from the claim text.