Patent ID: 9388837
Filing Date: 2016-07-12
CPC Classification: A47H,F16B,Y10T

Claim Text:
1. A rod assembly, for supporting a curtain or other treatment at an architectural opening in a structure, which comprises: a tube assembly comprising a locking assembly, contained within the tube assembly proximate the first end of the second tube, comprising wherein rotation of one tube relative to the other tube causes the sleeve to move lengthwise along said screw length toward one of said screw body ends, wherein the screw threads at a portion of the length of the screw expand the sleeve radially outwardly so the sleeve frictionally engages the bore of the first tube, thereby locking the telescoped tubes lengthwise with respect to each other; wherein, at said portion of the screw length where sleeve is expanded radially outwardly to frictionally engage and lock the telescoped tubes the thread of the screw changes in pitch or in size of thread profile with distance from the screw body end to which the screw is connected.