Patent ID: 8857494

Claim:
A window treatment comprising: a covering material having a top end and a bottom end; a bottom bar coupled to the covering material at the bottom end, the bottom bar being elongate along a lateral direction; a drive shaft located adjacent the top end of the covering material, the drive shaft operable to raise and lower the covering material; a lift cord rotatably received around the drive shaft and extending to the bottom bar, such that rotation of the drive shaft in a first direction raises the covering material, and rotation of the drive shaft in a second direction lowers the covering material; and a lift cord adjustment mechanism coupled to the bottom bar, the lift cord adjustment mechanism comprising a pulley having a circumferential groove and being rotatably coupled with respect to the bottom bar, such that a portion of the pulley protrudes relative to an exterior surface of the bottom bar, wherein the lift cord is secured relative to the groove, such that rotation of the pulley causes the lift cord to wrap around the pulley within the groove, thereby adjusting an amount of the lift cord that extends from the drive shaft to the lift cord adjustment mechanism.