Patent ID: 9556672
Date: 2017-01-31
CPC Classifications: E06B

Claim:
1. A roll-up door for use at a doorway, wherein the doorway extends vertically between a lintel and a floor, the roll-up door comprising: a track system to be mounted proximate the doorway; a curtain having a leading edge that is to be movable selectively to a closed position and an open position, the curtain blocking the doorway when the leading edge is at the closed position, and the curtain unblocking the doorway when the leading edge is at the open position; a track roller to vertically travel along the track system, the track roller to be rotatable relative to the track system, the track roller to be provided on a carriage; a windbar to be coupled to the track roller, the windbar to be horizontally elongate and higher than the leading edge of the curtain when the leading edge is at the closed position, the windbar being closer to the lintel when the leading edge of the curtain is at the open position than when the leading edge is at the closed position, the windbar defining an axis along a length of the windbar, and the windbar to be vertically movable with the track roller and to be rotatable about the axis relative to the curtain and the carriage; and a suspender to carry the carriage and the windbar, the suspender to be directly connected to the carriage.