Patent ID: 8915320

Claim:
A shutter system for controlling a flow of fluid through an entryway, the shutter system comprising: a plurality of louvers, including a top, intermediate, and bottom louver arranged substantially one above the other, each louver having a pivot axis and an actuating portion; and a mechanism configured to select a position for the shutter system between and inclusive of fully opened and fully closed by rotating each of the plurality of louvers about the respective pivot axis; wherein the mechanism is configured to engage each actuating portion and rotate each of the top, intermediate, and bottom louvers at distinct rates, and configured to commence rotating one of the top louver and the bottom louver prior to the instance when the intermediate louver commences being rotated, such that the bottom louver commences being opened prior to the instance when the intermediate louver commences being opened and the intermediate louver commences being opened prior to the instance when the top louver commences being opened.