초록 ▼

A shutter for withstanding hurricane wind forces has an outer rectangular frame formed by four U-shaped channel members. An inner rectangular frame, also formed of four U-shaped blade channels, is mounted within the U-shaped channels of the outer frame. A plurality of Z-shaped blades extend horizont

A shutter for withstanding hurricane wind forces has an outer rectangular frame formed by four U-shaped channel members. An inner rectangular frame, also formed of four U-shaped blade channels, is mounted within the U-shaped channels of the outer frame. A plurality of Z-shaped blades extend horizontally between the vertical U-shaped inner blade channels and are secured in an angular position by fasteners. The blades each have a pair of horizontal end flanges which are secured at opposite ends to the inner frame, and have an intervening angled panel of reduced thickness to enable the blades to flex and absorb the wind forces. Longitudinal fins are formed on the inner frame channels and engage portions of the outer frame to radiate wind forces exerted on the blades to the outer frame. A pair of spring-biased plunger rods are mounted at the bottom ends of the outer frame for securing the shutter in a locked position. The shutter is assembled by fastening the blades at their ends to two spaced inner blade channels, sliding the inner frame members within the outer frame members, and then securing the outer frame members together by corner braces to trap the inner frame and blades therein.

대표청구항 ▼

[ We claim:] [1.] A shutter construction including:an outer rectangular frame defined by horizontal and vertical frame channels, said frame channels being similar to each other, each being U-shaped in cross section defined by an end wall and spaced parallel side walls, and corner braces securing tog

[ We claim:] [1.] A shutter construction including:an outer rectangular frame defined by horizontal and vertical frame channels, said frame channels being similar to each other, each being U-shaped in cross section defined by an end wall and spaced parallel side walls, and corner braces securing together adjacent ends of said frame channels to form said outer rectangular frame;an inner rectangular frame defined by horizontal and vertical blade channels, each having side walls, with said inner frame being mounted and contained within the outer frame;a plurality of blades mounted within the inner frame and extending horizontally between the vertical blade channels, said blades being generally Z-shaped in cross section having a pair of end flanges and a panel extending angularly therebetween, said panel being thinner than said end flanges, whereby said panels will flex upon impact forces being exerted thereon transferring said forces to the said end flanges; anda plurality of fins formed on the side walls of the vertical blade channels and extending toward adjacent vertical side walls of the outer frame channels to radiate impact forces exerted on the blades into the outer frame channels.