Patent ID: 6612359
Filing Date: 2003-09-02
Classification: A01K,F24F

Abstract:
Slider curtain for controlling ventilation through an open wall of an agricultural livestock building, comprising:a lower curtain assembly mounted on said wall and including a horizontal upper hem pipe supported at a midway vertical position on said wall, a horizontal lower hem pipe, and a flexible fabric lower curtain supported between said upper and lower hem pipes; an upper curtain assembly mounted on said wall at a vertical position above and overlapping the position of the upper hem pipe of the lower curtain assembly, the upper curtain assembly including a horizontal upper hem pipe, a horizontal lower hem pipe, and a flexible fabric upper curtain supplied between the associated upper and lower hem pipes, said upper and lower hem pipes of the upper curtain assembly being free to travel vertically; and a hoisting mechanism on said wall and coupled to the upper hem pipe of the upper curtain assembly and adapted for raising and lowering said upper curtain assembly between a raised severe weather position in which ventilation through said wall is closed off and a lowered mild weather position in which an upper portion of the wall is open to permit ventilation.