Patent ID: 7775256

Claim:
A curved brace window sash edge connection fitting for use in a window structure which is installed in an angular opening portion of an architectural building and is formed of a modular set of a window frame and a window sash coupled with the window frame, in which the window sash edge connection fitting is positioned at the edge of the window sash, characterized in that the window sash edge connection fitting is curved so that the outer circumference of the window sash edge connection fitting is congruous with the inner circumference of a curved brace in a window frame edge connection fitting in correspondence to the curved brace window frame edge connection fitting, and a curved first packing insertion groove is formed on the outer circumference of the window sash edge connection fitting wherein the curved packing insertion groove is packed with a packing member, and the curved brace window frame edge connection fitting for use in the window structure which is installed in the angular opening portion of the architectural building and is formed of a modular window frame, in which the window frame edge connection fitting is positioned at the angular edge of the window frame, characterized in that the window frame edge connection fitting comprises a brace formed in an edge on the inner circumference of the window frame edge connection fitting, wherein the brace is curved, and the outer circumference of the window frame edge connection fitting is angularly formed so as to be congruous with the angular edge of the angular opening portion, and a curved second packing insertion groove is formed on the outer circumference of the window edge connection fitting wherein the second packing insertion groove is packed with a packing member.