Patent ID: 7647735
Filing Date: 2010-01-19
Classification: E04D,E06B

Abstract:
1. A roof window comprising a window frame having an inner surface, a sash frame, and a covering, each of the window frame and the sash frame including a top frame member, a horizontally-extending bottom frame member and two lateral frame members, said roof window comprising drainage grooves, characterized in that a first drainage groove is formed in the window frame, and a second drainage groove is formed in the sash frame, wherein the window frame has an inner surface adjacent to the sash frame, wherein the sash frame has an outer surface adjacent to the window frame, wherein the first drainage groove has a concave surface extending along the inner surface of the window frame and formed with a flange protruding from the inner surface of the window frame, wherein the second drainage groove has a concave surface extending along the outer surface of the sash frame, and includes a flange protruding from the outer surface of the sash frame, wherein the first drainage groove formed in the inner surface of the window frame constitutes a complex drainage channel for the window frame, while the second drainage groove formed in the outer surface of the sash frame constitutes a complex drainage channel for the sash frame, and wherein the complex drainage channel for the window frame comprises the first drainage groove formed with the lateral and bottom members of the window frame, while the complex drainage channel for the sash frame comprises the second drainage groove formed with the lateral and bottom members of the sash frame, wherein the flange of the second drainage groove in the lateral frame members of the sash is spaced horizontally from the inner surface of the window frame, and wherein the complex drainage channel for the window sash has a drainage exit.