Patent ID: 6493999
Filing Date: 2002-12-17
Classification: E04D,E05D,E05F,E05Y

Abstract:
A roof window comprising:a main frame structure for stationary connection with supporting means of a roof structure, and a window frame structure carrying a glazing element, the main frame and window frame structures having respectively a plurality of members, each of which members extends in a longitudinal direction between a first and a second end; wherein said window frame structure is connected with the main frame structure by means of at least one hinge connection at a respective first member of the main frame and window frame structures to allow the window frame structure to be pivoted about a pivot axis parallel with the longitudinal direction of said first members with respect to the main frame structure to an opening angle, said hinge connection being disengageable to allow the window frame structure to be removed from the main frame structure, said at least one connection including at least one pair of first and second connecting members connected with the main frame and window frame structure, respectively, a securing device being provided for maintaining the engagement between the connecting members of said pairs within a predetermined range of the opening angle of the window frame structure; said securing device including at least one torsion member positioned at a respective end of said first members of the main frame and window frame structures, said at least one torsion member being torsionally biased in the opening direction of the window frame structure with respect to the main frame structure and including engagement means for engagement with corresponding engagement means positioned at a distance from said pivot axis along a second window frame member adjacent said first member of the window frame structure within said predetermined range of the opening angle.