Roof window arrangement

A window arrangement comprising:

• a. a frame including a plurality of members jointly bounding an opening in said frame,
• 1. one of said members extending horizontally in the normal, installed condition of said frame, and
• 2. two other members extending downward from said one member in said condition and being separated by said opening;
• b. a casement movable toward and away from a closing position in which said casement closes said opening;
• c. elongated link means having a first end portion fastened to said frame for pivotal movement of said link means about a first axis fixed relative to said link means and to said frame, said first axis being adjacent said one member, said link means having a second end portion fastened to said casement for pivotal movement of said casement relative to said link means about a second axis spaced from said first axis and remote from said one member and parallel to said first axis, said second axis being fixed relative to said casement and to said links;
• d. locking means for locking said casement to said link means for joint movement of said casement with said link means about said first axis toward and away from said closing position of said casement;
• and
• e. two slide members on said casement respectively engaging said two other members of said frame for sliding movement on the engaged slide members toward and away from said one member during said pivotal movement of said casement about said second axis while said link means pivots about said first axis, said slide members abuttingly engaging said two members in said closing position of the casement and moving away from said two members during said joint movement of the casement away from said closing position.