Patent ID: 7134243

Claim:
A profiled sash section for a window sash, said section holding a sole window pane and intended for being installed in an outer frame of a blast resistant window, said sash section comprising: a main member enabling inter-engagement between the profiled sash section and the outer frame; a window pane holding member for accommodating and securing an end portion of the window pane in said profiled sash section; a reinforcing member to support the end portion of the window pane and to transmit blast pressure, if incidentally applied to the window pane, to the main member; said sash section being characterized in that it includes therewithin damping means which is plastically deformable up to a predetermined limit for at least partially absorbing blast pressure energy applied to the window pane, wherein said damping means is shaped as a metal piece weakened at a particular portion, whereby the damping means is adapted to be deformed or broken by the blast pressure energy to partially absorb this energy.