Patent ID: 6755259
Filing Date: 2004-06-29
Classification: A62C

Abstract:
A method of feeding fire-retardant medium from a first side of a wall shell structure to a second side thereof, the method comprising:positioning a rescue boom adjacent the first side of the wall structure; piercing the wall structure by advancing at least a portion of an elongated piercing tool provided on the rescue boom from the first side of the wall structure to the second side thereof by operating an actuator provided in operative engagement with the piercing tool; maintaining the boom substantially stationary during the piercing step; feeding the fire-retardant medium through at least one longitudinal channel provided in the piercing tool and through at least one nozzle connected to the channel to the second side of the wall structure; engaging a plunger provided on the boom with the first side of the wall structure to be pierced; and advancing the piercing tool through the wall structure only after the plunger is engaged with the wall structure by a predetermined force.