초록 ▼

A system for venting smoke and fumes from selected floors of a multi-story building comprising a vertical smoke pipe or shaft which extends from the basement to the roof of the building and a plurality of vent units disposed along the smoke shaft, one being associated with each floor of the building

A system for venting smoke and fumes from selected floors of a multi-story building comprising a vertical smoke pipe or shaft which extends from the basement to the roof of the building and a plurality of vent units disposed along the smoke shaft, one being associated with each floor of the building. Each unit includes a hinged door that opens by gravity force and is normally maintained closed by a latch mechanism that may be operated remotely by electrical or pneumatic means or may be operated manually. A thin metallic gasket seals the door to its frame and further functions as a spring means for urging the door open when the latch mechanism is released.

대표청구항 ▼

A vent for venting smoke from a floor of a multi-story building and carrying the smoke via a vertical shaft in the building, said vent comprising; a metallic frame comprising peripheral wall means, means for securing the wall means of the frame in an opening in a wall defining the shaft, said periph

A vent for venting smoke from a floor of a multi-story building and carrying the smoke via a vertical shaft in the building, said vent comprising; a metallic frame comprising peripheral wall means, means for securing the wall means of the frame in an opening in a wall defining the shaft, said peripheral wall means comprising vertical walls including on one side of the frame at the inner side of the shaft wall an inwardly facing hinge receiving edge, a door dimensioned to fit within the wall means defining the frame, hinge means including one hinge part secured along the hinge receiving edge of the wall means and another hinge part secured to the door for hingedly supporting the door from the frame along a non-vertical axis so that the door is permitted to swing open by gravity into the shaft, and latch means including latch parts carried by the door and frame, respectively, and means disposed outwardly of the door and frame for releasing the latch parts to permit the door to open.