Static structures (e.g. – buildings) – Wall – ceiling – or floor designed for utilities – Having a passageway through the entire wall – ceiling – or...
Reexamination Certificate
1999-10-14
2001-07-10
Kent, Christopher T. (Department: 3635)
Static structures (e.g., buildings)
Wall, ceiling, or floor designed for utilities
Having a passageway through the entire wall, ceiling, or...
C052S232000
Reexamination Certificate
active
06256948
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a fire-resistant passage for one or more lines, such as cables or tubes/pipes, in a wall. Such a wall can be present in ships, and surround a space there which in case of a fire at the other side of said wall has to be protected against said fire.
Such fire-resistant passage systems are known from many patent documents. U.S. Pat. Nos. 4,702,444, 4,712,342, 4,061,344, 4,219,173 and 4,424,867 are mentioned.
In particular European patent application 0,534,563 is referred to, from which a fire-resistant system is known with a wall opening and a series of sleeves filling said wall opening, which sleeves are made from a synthetic rubber-like material referred to as FRR/LEHF.
This material expands under the influence of heat in order to fill the openings that are present between the tubes and in the empty tubes, so that after that a closed barrier is formed against fire and the passage through the wall does not form a possible fire leak.
The sleeves are provided with a longitudinal interruption in order to be placed easily around a cable or line to envelop them. For each diameter range of cable or pipe a rubber sleeve of a certain diameter is available. In the placed situation there is a group of sleeves of varying diameter, in some of which a pipe or cable is then led through. The end plane of the sleeves is then sealed off with the help of a fire-resistant gas and water-proof putty.
When it desired to lead through a further cable or pipe the putty is removed and the cable or pipe concerned is led through an accompanying still empty sleeve.
A drawback of said known system is that one has to think beforehand about which sleeves have to be placed, in connection with to the expectations about the cables and pipes to be led through now and in the future. Furthermore sleeves of varying diameters have to be at one's disposal, which requires additional effort and space as regards the stock control.
OBJECTS OF THE INVENTION
The invention has the object to improve on this, and to that end from one aspect provides a fire-resistant passage for one or more lines, such as cables or tubes, in a wall, comprising an opening in the wall, one or more lines extending through the opening from the one side of the wall to the other side thereof, and a number of profile sections made from material which expands under the influence of heat, which profile sections are situated adjacent to the lines in order to support them and to occupy the surface of the opening present adjacent to the lines, the profile sections having such a shape that radially they freely abut the lines concerned.
From another aspect the invention provides a fire-resistant passage for one or more lines, such as cables or tubes, in a wall, comprising an opening in the wall, one or more lines extending through the opening from the one side of the wall to the other side thereof, and a number of profile sections made from material which expands under the influence of heat, which profile sections are situated adjacent to the lines in order to support them and to occupy the surface of the opening present adjacent to the lines, the profile sections all being arranged free of suspension from the lines, or either loose from the lines.
With the measures according to the invention it is achieved that when a cable or pipe has to be added in the passage simply one or several profile sections can be removed in order to thus provide space for said cable or pipe. It will not be necessary any more then to have a sleeve with a specific suitable diameter for the cable or pipe to be led through at one's disposal in the passage beforehand.
The solution according to the invention makes it possible to let the profile sections be identical: after all they no longer have a (direct) dimensional relation with the cables and pipes to be led through.
Preferably the profile sections are each formed with an open passage situated outside of the lines. Said passage forms a longitudinally extending air chamber between both ends of the passage, which will be sealed off by putty in the usual manner. Said air chamber increases the initial resistance and retardation against heat transport through the passage, until the moment on which the heat has penetrated the profile section to such an extent that also the boundaries of the passage in the profile sections will expand toward each other.
Preferably the passage is circumferentially bounded by a circumferentially closed wall, as a result of which the initial insulating action will be increased.
Preferably the profile sections can be pressed in, so that in stacked situation they themselves are compliant under the influence of the weight of the lines situated above them, as a result of which a high filling degree can be achieved without undoing the advantageous aspects of the invention.
Preferably the profile sections are provided with transverse protrusions extending in profile section direction, which preferably are compliant. With little material, support is given by such protrusions, to lines that are possibly placed over it.
From another aspect the invention relates to a set of profile sections, suitable and destined for use in the fire-resistant passage according to the invention.
REFERENCES:
patent: 4245445 (1981-01-01), Heinen
patent: 4740404 (1988-04-01), Otsugu et al.
patent: 5194192 (1993-03-01), Seebode
patent: 5344106 (1994-09-01), Beele
Howard & Howard
Kent Christopher T.
Van Dreumel Andre
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