Static structures (e.g. – buildings) – Wall – ceiling – or floor designed for utilities
Reexamination Certificate
1999-04-02
2003-03-11
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Wall, ceiling, or floor designed for utilities
C052S220800, C052S232000, C052S742130, C052S741400
Reexamination Certificate
active
06530187
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus and method for providing a sealed passage through partitions such as walls, floors, and ceilings for wires, pipes and the like.
FIG. 8
shows a prior art passage structure
37
. The passage structure
37
is located in a through hole
34
, which is formed in a partition such as a wall or a floor. The passage structure
37
includes a conduit
33
and fireproof material
35
. The conduit
33
is inserted in the through hole
34
to pass through the partition
32
. The fireproof material
35
, which is material such as mortar or rock wool, fills the annular space between the outer surface of the conduit
33
and the inner surface of the through hole
34
. A wire
36
passes through the conduit
33
and thus passes through the partition
32
.
When the fireproof material
35
is put between the outer surface of the conduit
33
and the through hole
34
, the pipe
33
must be retained at a certain position by a worker. The work is troublesome and difficult.
Generally, it takes two to three days for the fireproof material
35
to harden. The wire
36
cannot be inserted through the conduit
33
while the fireproof material
35
is hardening. This delays the construction work. There may be cases where the conduit
33
sinks in the fireproof material
35
due to its weight before the fireproof material
35
hardens. This produces a space between the conduit
33
and the fireproof material
35
, and the conduit
33
is not firmly fixed in the partition
32
. Further, extra work is necessary to fill the space with additional fireproof material
35
. This lowers efficiency and increases construction costs.
SUMMARY OF THE INVENTION
The objective of the present invention is to provide a partition passage and an installation method that efficiently and effectively produces sealed passage between an inner surface of a through hole and an outer surface of a conduit.
To achieve the above objective, the present invention provides a passage structure for permitting an object to pass through a partition. A through hole is formed in the partition. A conduit is located inside the through hole. A foaming material fills a space between the outer surface of the conduit and the inner surface of the through hole by expansion. The foaming material is expanded after the conduit is located in the through hole and the foaming material, after expanding, seals the space between the inner surface of the through hole and the outer surface of the conduit.
The present invention further provides a method for sealing a space between an inner surface of a through hole and an outer surface of a conduit. The through hole is formed in a partition. The method includes the following steps: inserting the conduit into the through hole; locating a foaming material between the inner surface of the through hole and the outer surface of the through member; and expanding the foaming material by stimulating a reaction in the foaming material.
Other aspects and advantages of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.
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Glessner Brian E.
Mirai Industry Co., Ltd.
Senterfitt Akerman
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