U.S. patent application number 10/309846 was filed with the patent office on 2003-06-05 for wall lead-in for feeder liner.
Invention is credited to Forg, Christian, Hoffmann, Armin, Leibhard, Erich, Monden, Thomas, Munzenberger, Herbert.
Application Number | 20030101668 10/309846 |
Document ID | / |
Family ID | 7708028 |
Filed Date | 2003-06-05 |
United States Patent
Application |
20030101668 |
Kind Code |
A1 |
Monden, Thomas ; et
al. |
June 5, 2003 |
Wall lead-in for feeder liner
Abstract
A wall lead-in for at least one feeder line (10) and including
an element formed of an expandable material (11) and provided in an
intermediate annular space between a through-opening (7) formed in
a wall (8) and the at least one feeder line (10), and a
sleeve-shaped form member having an outer diameter corresponding to
a diameter of the through-opening (7), designed for surrounding the
feeder line (10) and arrangeable coaxially therewith, and formed of
a form element (1) made of a perforated strip material and having a
predetermined length.
Inventors: |
Monden, Thomas; (Stetten,
DE) ; Leibhard, Erich; (Munich, DE) ;
Hoffmann, Armin; (Landsberg, DE) ; Munzenberger,
Herbert; (Wiesbaden, DE) ; Forg, Christian;
(Buchloe, DE) |
Correspondence
Address: |
DAVID TOREN, ESQ.
SIDLEY, AUSTIN, BROWN & WOOD, LLP
787 SEVENTH AVENUE
NEW YORK
NY
10019-6018
US
|
Family ID: |
7708028 |
Appl. No.: |
10/309846 |
Filed: |
December 4, 2002 |
Current U.S.
Class: |
52/220.8 ;
52/342; 52/344; 52/443; 52/742.13 |
Current CPC
Class: |
A62C 2/065 20130101;
F16L 5/04 20130101 |
Class at
Publication: |
52/220.8 ;
52/342; 52/344; 52/443; 52/742.13 |
International
Class: |
E04C 002/52; E04B
009/00; E04F 013/04; E04B 001/00; E04G 021/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 5, 2001 |
DE |
101 59 575.1 |
Claims
What is claimed is:
1. A wall lead-in for at least one feeder line (10), comprising
means formed of an expandable material (11) and provided in an
intermediate annular space between a through-opening (7) formed in
a wall (8) and the at least one feeder line (10); and a
sleeve-shaped form member having an outer diameter corresponding to
a diameter of the through-opening (7), designed for surrounding the
feeder line (10) and arrangeable coaxially therewith, and formed of
a form element (1) made of a perforated strip material and having a
predetermined length.
2. A wall lead-in according to claim 1, wherein the perforated
strip material is a manually stretchable material.
3. A wall lead-in according to claim 1, wherein the form element
(1) has similarly formed side edges (3a, 3b) which overlap each
other in the sleeve-shaped form member.
4. A wall lead-in according to claim 1, wherein the form element
(1) is cut off of yardware reel (2).
5. A wall lead-in according to claim 1, wherein the form element
(1) has smooth side edges (5a, 5b) forming end edges of the form
member (1).
6. A wall lead-in-according to claim 5, wherein at least one side
edge is non-perforated.
7. A wall lead-in according to claim 5, wherein at least one of the
side edges (5a, 5b) has self-locking means (6a, 6b).
8. A wall lead-in according to claim 7, wherein the self-locking
means (6a, 6b) is one of continuous self-locking means and formed
of separate elements distributed over a circumference of the at
least one of side edges.
9. A method of sealing an intermediate annular space between a
through-opening (7) formed in a wall (8) and a feeder line (10),
the method comprising the steps of providing a form element (1)
formed of a section of a perforated strip material having a
predetermined length; manually plastically binding the form element
(1) about the feeder line (10) forming a sleeve-shaped form member;
inserting the sleeve-shaped form member axially in the
through-opening (7); and injecting, in an intermediate space
between the feeder line (10) and the form member, an expandable and
hardenable, formed material (11), the form member being secured to
the wall (7) by the formed material poured through perforation of
the form member.
10. A method according to claim 9, wherein the bending strip
includes closing the sleeve-shaped form member in a region (X) of
overlapping side edges thereof with locking means (6a, 6b) provided
over a circumference of the form member.
11. A method according to claim 9, wherein the providing step
includes cutting the form element (1) off a reel of a yardware
perforated material.
12. A method according to claim 9, wherein the expandable,
hardenable, foamed material comprises an intumescent material.
13. A method according to claim 12, wherein openings (4) of the
perforated form element have a size smaller than 50 mm.sup.2.
14. A fire-resistant led-in form element comprising an inherently
stiff perforated form element for being bent around a feeder line
(10) coaxially therewith and insertable into an intermediate
annular space between a wall through-opening (7) through which the
feeder line extends, and the feeder line (10); and intumescent
material means (11') provided on the form element (1) at least in a
region of the form element (1) to be located in the intermediate
annular space.
15. A fire-resistant lead-in form element according to claim 14,
wherein the intumescent material means (11') is provided on the
form element at least partially in form of a layer.
16. A fire-resistant lead-in form element according to claim 14,
wherein the form element (1) with the intumescent layer is bendable
about a feeder line (10) helicoidally several times over
itself.
17. A fire-resistant lead-in form element according to claim 14,
wherein the intumescent material means (11') is provided in form of
a layer covering opposite side edges of the perforated form element
(1).
18. A fire-resistant lead-in form element according to claim 14,
wherein openings (4) of the perforated form element (1) are of a
size smaller than 50 mm.sup.2.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a lead-in for feeder lines
such as current conductors and water conduits which extend through
through-openings formed, in particular, in hollow walls, such as
side walls, partitions and ceilings, and in particular to a lead-in
designed for bridging the hollow space of a hollow wall. The
present invention also relates to a method of forming such a
lead-in.
[0003] 2. Description of the Prior Art
[0004] German Publication DE-19915667 discloses filling an
intermediate annular space between a feeder line and the
through-opening with an expandable material such as a polymer foam.
The expandable material penetrates not unsubstantially into the
hollow space when a pressure, which is required for a complete
filling of the intermediate space, is applied.
[0005] German Publication DE-19955765 discloses closing an
intermediate space between the through-opening and a feeder line
with self-expandable band which is wound about the feeder line. The
band is capable to close a narrow hollow space in a wall. However,
a wide space such as exists, e.g., between walls of a formwork, the
band cannot bridge.
[0006] U.S. Pat. No. 5,040,351 discloses the use of a rigid sleeve
which is inserted into the intermediate space and which forms part
of the lead-in. Such sleeves are only suitable for walls in which
the opposite through-opening have the same diameter, and they
should be mounted before the feeder line itself is inserted.
[0007] German Publication DE-25 51 693 discloses filling of the
intermediate space with mineral wool, with sealing of the hollow
space with expanded sheet metal.
[0008] U.S. Pat. No. 5,058,346 discloses filling the volume of the
intermediate space with spherical expanded sheet metal insertable
into each other, which provides for heat conductance between the
wall and the feeder line.
[0009] German Publication DE-35 35 251 discloses a dowel for
securing a lead-in to walls with a hollow space therebetween. The
dowel is cemented in a blind bore and has a radially outer,
surrounding dowel sleeve that is formed of a metal grid or a
perforated sheet metal and is inserted into the bore
beforehand.
[0010] German Publication DE-36 43 708 discloses using a sheet
metal or metal cloth covered with intumescent material.
[0011] German Publication DE-196 20 898 discloses use of an
intumescent scotch tape.
[0012] An object of the present invention is to provide a wall
lead-in for feeder lines and suitable for bridging the hollow space
of a hollow wall.
SUMMARY OF THE INVENTION
[0013] These and other objects of the present invention, which will
become apparent hereinafter, are achieved by a lead-in having
intermediate spacer means formed of an expandable material and
provided between a through-opening formed in a wall and the at
least one feeder line, and a sleeve-shaped form member, having an
outer diameter corresponding to a diameter of the through-opening,
designed for surrounding the feeder line and arrangeable coaxially
therewith, and formed of a form element made of a perforated strip
material having a predetermined length.
[0014] By using a sleeve-shaped, rigid form member, which at least
partially bridges the wall hollow space, a necessary pressure can
be used for filling the intermediate space between the
through-opening and the feeder line with expandable and hardenable
material. The expandable and hardenable material which pours at
least partially out through the openings of the perforated form
member, after hardening, reliably secures the form member and the
feeder line with the wall.
[0015] Advantageously, the perforated form element, of which the
form member is formed, is formed of a manually plastically
stretchable material, advantageously, of expandable metal sheet,
metal cloth, perforated sheet metal, at least 50% of which is
occupied by openings, or of a plastic grid 50% of the surface of
which is occupied by openings. The form elements can be manually
formed with different thicknesses.
[0016] Advantageously, the perforated form element, upon being
formed into a sleeve-shaped, form member, has a region formed by
overlapping side edges having substantially the same width. The
form element is usually cut off from a yardware band and with a
length corresponding to the circumference of a wall through-opening
into which the to-be formed form member is to be inserted.
[0017] Advantageously, the sleeve-shaped form member has axial end
edges which are formed by side edges of the form element which,
optionally, can be free of perforation. This prevents any
possibility of damage of regions projecting beyond the wall
surface.
[0018] Advantageously, the side edges are provided with a
continuous self-locking element or with spaced from each other,
self-locking sections, which insure, upon forming the sleeve-shaped
form member, fixed connection of the end edges with each other.
[0019] For sealing the intermediate space between the
through-opening and feeder line, first a form element is cut off of
a perforated strip material available in form of yardware, taking
into consideration the circumference of the wall through-opening,
the width of the overlapping region of the to-be-formed
sleeve-shaped form member, and loss of length upon cutting. Then,
the form element is plastically stretched on the wall and is bent
around the feeder line, whereby the sleeve-shaped form member is
formed. Finally, the overlapping region is closed by using the
self-locking elements provided on the side edges of the form
element. Thereafter, the sleeve-shaped form member is inserted
through the intermediate space between the through-opening and the
feeder line, and the annular space between the form member and the
feeder line is filled with an expandable and hardenable, foamed
material which pours out through the perforated form member,
securing the form member and the feeder line to the wall.
[0020] According to the present invention, a fire-resistant lead-in
element can be formed by using a perforated form element e.g.
expanded metal in combination with intumescent material which
expands and fills the intermediate space upon occurrence of
fire.
[0021] A fire-resistant lead-in element includes a relatively stiff
perforated form element having an inherent stiffness and a
plurality of openings at its surface and is designed for being bent
around a feeder line coaxially therewith and insertable into an
intermediate space between a wall through-opening and the feeder
line, and a layer of an intumescent material provided on the form
element at least in a region of the form element to be located in
the intermediate space.
[0022] Advantageously, the size of the openings of the perforated
form element does not exceed 50 mm. As a result, the expandable
intumescent material only unsubstantially penetrates through the
form element. However, the form element remains plastically
deformable.
[0023] Advantageously, the entire perforated form element is
covered with the layer of the intumescent material, so that the
intumescent material is uniformly distributed over the form
element, and the form element remains mechanically stable.
[0024] Advantageously, the perforated form element with a layer of
an intumescent material is bent about the feeder line helicoidally
several times over itself, with the radial dimension of the laps
being adapted to the intermediate annular space.
[0025] The fire-resistant lead-in form element has both its end
edges covered with a strip-shaped layer of an intumescent material,
which insures a reliable sealing the intermediate annular space on
opposite sides of the follow space, without penetration of the
intumescent material in the hollow space, which is ineffective in
the hollow space.
[0026] The novel features of the present invention, which are
considered as characteristic for the invention, are set forth in
the appended claims. The invention itself, however, both as to its
construction and its mode of operation, together with additional
advantages and objects thereof, will be best understood from the
following detailed description of preferred embodiments, when read
with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The drawings show:
[0028] FIG. 1 shows a reel of a perforated yardware material used
in forming a lead-in according to the present invention;
[0029] FIG. 2 shows a section of the yardware material shown in
FIG. 1 of which a lead-in form element is formed;
[0030] FIG. 3 shows the section of the yardware material shown in
FIG. 2 in a stretched condition;
[0031] FIG. 4 shows a detail IV in FIG. 3 at an increased
scale;
[0032] FIG. 5 shows a section of a hollow wall through which a
feeder line extends;
[0033] FIG. 6 shows a lead-in form element;
[0034] FIG. 7 shows formation of an intermediate annular spacer
between the form element and the feeder line;
[0035] FIG. 8 shows the lead-in formed as fire-resistant element;
and
[0036] FIG. 8A shows a detail VIII A in FIG. 8.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0037] FIG. 1 shows a reel 2 of a perforated yardware material of
which a section having a length L is cut for forming a lead-in form
element 1 according to the present invention.
[0038] FIG. 2 shows a cut-off section of the perforated material
having similarly formed side edges 3a, 3b.
[0039] FIG. 3 shows the same section as FIG. 2 cut in a stretched
condition, with the perforaton openings 4 occupying 50% of the
surface of the form element 1. The section is stretched manually
upon application of a force F to width B. This section has
non-perforated, smooth side edges 5a, 5b provided each with a
continuous self-locking mechanism 6a, 6b, which extends along the
entire length of the form element section and which is shown in
detail in FIG. 4.
[0040] FIG. 5 shows the formation of the lead-in form member. The
stretched perforated form element, which is shown in FIG. 3, is
bent about a feeder line 10 that extends through a hollow wall 8
having a hollow space 9. Upon bending the stretched form element 1
about the feeder line 10, the sleeve-shaped form member is formed.
As shown in FIG. 6, the sleeve-shaped form member has an
overlapping region X. The overlapping region X is closed with
self-locking mechanisms 6a, 6b which are provided, respectively, on
side edges 5a, 5b that form end edges of the sleeve-shaped form
member. After the sleeve-shaped form member is formed, it is
inserted through the through-opening 7 in the wall 8, as shown in
FIG. 5.
[0041] As shown in FIG. 7, in the ring space between the form
member and the feeder line 10, an expandable and hardenable, formed
material 11 is injected.
[0042] Generally, FIGS. 1, 2, 3, 5, and 7 illustrate the method of
forming a wall lead-in according to the present invention.
[0043] FIG. 8 shows formation of the lead-in as a fire-resistant
element. A stretched, perforated form element 1, which is formed as
an intralaminar prefolded metal grid with mesh size 5 mm.times.5 mm
is bent helicoidally several times about the feeder line 10, which
extends through the through-opening 7 formed in a hollow wall 8
with a hollow space 9. The opposite, spaced ends of the
sleeve-shaped member are provided each with a strip-shaped layer
formed of an intumescent material 11. The strip-shaped layer has a
width of about 20 mm and a thickness of about 5 mm. The strips of
the intumescent material are provided axially outside of the hollow
space 9 adjacent thereto.
[0044] Though the present invention was shown and described with
references to the preferred embodiments such are merely
illustrative of the present invention and are not to be construed
as a limitation thereof, and various modifications to the present
invention will be apparent to those skilled in the art. It is,
therefore, not intended that the present invention be limited to
the disclosed embodiments or details thereof, and the present
invention includes all of variations and/or alternative embodiments
within the spirit and scope of the present invention as defined by
the appended claims.
* * * * *