U.S. patent number 3,742,669 [Application Number 05/233,557] was granted by the patent office on 1973-07-03 for elastic gap sealing device.
Invention is credited to Hans Mansfeld.
United States Patent |
3,742,669 |
Mansfeld |
July 3, 1973 |
ELASTIC GAP SEALING DEVICE
Abstract
The present sealing device is adapted for sealing gaps between
adjacent structural members especially pre-fabricated concrete
components. The present device includes a sealing strip of elastic
material such as rubber having two lateral strips interconnected by
a bridging strip with longitudinal folds in the bridging strip. The
lateral strips have a wedge shape with the narrower portion of the
wedge adjacent to the bridging strip and with the wider portion of
the wedge remote from the bridging strip. The wedge shaped lateral
strips are pressed into a U-shaped rail of rigid material such as
steel, whereby inwardly inclined legs of the rail tightly grip the
wedge shaped contour of the respective lateral strip.
Inventors: |
Mansfeld; Hans (5628
Heiligenhaus, DT) |
Family
ID: |
5801005 |
Appl.
No.: |
05/233,557 |
Filed: |
March 10, 1972 |
Foreign Application Priority Data
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Mar 10, 1971 [DT] |
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P 21 11 324.6 |
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Current U.S.
Class: |
52/396.07;
404/56 |
Current CPC
Class: |
E04B
1/681 (20130101); E04B 1/6813 (20130101); E04B
1/6807 (20130101) |
Current International
Class: |
E04B
1/68 (20060101); E04b 001/68 (); E04f 015/14 () |
Field of
Search: |
;52/396,393,471,62,573
;94/18,18.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Faw, Jr.; Price C.
Claims
What is claimed is:
1. In an elastic sealing device for sealing a gap between walls of
adjacent structural members by means of lateral sealing strips
interconnected by a bridging strip having longitudinal folds
therein, wherein the improvement comprises each lateral strip with
a wedge shaped contour whereby the cross sectional width of each
lateral strip increases outwardly from said bridging strip,
U-shaped rail means of rigid material having inwardly inclined legs
and a land interconnecting said inwardly inclined legs, said
lateral sealing strips being pressed with their wedge shaped
contour into the space between said inwardly inclined legs, groove
means in each of said structural members each of said groove means
having an open face facing said gap, a respective box section
secured in each of said groove means, each box section having inner
side walls and molding means of angular section located along said
inner side walls, said inwardly inclined legs having outwardly
facing surfaces fitting against a respective one of said molding
means.
2. The sealing device according to claim 1, further comprising a
cross piece between each lateral strip and the bridging strip, said
cross pieces extending to fit flush against the adjacent wall of
said structural members on both sides of said bridging strip when
said lateral strips are pressed into said groove means.
3. An elastic sealing device for sealing a gap between adjacent
structural members comprising first and second lateral sealing
strips, a bridging strip with longitudinal folds therein and
interconnecting said lateral sealing strips, each of said lateral
strips including a wedge shaped contour whereby the cross sectional
width of each lateral strip increases outwardly from said bridging
strip, and U-shaped rail means of rigid material having inwardly
inclined legs as well as a land interconnecting said inwardly
inclined legs, said lateral sealing strips being pressed with their
wedge shaped contour into the space between said inwardly inclined
legs of said rail means to form a structural unit, said sealing
device further comprising two cross pieces one of which is arranged
between each lateral strip and each end of said bridging strip,
each cross piece having two legs one on each side of the bridging
strip, said legs adjacent to the same lateral strip forming an
acute angle prior to installation whereby the acute angles of the
two cross pieces point toward each other.
4. The elastic sealing device according to claim 3, wherein said
land interconnecting said inwardly inclined legs of said rail means
have lateral edges which extend beyond said inclined legs.
Description
BACKGROUND OF THE INVENTION
The present invention relates to elastic gap sealing devices or
sections for sealing gaps between adjacent structural members,
especially in buildings made of pre-fabricated concrete
components.
Prior art sealing devices of the avove type with lateral sealing
strips interconnected by a longitudinal bridging strip including
folds extending in parallel to the length of the gap, are adapted
for insertion into rails embedded into the walls defining the gap
subsequent to such embedding. In other words, the rails are
embedded into the lateral walls of the concrete building components
during the fabrication of these components. These embedded rails
are made of polyvinyl chloride sections and make it rather
difficult to insert the sealing strips due to the relatively large
surface contacts between the lateral strip portions of the elastic
sealing strip sections and the rail sections. Thus, heretofore, it
was necessary to provide for relatively large tolerances in order
to accomplish the insertion, whereby it was not possible to avoid
leaks altogether.
Another disadvantage of prior art sealing devices is seen in that
it is virtually impossible to replace the sealing strips after the
sections thereof have been destroyed due to any mechanical or
chemical wear and tear. In any event, if repair is possible, it can
e done only under substantial difficulties.
OBJECTS OF THE INVENTION
In view of the foregoing it is the aim of the invention to
accomplish the following objects singly or in combination:
To avoid the above outlined drawbacks of the prior art, more
specifically, to facilitate the installation while maintaining
tolerances between cooperating elements in the sealing device which
tolerances will assure a reliable sealing even over prolonged
periods of time;
To facilitate the repair or replacement of worn out sealing
strips;
To provide a sealing device which is simple in its structure and
accordingly, inexpensive to manufacture;
To provide a sealing device with deflecting means therein for
guiding any seepage in a desired direction and thereby preventing
the seepage from penetrating the sealing device; and
To provide a sealing device wherein the lateral sealing strips are
inserted into U-shaped rails even prior to the installation of the
sealing device in a gap.
SUMMARY OF THE INVENTION
According to the invention there is provided an elastic sealing
device including lateral sealing strips interconnected by a
bridging strip having folds therein extending longitudinally
relative to the length of the gap to be sealed wherein the lateral
sealing strips have cross sections of a width which increases from
said bridging strip outwardly, said lateral strips being clamped in
U-shaped rails wherein the lateral strips have wedge shaped outer
contours which are pressed into the space between legs of the
U-shaped rails which legs are inwardly inclined toward each other
and which rails are made of rigid materials, wherein the outer
surfaces of said rail legs rest on moldings of correspondingly
angular shape to complement said wedge shaped contour, and wherein
the moldings form part of a box section inserted or embedded in a
respective groove in the wall forming said gap.
The structure of a sealing device as taught by the present
invention facilitates the installation of the elastic sealing
device due to the rails which are pressed onto the lateral sealing
strips because these rails, which for example, may be made of steel
or aluminum have a low friction coefficient and thus are capable of
smoothly gliding along the moldings of the box sections which
moldings are made, for example, of hard polyvinyl chloride.
BRIEF FIGURE DESCRIPTION
In order that the invention may be clearly understood, it wll now
be described by way of example, with reference to the accompanying
drawings, wherein:
FIG. 1 is a sectional view through the present sealing device in
its condition installed in a gap between two structural concrete
components; and
FIG. 2 is a sectional view through a sealing device according to
the invention prior to its installation.
DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS
Referring to FIG. 1, there are shown structural concrete components
1 and 2 having respective end walls 4 and 5 which define a gap 3
between these concrete components 1 and 2.
In each end wall 4 and 5 there is provided a groove in which is
embedded a box section 6 and 7 respectively. These box sections may
be made of high quality rust proof steel, aluminum or preferably of
hard polyvinyl chloride or any other material suitable for the
purpose. The box sections 6 and 7 are provided with moldings 8
having a pointed cross section which points inwardly relative to
the respective box. These moldings are arranged opposite each other
in order to receive therebetween a U-sectional rail 9, preferably
made of aluminum which is provided with legs 10 inclined inwardly
or rather toward each other to provide a wedge shaped space between
these legs of the rails 9.
The sealing device 12 comprises two lateral sealing strips 11
interconnected by a bridging strip 13. The elastic sealing device
12 may be made, for example, of rubber or any suitable elastomeric
material. The bridging portion 13 includes folds extending
longitudinally of the gap 3. The lateral sealing strips have a
wedge shaped cross section whereby the sealing strip portion
adjacent to the intermediate or bridging strip 13 has a narrower
width than the outward portion of the lateral strips whereby said
width is measured in a direction perpendicularly to the length of
the lateral sealing strips 11. These sealing strips 11 are pressed
into the space between the legs 10 of the U-shaped rails 9.
In order to completely cover the groove opening in the end walls 4
and 5, the sealing device is provided with cross pieces 14 arranged
between the lateral strips 11 and the bridging strip 13. Each cross
piece 14 has two legs, one on each side of the bridging strip 13.
The total length of the two legs of a cross piece adjacent to a
groove is longer than the width of the groove in order to properly
cover the adjacent groove. In this connection reference is made to
FIG. 2 wherein the sealing device is shown prior to its
installation in a gap. It will be noted that the legs of the cross
pieces 14 are inclined relative to each other so as to include
preferably an acute angle in such a manner that the inclined cross
pieces point toward each other prior to installation. This feature
of the invention has the advantage that subsequent to the
installation the legs of the cross pieces will snugly press against
the end walls of the structural members under a biasing force which
is inherent in the elastic material of which the lateral strips 11
and the cross pieces 14 are made. This biasing force is sufficient
to assure a good seal even under conditions where the gap width
increases extremely.
In addition to the just described snug and flush contact between
the inner surfaces of the cross pieces 14 under the biasing
pressure, the present invention provides a further sealing feature
between the lateral strips 11 and the U-shaped rails 9 because the
inwardly inclined legs 10 of these rails 9 guide any seepage in a
draining direction, preferably downwardly. This effect may even be
enhanced by providing the rails 9 with extension edges 16 which
protrude outside the land interconnecting the inwardly inclined
legs 10 of the rails 9. This embodiment is illustrated in the right
hand portion of FIG. 2. These extension edges 16 completely prevent
that any seepage may wnader around the sealing device from one side
thereof to the other side.
The installation of the sealing device 12 is accomplished in that
first the U-shaped rails 9, for example, made of aluminum are
pressed onto the lateral edges 11 to form an integral structure as
shown in FIG. 2. The lateral sealing strips 11 with the rails 9
atached thereto are then pressed into the respective groove. In
this connection it should be noted that the outer width of the
rails 9 are such as to fit into the grooves whereas the spacing
between the outer tips of the legs of the cross pieces 14 is larger
than the width of the groove so that these tips will touch the side
walls 4, 5 of the structural members whereby the cross pieces 14
are sraightened out as the respective legs glide along the side
walls. The legs 10 rest snugly in a sealing manner against the
moldings 8 of the box sections 6 and 7. Incidentally, these box
sections may be firmly secured to the structural components 1 and 2
by means of anchor edges 15 as seen in FIG. 1. The just described
installation actually involves snapping the lateral sealing strips
11 with the rails attached thereto into the grooves whereby the
snap action is much like that of a snap button. This is a
substantial advance in the art accomplished by the present
invention.
Although the invention has been described with reference to
specific example embodiments, it is intended to cover all
modifications and equivalents within the scope of the appended
claims.
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