U.S. patent number 3,740,909 [Application Number 05/118,852] was granted by the patent office on 1973-06-26 for preformed building panel with weather-proof seal.
This patent grant is currently assigned to Du Pont of Canada, Limited. Invention is credited to Mathias Ludwig Stinnes.
United States Patent |
3,740,909 |
Stinnes |
June 26, 1973 |
**Please see images for:
( Certificate of Correction ) ** |
PREFORMED BUILDING PANEL WITH WEATHER-PROOF SEAL
Abstract
A wall panel having front and rear surfaces and horizontal and
vertical side surfaces which are adapted to mate with side surfaces
of similar panels is provided. Each of the mating side surfaces
contains an element of a groove and ridge joint extending
throughout the side surface. The groove element of the joint is
recessed beyond the extremity of the ridge element so that, when
the panel is mated with a similar panel, the ridge and groove
elements cooperate to form a cavity which acts as a capillary break
and is connected to the front surface of the panel to permit
drainage of any water that accumulates between the panels. A
rectangular shaped preformed panel with a rigid foamed plastic
core, an exterior face comprising staggered rows of brick veneer
bonded to the core and an interior rigid backing is disclosed.
Inventors: |
Stinnes; Mathias Ludwig
(Toronto, Ontario, CA) |
Assignee: |
Du Pont of Canada, Limited
(Montreal, Quebec, CA)
|
Family
ID: |
22381125 |
Appl.
No.: |
05/118,852 |
Filed: |
February 25, 1971 |
Current U.S.
Class: |
52/302.1;
52/309.9; 52/315; 52/592.5 |
Current CPC
Class: |
E04C
2/205 (20130101); E04B 1/70 (20130101); E04B
2/08 (20130101); E04B 2002/0204 (20130101); E04B
2002/0206 (20130101) |
Current International
Class: |
E04B
2/04 (20060101); E04C 2/10 (20060101); E04C
2/20 (20060101); E04B 1/70 (20060101); E04B
2/08 (20060101); E04B 2/02 (20060101); E04c
002/20 (); E04b 001/70 () |
Field of
Search: |
;62/302,303,97,304,305,593,594,595,198,504,505,589,591,592,539 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Murtagh; John E.
Claims
What is claimed is:
1. In a rectangular shaped preformed wall panel having a rigid
foamed plastic core with an exterior face comprising staggered rows
of brick veneer bonded to the core, an interior rigid backing, and
horizontal and vertical side surfaces adapted to mate with the
horizontal and vertical side surfaces of similar wall panels to
form a joint, the improvement wherein each of said side surfaces
contains an element of a ridge and groove joint, said element
extending throughout the length of said side surface, any groove
element being recessed beyond the extremities of the ridge element
with which it is to be mated so that, when said wall panel is mated
with adjacent wall panels, horizontal and vertical cavities are
formed, each cavity being connected to the front and rear surfaces
of said wall panel by the cracks which form the remainder of the
joints and acting as a capillary break to accumulate any liquid
introduced into said joints, each upper horizontal cavity being
further connected to the bottom side surface of said panel through
said vertical cavities to permit drainage of any liquid
accumulating in the joints between said wall panel and an adjacent
wall panel.
2. The wall panel of claim 1 wherein a portion of said horizontal
side surfaces slopes towards the face of said wall panel.
3. The wall panel of claim 1 wherein the element of said ridge and
groove joint on the horizontal side surfaces comprises a stepped
shoulder adjacent to said rigid backing; a sloping portion adjacent
to said face and a horizontal portion extending from the stepped
shoulder to the sloping portion.
4. The wall panel of claim 3 wherein the vertical side surfaces
have vertical and horizontal segments conforming to the staggered
rows of brick veneer on the exterior face.
5. The wall panel of claim 1 wherein the depth of the groove
recessed from the extremity of the ridge to the bottom of the
groove is at least 1/8 inch.
6. The wall panel of claim 1 wherein the interior rigid backing
extends beyond the upper horizontal surface of said wall panel to
form a nailing strip.
Description
BACKGROUND OF THE INVENTION
This invention relates in general to preformed or prefabricated
building panels and more particularly to building panels having
special means to fasten one to the other to form a weather-proof
seal.
Preformed and prefabricated building panels of various descriptions
and manufactured of various materials have been known and utilized
in the construction of buildings for some time. The majority of
these panels have good heat and sound insulation properties. The
use of foamed plastic as an insulating layer or as an element or
laminate in wall structures with an exterior surface of brick,
stone or marble is well known. One such type of panel has a layer
of rigid foamed plastic, preferably polyurethane, to one face of
which is bonded durable facing materials such as that illustrated
by U.S. Pat. application Ser. No. 664,752 filed on Aug. 31, 1967
and U.S. Pat. application Ser. No. 031,056 filed on Apr. 6, 1971,
both by K.W. Pope. Such a panel can be used as a load-bearing or
non-load-bearing wall panel. It can be fabricated in a factory,
transported to and erected on a building site. The panels may be
fabricated in sizes suitable for combining with similar panels into
a wall, for mounting as individual independent units upon wall
framing, and for exterior or interior use.
A problem which has for many years plagued the application of
building panels in the construction of buildings occurs at the
joint between the panels. One common form of joint between panels
comprises the flat side of one panel mating with the flat side of
an adjacent panel. There may be an adhesive or a caulking compound
used in the joint, but in external walls where the range of
temperature encountered may exceed 100.degree. F., expansion and
contraction takes place leading to cracks which may occur at one or
more of the joints. Wind and rain may cause water to penetrate
these cracks, and capillary action may occur which draws the water
from the external surface of the panel to the inner surface. If
freezing subsequently occurs, the crack in the joint expands,
tending to further damage the joint.
Another problem that exists in the common form of joint having flat
mating side surfaces, is the problem of alignment. To ensure that
the exterior surfaces of the panels are in line, reasonable skill
in assembly is required on the part of the builder.
The use of a cavity in traditional joints in building walls to stop
the capillary action of water is disclosed by G. K. Garden in the
Canadian Building Digest, CBD 97 published January, 1968.
It is an object of the present invention to provide a novel joint
between preformed building panels to stop water passing from one
side of the panel to the other. It is a further object to provide a
joint which positively aligns the building panels. A still further
object of the present invention is to provide building panels which
may be assembled with unskilled labor.
SUMMARY OF THE INVENTION
With these and other objects in mind, there is provided a wall
panel having front and rear surfaces and horizontal and vertical
side surfaces, at least two of the side surfaces being adapted to
mate with the horizontal and vertical side surfaces of similar wall
panels. Each of the mating side surfaces contains an element of a
ridge and groove joint extending throughout the length of the side
surfaces and any groove element contained in the side surfaces
being recessed beyond the extremities of the ridge element with
which it is to be mated so that, when the wall panel is mated with
a similar wall panel, the groove element and the ridge element
cooperate to form a cavity, said cavity being connected to the
front surface of the panel to permit drainage of any liquid
accumulating between adjacent wall panels.
BRIEF DESCRIPTION OF THE DRAWINGS
In drawings which illustrate the embodiments of the invention,
FIG. 1 is a perspective view of one type of building panel showing
the mating surfaces of the sides of the panel which form one
embodiment of the present invention.
FIG. 2 is an elevational view showing a wall formed from several of
the panels of FIG. 1 and the joints between the panels.
FIG. 3 is a cross-sectional view taken at the line 3,3 in FIG. 2
and represents a horizontal joint between two panels.
FIG. 4 is a cross-sectional view taken at the line 4,4 in FIG. 2
and represents a vertical joint.
FIG. 5 is a perspective view of another type of building panel
showing the arrangement of the mating surfaces of the sides which
form another embodiment of the present invention.
FIG. 6 is an elevational view showing a wall formed from several of
the panels of FIG. 5 and the joints between the panels.
FIG. 7 is a cross-sectional view taken at the line 7,7 in FIG. 6
showing the horizontal joint.
FIG. 8 is a cross-sectional view taken at the line 8,8 in FIG. 6
showing the horizontal section of the vertical joint.
FIG. 9 is a cross-sectional view taken at the line 9,9 in FIG. 6
showing the vertical section of the vertical joint.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring now to the drawings, the panel shown in FIG. 1 has an
exterior durable front surface or face 10, vertical side 11 and top
side 12. Several such panels can be combined to form a wall such as
that illustrated in FIG. 2. In the combination, as shown in
cross-section in FIG. 3, the surface of the top side 12 of the
center panel 13 of FIG. 2 mates with the surface of the bottom side
14 of the upper panel 15 of FIG. 2 to form a horizontal joint. The
top side 12 has a surface 16 sloping towards the exterior face 10
of the panel 13, and a stepped shoulder 17 adjacent to the interior
face 18 of the panel 13. A horizontal surface 19 extends from the
shoulder 17 to the sloping surface 16. The profile of the surface
of the bottom side 14 of the upper panel 15 mates with the surface
of the top side 12 of the center panel 13, leaving a cavity 20
between the horizontal surface 19 on the center panel 13 and a
horizontal surface 21 on the upper panel 15. Both of these
surfaces, therefore, contain the elements of a joint which can be
classified broadly as a ridge and groove joint. In this instance,
the top surface is the ridge and the bottom surface is the
groove.
A gap 22 remains between the surfaces of the sides of the center
panel 13 and the upper panel 15. This gap varies as the panels
expand and contract due to temperature changes. Water on the
exterior face 10 may work up the gap 22 by capillary action or may
be forced up by wind. However, when the water reaches the cavity
20, capillary action ceases and any water that collects in the
cavity 20 drains at each end of the panel through the vertical
joints to the exterior face 10.
A cross-section through a vertical joint is illustrated in FIG. 4.
A ridge 23 on the surface of one side of a panel mates with a
groove 24 on the surface of one side of an adjacent panel. The
ridge 23 may have tapered sides or may have a rounded top surface
to aid in assembling the panels. A cavity 25 is formed between the
ridge 23 and the bottom of the groove 24. As may be seen in FIG. 1
the groove 24 is sloped such that it runs from the back of the
shoulder 17 of the horizontal joint at the surface of the top side
12 of the panel to the sloping surface of the bottom side 14 of the
panel. Although the groove 24 is shown sloped in the drawing, it
may be vertical provided the lower end of the groove 24 ends on the
sloping surface of the bottom side 14 of the panel. Provision is
made in the panel for water which collects in the cavity 20 in the
horizontal joint to drain into the cavity 25 in the vertical joint.
Any water in the cavity 25 flows down to the sloping surface 16 and
drains through the gap 22 to the exterior face 10 of the panel.
The construction of the panels may be from any one of a number of
construction materials, such as concrete, masonry, synthetic
materials, etc. Alternatively, the panels may be constructed from a
foamed plastic material such as polystyrene or polyurethane with a
hard-wearing exterior face.
In the embodiment illustrated in FIG. 5, the panel 26 comprises a
rigid foamed plastic core 27 of polyurethane with an exterior face
consisting of staggered rows 28 of brick veneer bonded to the
foamed core 27. A rigid backing 29 such as plywood, fiberboard,
hard plastic, clipboard, etc. is located on the inside of the
foamed plastic core 27. The vertical joint in each panel has
vertical and horizontal segments to match the staggered rows 28 of
brick veneer. In FIG. 6 the main horizontal joint 30 is shown
formed between the upper panel 31 and lower panel 32. A
cross-section through this horizontal joint 30 is illustrated in
FIG. 7. The rigid backing 29 on the lower panel 32 extends
approximately 1/2 to 3 inches above the horizontal joint to provide
a nailing strip 33 for the panel. The panels may be fastened to the
building frame by mechanical fasteners or adhesive with this
nailing strip 33. To form the horizontal joint the surface of the
top side of each panel is formed in the manufacturing process to
contain a stepped shoulder 34 with a short horizontal surface 35 in
the plastic core 36, followed by a sloping surface 37 which slopes
towards the exterior face 38. The surface of the bottom side of the
upper panel 31 has a boss 39 which slides between the shoulder 34
and the rigid backing 33 on the lower panel 32 when the two panels
are assembled to provide a positive location. The surface of the
bottom side of the upper panel 31 has a horizontal surface 40 and a
sloping surface 41 in the plastic core 36 which corresponds to the
horizontal surface 35 and sloping surface 37 in the lower panel 32
but which is designed to leave a cavity 42, preferably 1/8 inch or
more in depth, to act as a capillary stop. The cavity 42 becomes
smaller as the upper sloping surface 41 and the lower sloping
surface 37 taper to approximately 1/32 inch at the exterior face
38. A caulking or gasket material may be used between the nailing
strip 33 of the lower panel 32 and the foamed core 36 of the upper
panel 31 to act as a wind seal. This may also be accomplished by
the use of building paper. Any water which forces its way into the
cavity 42 drains to the exterior face 38 of the panels down the
upper sloping surface 37 of the lower panel 32 or drains at each
end of the panel through the vertical joints to the exterior face
38.
The surfaces of the vertical sides of the panel as may be seen in
FIG. 5 and FIG. 6 have both vertical and horizontal segments. FIG.
8 illustrates a cross-section through a horizontal segment of a
joint between the center panel 32 and the panel 43 adjacent and on
the left of panel 32. The surfaces of the horizontal segment of
both panels slope towards the exterior face 38. A cavity 44 is
formed between the mating surfaces of panel 32 and the panel 43.
The cavity 44 is preferably 1/8 inch or more in width to ensure
capillary action does not occur from the exterior face 38 through
the plastic core 36 to the rigid backing 29. This joint prevents
water ingress and acts as a drain for water from other cavities in
the joints between panels.
A cross-section through the vertical segment of the vertical joint
shown in FIG. 9, is formed between the central panel 32 and the
left hand panel 43. The joint consists of a groove 45 cut in the
surface of the vertical segment of the plastic core 36 of the
central panel 32. This groove 45 runs from the top to the bottom of
the surface of the vertical segment which represents the height of
one of the rows of brick veneer, and from the rigid backing 29 to
the exterior face 38. Into this groove 45 fits a ridge 46 located
in the surface of the vertical segment of the plastic core 36 of
the left hand panel 43. The ridge 46 does not extend as high as the
depth of the groove 45, thus a cavity 47 forms between the ridge 46
and the groove 45 which is preferably 1/8 inch or more in depth.
The slope of the groove 45 in the outer vertical segment and the
ridge 46 in the inner vertical segment of the vertical joint is
shown in FIG. 5. The cavity 47 in the vertical segment of the joint
acts as a drain for any water that may rest in the cavity 44 in the
horizontal segment of the joint. The edge of the rigid backing 29
has one vertical joint without any horizontal segments located
midway between the inner and outer vertical segments of the
vertical joint between the two panels.
In assembling the panels shown in FIGS. 5 to 9, a panel is first
located against the building frame and nailed or fastened by means
of the nailing strip 33 to the frame. The second panel is then
mated to the first panel. If the mate is a side by side one, then
the ridges and grooves in the inner and outer vertical segments
ensure a positive location and align the two panels one with the
other. It has been found that the use of a standard grease or wax
on the mating surfaces aids in the ease of assembling the panels,
and also improves the seal of the joints between the panels. The
assembly of one panel on top of another is similar to the side by
side assembly. The boss 39 in the upper panel, slides into the slot
provided in the lower panel between the nailing strip backing 33
and the shoulder 34 thereby aligning the upper panel with the lower
panel. Once a panel has been located in the wall, it may be nailed
or fastened to the frame on two sides by the nailing strips 33 on
the rigid backing 29.
Manufacture of panels containing sides suitable for this joint
configuration can be achieved by any of a number of processes which
include but are not limited to: injection moulding, forming and
casting of a variety of materials, especially plastic as well as
some more traditional methods utilizing mechanical work such as
cutting and shaping.
Weathering tests conducted on building panels of the type shown in
FIGS. 5 to 9 utilizing this joint configuration have produced very
satisfactory results. Prolonged exposure to sun, rain, wind and
extremes in temperature, including freezing and thawing, have not
produced joint failure between panels. Furthermore, minor damage to
the mating surfaces of the panels have not affected assembly of the
panels or their service ability, nor do small dimensional changes
in the panels themselves. Positive alignment of panels is insured
even when unskilled labor is used for installation. The outside
work consists solely of mating the panels together and fastening
the nailing strip 33 to the substrate or building frame. This may
be achieved by using automatic tools and unskilled labor. Because
of the simplicity of the joint and the fastening system, panels
utilizing this joint configuration may be installed under adverse
weather conditions and extremes of temperature without a loss of
joining efficiency.
* * * * *