U.S. patent application number 09/777053 was filed with the patent office on 2002-08-08 for window and door form for prefabricated concrete walls.
Invention is credited to Sanger, Wallace D..
Application Number | 20020104952 09/777053 |
Document ID | / |
Family ID | 25109149 |
Filed Date | 2002-08-08 |
United States Patent
Application |
20020104952 |
Kind Code |
A1 |
Sanger, Wallace D. |
August 8, 2002 |
Window and door form for prefabricated concrete walls
Abstract
A wall and port form for forming a concrete wall having a port
for mounting a window or a door includes a building wall form
having a wall form perimeter wall and a wall form bottom wall; a
portal form for placement within the building wall form perimeter
wall for defining an opening for one of a door and a window, the
portal including a portal form perimeter wall configured as a
closed loop encompassing a port space and preventing concrete
poured into the wall form from flowing into the port space
encompassed by the portal form, and a form elevating and
dislodgement mechanism for elevating the portal form relative to
the building wall form upon curing of concrete within the wall form
and thereby freeing it from the grip of the concrete.
Inventors: |
Sanger, Wallace D.; (West
Palm Beach, FL) |
Correspondence
Address: |
FRANK L. KUBLER
13261 S.W. 54th Court
Miramar
FL
33027
US
|
Family ID: |
25109149 |
Appl. No.: |
09/777053 |
Filed: |
February 5, 2001 |
Current U.S.
Class: |
249/39 |
Current CPC
Class: |
B28B 7/186 20130101;
B28B 7/28 20130101; B28B 7/10 20130101 |
Class at
Publication: |
249/39 |
International
Class: |
E04G 015/02 |
Claims
I claim as my invention:
1. A wall and port form for forming a concrete wall having a port
for mounting a window or a door, comprising: a building wall form
having a wall form perimeter wall and a wall form bottom wall; a
portal form for placement within said building wall form perimeter
wall for defining an opening for one of a door and a window, said
portal comprising a portal form perimeter wall configured as a
closed loop encompassing a port space and preventing concrete
poured into said wall form from flowing into the port space
encompassed by said portal form, and form elevating and
dislodgement means for elevating said portal form relative to said
building wall form upon curing of concrete within said wall form
and thereby freeing it from the grip of the concrete.
2. The wall and port form of claim 1, wherein said portal form has
interior corners and wherein said form elevating and dislodgement
means comprises screw retaining plates extending across each
interior corner of said portal form perimeter wall, each said
retaining plate having an internally threaded screw bore and an
elevating screw engagingly screwed through each said screw bore,
and wherein each said elevating screw is of sufficient length that
rotating said screws a certain number of turns causes each said
screw to bear against said bottom wall and cause a resultant upward
force on said portal form, dislodging said portal form from cured
wall concrete in said wall form and elevating said portal form.
3. The wall and port form of claim 1, wherein said portal form
perimeter wall is one of substantially square and substantially
rectangular.
4. The wall and port form of claim 1, wherein said portal form
perimeter wall has a wall upper edge and a wall lower edge and has
a wall outer face which is tapered inwardly from said wall upper
edge to said wall lower edge for lower resistance dislodgement.
5. The wall and port form of claim 1, wherein said portal form
perimeter wall outer face is stepped to define window and door
mounting steps in the resulting port in the formed concrete
wall.
6. The wall and port form of claim 1, wherein said outer face of
said portal form perimeter wall is covered with an
adhesion-resistant coating prior to pouring concrete into said wall
form.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to the field of
building construction from prefabricated building elements, such as
prefabricated concrete building walls and modules. More
specifically the present invention relates to a portal form for
placement within the wall form perimeter wall of a building wall
form, to define an opening in the resulting concrete wall for
mounting a window or a door. The portal form includes a portal form
perimeter wall configured as a closed loop which is preferably
either square or rectangular and prevents concrete poured into the
wall form from flowing into the space encompassed by the portal
form, and includes form elevating and dislodgement screw structures
including elevating screws which are rotated after the wall
concrete cures, to elevate portal form and thereby free it from the
grip of the cured concrete. The portal form perimeter wall has a
wall upper edge and a wall lower edge and either the entire portal
form perimeter wall, or only its outer surface is tapered inwardly
from the wall upper edge to the wall lower edge for greater ease in
dislodging and removing the portal form from the cured wall
concrete. The portal form perimeter wall or its outer face is
preferably stepped to define window and door mounting in the
resulting door or window opening.
[0003] 2. Description of the Prior Art
[0004] There have long been forms for receiving uncured concrete to
create a pre-fabricated concrete wall. Interior forms have been
provided for forming windows and door openings. Yet interior forms
have either been very difficult to remove from the cured wall or
have necessarily remained as part of the cured wall.
[0005] It is thus an object of the present invention to provide a
window and door portal form for placement within a concrete wall
form for defining an opening in the cured concrete wall for
placement of a window or a door.
[0006] It is another object of the present invention to provide
such a portal form which includes means for progressively, evenly
and reliably dislodging the portal form from the cured concrete
wall.
[0007] It is still another object of the present invention to
provide such a portal form which can be used again and again.
[0008] It is finally an object of the present invention to provide
such a portal form which inexpensive to manufacture, durable,
removably with a common tool such as an air wrench by a workman of
ordinary skill.
SUMMARY OF THE INVENTION
[0009] The present invention accomplishes the above-stated
objectives, as well as others, as may be determined by a fair
reading and interpretation of the entire specification.
[0010] A wall and port form is provided for forming a concrete wall
having a port for mounting a window or a door, including a building
wall form having a wall form perimeter wall and a wall form bottom
wall; a portal form for placement within the building wall form
perimeter wall for defining an opening for one of a door and a
window, the portal including a portal form perimeter wall
configured as a closed loop encompassing a port space and
preventing concrete poured into the wall form from flowing into the
port space encompassed by the portal form, and a form elevating and
dislodgement mechanism for elevating the portal form relative to
the building wall form upon curing of concrete within the wall form
and thereby freeing it from the grip of the concrete.
[0011] The portal form preferably has interior corners and the form
elevating and dislodgement mechanism preferably includes screw
retaining plates extending across each interior corner of the
portal form perimeter wall, each retaining plate having an
internally threaded screw bore and an elevating screw engagingly
screwed through each screw bore, and each elevating screw
preferably is of sufficient length that rotating the screws a
certain number of turns causes each screw to bear against the
bottom wall and cause a resultant upward force on the portal form,
dislodging the portal form from cured wall concrete in the wall
form and elevating the portal form.
[0012] The portal form perimeter wall preferably is one of
substantially square and substantially rectangular. The portal form
perimeter wall has a wall upper edge and a wall lower edge and has
a wall outer face which is tapered inwardly from the wall upper
edge to the wall lower edge for lower resistance dislodgement. The
portal form perimeter wall outer face is stepped to define window
and door mounting steps in the resulting port in the formed
concrete wall. The outer face of the portal form perimeter wall is
covered with an adhesion-resistant coating prior to pouring
concrete into the wall form.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Various other objects, advantages, and features of the
invention will become apparent to those skilled in the art from the
following discussion taken in conjunction with the following
drawings, in which:
[0014] FIG. 1 is a perspective top view of the preferred portal
form.
[0015] FIG. 2 is a perspective bottom view of the portal form of
FIG. 1.
[0016] FIG. 3 is a cross-sectional side view of the portal form of
FIGS. 1 and 2.
[0017] FIG. 4 is a front perspective view of a wall form
incorporating a tilting table with a portal form shown in broken
lines.
[0018] FIG. 5 is a rear perspective view of the tilting table and
thus of the wall form of FIG. 4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0019] As required, detailed embodiments of the present invention
are disclosed herein; however, it is to be understood that the
disclosed embodiments are merely exemplary of the invention which
may be embodied in various forms. Therefore, specific structural
and functional details disclosed herein are not to be interpreted
as limiting, but merely as a basis for the claims and as a
representative basis for teaching one skilled in the art to
variously employ the present invention in virtually any
appropriately detailed structure.
[0020] Reference is now made to the drawings, wherein like
characteristics and features of the present invention shown in the
various FIGURES are designated by the same reference numerals.
[0021] First Preferred Embodiment
[0022] Referring to FIGS. 1-5, and specifically to FIGS. 4 and 5, a
portal form 10 is shown placed within a building wall form 100 on a
forming surface, the forming surface preferably being a tilting
table 50 elevated on hinges 62 from a horizontal frame 56 by
hydraulic cylinders 58. The building wall form 100 has a wall form
perimeter wall 120 and a wall form bottom wall 52 preferably
defined by the tilting table 50 upper surface. The portal form 10
within the building wall form 100 functions to define an opening in
the resulting cured wall for the mounting of a window or a
door.
[0023] Portal form 10 includes a portal form perimeter wall 20
configured as a closed loop which is preferably either square or
rectangular and prevents concrete poured into the wall form 100
from flowing into the port spaces encompassed by the portal form
10. See FIGS. 1-3. Portal form perimeter wall 20 is preferably
fitted around metal abutment blocks 54 welded to the wall form
bottom wall 52 and thus to tilting table 50 upper surface. See FIG.
4. Portal form 10 includes form elevating and dislodgement screw
structures 30 including elevating screws 32 which are rotated after
the wall concrete cures, to elevate portal form 10 and thereby free
it from the grip of the cured concrete.
[0024] The portal form perimeter wall 20 has a wall upper edge 22
and a wall lower edge 24 and either the entire portal form
perimeter wall 20 or only its outer surface is tapered inwardly
from the wall upper edge 22 to the wall lower edge 24 for greater
ease in dislodging and removing the portal form from the cured wall
concrete. The portal form perimeter wall 20 or its outer face is
preferably stepped to define window and door mounting step 26 in
the resulting door or window opening.
[0025] As indicated above, a key inventive feature of the portal
form 10 is the elevating and dislodgement screw structures 30 which
include screw retaining plates 34 which preferably extend across
each interior corner of the portal form perimeter wall 20. Each
retaining plate 34 has a screw bore 36 which is internally threaded
and an elevating screw 32 or bolt which is engagingly screwed
through the screw bore 36. The elevating screw 32 is of sufficient
length that rotating the elevating screw 32 a certain number of
turns causes the elevating screw 32 to bear against the bottom wall
52 of the wall form 100 and cause a resultant upward force on the
portal form 10 which dislodges the portal form 10 from the cured
wall concrete and elevates the portal form 10. The elevating screws
32 preferably have bolt heads of conventional configuration which
are rotated by a wrench, and preferably by an air wrench. It is
preferred that the outer face of the portal form perimeter wall 20
be covered with an adhesion-resistant coating before concrete is
poured into the wall form 100. It is also contemplated that the
portal form 10 be used in the very same way in a concrete building
module form 100. Structural cross-members 40 reinforce portal form
10.
[0026] While the invention has been described, disclosed,
illustrated and shown in various terms or certain embodiments or
modifications which it has assumed in practice, the scope of the
invention is not intended to be, nor should it be deemed to be,
limited thereby and such other modifications or embodiments as may
be suggested by the teachings herein are particularly reserved
especially as they fall within the breadth and scope of the claims
here appended.
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