|Publication number||US3778020 A|
|Publication date||Dec 11, 1973|
|Filing date||Mar 9, 1972|
|Priority date||Mar 9, 1972|
|Publication number||US 3778020 A, US 3778020A, US-A-3778020, US3778020 A, US3778020A|
|Inventors||Burrows C, Vajda E|
|Original Assignee||Burrows C, Vajda E|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Referenced by (33), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
nited States Patent 11 1 urrows et al.
FOUNDATION STRIP FOR CONCRETE MOLDING Inventors: Charles B. Burrows, 1142 E. Ruth,
Phoenix, Ariz. 85020; Edward A. Vajda, 8551 E. Thornwood Dr., Scottsdale, Ariz.
Filed: Mar. 9, 1972 Appl. No.: 233,207
us. (:1. 249/219 R, 249/34 Int. Cl. E04g 17/06 Field of Search 249/33, 34, 219 R References Cited UNITED STATES PATENTS 8/1929 Pontiere 249/219 R 3/1970 Jester 249/176 6/1945 Hyre 249/219 R 3/1961 Brow Jr. et al. 249/219 R 1 111 3,778,020 Dec. 11, 1973 3,697,039 10/1972 Phelps 249/219 2,490,228 12/1949 Pontiere ..249/34X FOREIGN PATENTS OR APPLICATIONS Canada 249/217 Primary Examiner-J. Spencer Overholser Assistant Examiner-B. D. Tobor Attorney-Eric P. Schellin et al.
 ABSTRACT This specification discloses a foundation strip that is used to locate two vertical mold panels in spaced relation on a base and maintain the panels in these positions during the molding of a concrete wall. The strip is an integral one-piece member of plastic and is structurally designed to incorporate the necessary properties of strength and rigidity into the strip when made of plastic, as compared to metal.
2 Claims, 5 Drawing Figures FOUNDATION STRIP FOR CONCRETE MOLDING The present invention relates to foundation strips used to locate mold panels for the molding of concrete walls and is concerned primarily with such a strip that is made of plastic and all the elements of which are integrally joined.
BACKGROUND OF THE INVENTION At the present time, the use of devices for locating the lower edges of mold panels on a base in properly spaced relation and to hold such strips in this position during the molding of concrete is widespread and is in fact a necessary incident to the molding of concrete walls.
Known devices for this purpose are of metal and are of two general classes. In one of these classes, the tie or spacing device is of wire, and in the other class, they consist essentially of metallic strips or bands. Examples of the latter class are U.S. Pats. Nos. 1,437,323, 2,378,850 and 2,973,567. These patents all have one feature in common in addition to that of being made of metal. Thus, a band is provided which lies flat on a concrete base and has an upturnedflange at each end. Spaced inwardly from each end flange a distance equal to the thickness of a mold element is an upstanding inner flange or tang. These known devices, being made of metal, have the structural properties required of a I device of this type. However, metal is quite expensive and the devices are not subject to re-use because they are left in position after the concrete wall is formed.
The present invention is founded on the basic concept of making a foundation strip for concrete molding of plastic and to incorporate into the structural design of the strip features which impart the necessary strength and rigidity thereto.
OBJECTS OF THE INVENTION With the foregoing conditions in mind, the present invention has in view the following objectives:
1. To provide a foundation strip for concrete molding which is of plastic and all the elements of which are integrally connected.
2. To provide a foundation strip of the type, noted having end edges and outer flanges upstanding from said strip with each flange being spaced inwardly of the end edge and reinforced by a web in the space between the flange and the end edge.
3. To provide, in a foundation strip of the characte aforesaid, inner flanges which upstand from the outer flanges a distance corresponding to the thickness of a mold panel which is to be received between each pair of flanges.
4. To provide, in a foundation strip of the kind described, reinforcing webs for the inner flanges.
Various other more detailed objects and advantages of the invention such as arise in connection with carrying out the above ideas in a practical embodiment will, in part, become apparent and, in part, be hereafter stated as the description of the invention proceeds.
SUMMARY OF THE INVENTION The foregoing objects are achieved by providing a plastic strip that is intended to lie flat on a concrete base and be secured in position thereon. This strip has end edges. Spaced inwardly from each end edge and upstanding from the strip to which it is integrally joined is an outer flange. A supporting web is integrally joined to the strip outside of each flange and to the outer face of that flange. An inner flange upstands. inwardly in spaced relation to each outer flange and it is integrally joined to the strip. The flanges of each set of inner and outer flanges are spaced apart a distance to snugly accommodate a mold panel. A reinforcing web is inte grally joined to the inner face of each inner flange and the strip.
For a full and more complete understanding of the invention, reference may be had to the following description and the accompanying drawing wherein:
FIG. 1 is a perspective of a foundation strip for concrete molding embodying the precepts of this invention and illustrating the invention in its simpliest form;
FIG. 2 is another perspective of a modification in which the inner flanges are reinforced;
FIG. 3 is a view in side elevation of the strip of FIG.
FIG. 4 is a top plan view of the strip of FIGS. 2 and 3, and
FIG. 5 is a perspective illustrating how the strip positions a pair of mold panels on a concrete base.
Referring now to the drawing, wherein like reference characters denote corresponding parts, and first more particularly to FIG. 5, a concrete base is designated 10. An outer mold panel 11 and an inner mold panel 12 are positioned on the upper face of base 10 by a foundation strip of this invention which is indicated generally at 13.
Referring now to FIGS. 2, 3 and 4, it is important to note that the strip 13 is of plastic, and may be of any of the several now widely known plastics having the properties required of the subject strip and which are susceptible to being molding into the configuration illustrated. Strip 13 comprises a main body portion 14 of elongate, rectangular shape presenting end edges 15 and side edges 16. The main body portion 14 is formed with an aperture 17 which is preferably located centrally of both the side and end edges and which accommodates a nail 18 that is used in securing the strip 13 inposition on base 10 by being driven therethrough in a well-known manner.
Spaced inwardly from each end edge 15 is a flange 19 that is integral with the main body portion 14. Standing alone in an unsupported position, flanges 19 would not be sufficiently strong and rigid to perform the holding and supporting functions required of them. To provide .such support, a web 20 of triangular shape is integrally joined to main body portion 14 at its lower edge and to the outer face of each flange 19 at its inner edge. The webs 20 are located substantially midway the side edges 16.
An inner flange 21 is associated with each outer flange 19 and is spaced therefrom a distance equal to the thickness of mold panels 11 and 12. Each flange 21 that the webs which support the inner flanges 21 are omitted.
While preferred specific embodiments are herein disclosed, it is to be clearly understood that the invention is not to be limited to the exact constructions, mechanisms and designs illustrated and described, because various modifications of these details may be provided in putting the invention into practice.
What is claimed is:
l. In a foundation strip for locating and holding in position a pair of spaced mold panels on a base for the molding of a concrete wall, said strip being of plastic:
a. a main body portion of elongate, rectangular shape presenting end and side edges;
b. said main body portion being formed with an aperture between said end edges, said aperture being adapted to receive a nail which secures the strip in position on said base;
0. a pair of outer flanges, each of which is integral with the said main body portion and which upstands therefrom at a distance spaced from an end edge;
d. a supporting member in the form of a triangularly shaped web for each of said outer flanges, each supporting member being located midway the side edges of said main body portion and having one edge integral with the flange which it supports, and another edge integral with the main body portion between the flange which it supports and the adjacent end edge of the main body portion, and
. a pair of inner flanges each of which is spaced from an outer flange a distance equal to the thickness of one of said mold panels and integral with said main body portion.
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|U.S. Classification||249/219.1, 249/34|
|International Classification||E04G17/12, E04G17/06|