1. Technology Field
The present invention generally relates to concrete form systems. In particular, the present invention relates to a grade bracket that is useful for setting and maintaining portions of a concrete form system at a desired grade level.
2. Related Technology
Concrete flatwork structures are routinely poured all over the world. Concrete flatwork—including concrete pads, sidewalks, driveways, roadways, etc.—provides a solid, secure surface for use or on which to build a home or other building. In the past, conventional concrete flatwork was often constructed by nailing dimensional wood products, such as 2×4 lumber, or other materials into a form with a desired shape on a ground surface, then pouring concrete into the volume created by the lumber.
After the concrete is cured, the lumber is separated from the concrete, often using a hammer. Unfortunately, this often results in cracking and splintering of the lumber, thus making it unusable for creating new flatwork forms. This not only wastes material, but can be a safety hazard because splintered wood can cause unintended injury to workers.
A related challenge involves the manner in which form components, such as the 2×4 lumber pieces, are supported when positioned to comprise a portion of the form. With any solution to the above challenges encountered with traditional lumber form components comes the related issue as to how such form components are to be supported at a desired grade above the ground surface in a manner that allows the form to precisely define the area to be covered by concrete.
In light of the above discussion, a need exists for a concrete system that eliminates the above-mentioned disadvantages and problems. In addition, a system for supporting form components that solve the above issues is also desired such that the form components can be accurately and easily positioned at a desired grade prior to pouring concrete into the resultant form.
The present invention has been developed in response to the above and other needs in the art. Briefly summarized, embodiments of the present invention are directed to a grade bracket for use with concrete form systems. In one embodiment, the grade bracket forms part of a concrete form system that includes a plurality of form components, including straight forms, curved radius forms, and skin panels for interconnecting form components. The form components are assembled atop a ground surface and are configured to define a volume for containing poured concrete.
Grade brackets for supporting the form components at a desired grade above the ground are used. Each grade bracket includes a body, a form support member, and a grade knob. The form support member attaches to the body and includes a bracket portion that supports the form component. The grade knob includes an eye-bolt. A stake secured in the ground is selectively engaged by the eye-bolt of the grade knob such that the grade bracket is maintained at a desired position on the stake.
In another embodiment, a grade bracket for supportably retaining a form component in a concrete form system is disclosed. The grade bracket here includes a body, a form support member, and an adjustable means for securing the body to a secured structure, such as a stake. The form support member is selectively extendable from the body, which is a hollow, four-sided, trapezoidal body. The form support member is configured to support the form component in a desired grade position. The adjustable means for securing the body to the stake can be a grade knob that is operably attached to the body. The grade knob includes a handle, an eye-bolt threadably engaged with the handle, and a washer interposed between the handle and a portion of the body. The eye-bolt is configured such that it frictionally engages the stake that passes therethrough, thereby securing the grade bracket in a desired position.
In yet another embodiment, a grade bracket for supporting a form component of a concrete form system is disclosed. The grade bracket comprises a body defining a top surface, a bottom surface, a first side surface, and a second side surface. At least one hole is defined in each of the top and bottom surfaces. The grade bracket further includes a form support member that includes a bracket portion configured to engage the form component. The body includes two tabs that slidably retain the form support member with respect to the body such that the bracket portion is selectively movable with respect to the body. The form support member also includes a hole defined therein. Finally, a grade knob is also included and comprises a handle that threadably engages with an eye-bolt. The eye-bolt can be aligned with the holes of the bracket portion and top and bottom body surfaces such that a stake can pass through the eye-bolt and the holes of the bracket portion and top and bottom surfaces. The grade knob selectively engages the stake such that the grade bracket is maintained at a desired position with respect to the stake and such that the form is maintained at a desired grade.
These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.
To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
Reference will now be made to figures wherein like structures will be provided with like reference designations. It is understood that the drawings are diagrammatic and schematic representations of exemplary embodiments of the invention, and are not limiting of the present invention nor are they necessarily drawn to scale.
The system 100 includes various form components, such as a plurality of straight forms of any suitable length, e.g., 102 (long) and 107 (short), which cooperate with other illustrated components on a surface, such as the ground, to define a space in which concrete or other suitable flowable product can be poured and maintained in a predetermined desired shape until hardened to the desired shape. In addition, radius form components 105 can also be included to assist in defining rounded perimeter portions of the predetermined desired space. Skin panels 106 are employed to bridge gaps between adjacent forms 102/105 when the gap is smaller than what can be filled by a standard sized form.
The various form components, i.e., forms/panels 102, 105, and 106, together bound a predetermined desired volume and define an inside surface 130 that forms the perimeter of the predetermined desired volume for the concrete or flowable material that is to be inserted therein. Mating of adjacent straight forms 102 is achieved via the use of interlocking end brackets 140 included at ends of each of the forms 102. A stake 170 is driven through a center cylinder defined by the interlocking end brackets 140 in order to secure the forms in place with respect to one another, as well as to maintain the system 100 in place on the surface on which the system 100 is placed.
The system 100 represents an improvement over known forming systems in that its forms and skin panels are formed of a durable material, such as metal, which allows their continued use without significant degradation. Also, various perimeter shapes are easily achieved by the present forming system. Further, the forming system shown in
Reference is now made to
Notwithstanding the discussion contained herein, the grade brackets of the present invention can be employed in forming systems that differ in various details from that shown and described herein. For instance, though the system shown in
Together with
The top portion 202A of the grade bracket body 202 includes one or more holes. In detail,
The grade bracket bottom portion 202B includes two tabs 214 that are sized and configured to slidably engage with the form support member 204 to enable the latter component to move relative to the body 202 in order to facilitate operation of the grade bracket 200. Also, a slit 216 is defined near the intersection of the bottom portion 202B and the second side portion 202D to enable passage of the form support member 204 through the second side portion 202D.
The form support member 204 includes a slide portion 220 and an L-shaped bracket portion 224 (
Movement of the form support member 204 in the above manner causes corresponding movement of the bracket portion 224 of the form support member with respect to the second side portion 202D. As mentioned, a portion of the bracket portion 224 can be selectively extended beyond the second side portion 202D via the slit 216. Selectable extension of the bracket portion 224 in this manner enables the “L” shape of the bracket portion 224 to engage and support a portion of a corresponding form component of the concrete forming system 100, including one of the straight forms 102, radius forms 105, or skin panels 106 along a bottom surface thereof, as shown in
Regardless of the amount of its extension, the form support member bracket portion 224 should be configured such that a form component that is supported by the bracket portion 224 is snugly held between the inner surface of the bracket portion 224 and the second side portion 202D of the body 202. This configuration ensures that the form component, such as the straight form 102, radius form 105, or skin panel 106, is properly supported at the desired level, or grade, above the ground surface and at the proper orientation. In other embodiments, it is possible to correspondingly slant the second side portion 202D and bracket portion 224 so as to support form components at an angle, if desired. Also, in one embodiment, the form support member 204 can be fixedly attached to the grade bracket body 202 such that a constant, non-changeable spacing is achieved between the bracket portion 224 and the second side portion 202D. This configuration could be employed where the forms 102105 to be supported are of equal thickness such that adjustment of the form support member 204 is unnecessary.
The grade knob 206 of the grade bracket 200 is employed to engage the stake 170 in order to maintain the grade bracket 200 at a desired level above the surface on which the system 100 is positioned, which in turn enables the grade bracket 200 to assist in maintaining forms/panels 102, 105, 106 of the system 100 at a desired grade. The grade knob 206 of the illustrated embodiment is a three-piece assembly that includes a handle 230 operably attached to an eye-bolt 232, and a washer 234. The grade knob 206 extends through the first side portion 202C of the body 202 such that the handle 230 and washer 234 are positioned on an exterior portion of the first side portion 202C. The eye-bolt 232 is threaded so as to threadably engage corresponding threads formed in the passage through the first side portion 202C. This enables the eye portion of the eye-bolt 232 to be selectively moved relative the first side portion 202C by rotating the handle 230. The washer 234 in one embodiment can be a compression washer to maintain adequate resistive force on the eye-bolt 232 to prevent undesired rotation of the grade knob 206 when engaged with the stake 170 and to prevent deformation of the first side portion 202C when the grade knob 206 is tightened. Also, the handle 230 can include one of a variety of configurations preferably suitable for hand use.
So configured, the grade knob 206 serves as one example of an adjustable means for securing the body 202 of the grade bracket 200 to a reference structure, such as the stake 170. However, it should be appreciated that various other configurations could serve as the means for securing. For instance, instead of a threaded bolt, a spring-biased bolt could be used. Or, instead of an eye-bolt 232, a bolt having a friction lever that can be selectively actuated to frictionally engage a portion of the stake 170 can be used. Further, the reference structure in the illustrated embodiment is a stake 170. However, in other embodiments, the reference structure can be another object, such as a wall adjoining the form perimeter. In such a case, the means for securing the body is adapted to engage the object in such a way as to secure the grade bracket 200 for use in maintaining the grade of the form component it supports.
In addition, the eye-bolt 232 is round, as shown in
Operation of the grade bracket 200 configured to the embodiment illustrated in
Sliding adjustment of the form support member 204 with respect to the grade bracket body 202 further includes aligning the bottom hole 212 of the body 202 with one of the holes 222A/222B of the form support member slide portion 220 such that the stake 170 can be received therethrough. The choice of which of the holes 222 is to be used is dependent upon the thickness of the form component to be supported: the hole 222A is aligned with the bottom body hole 212 when the form component to be supported is relatively thin, as shown in
In some cases, the choice of which of the holes 222A/B to align with the bottom hole 212 can also depend on the spacing of the body 202 with respect to the form/panel to be supported, and so adjusting the proximity of the body 202 orthogonally with respect to the form/panel surface can also be employed in properly aligning the various holes.
When one of the holes 222A/222B and the bottom hole 212 are aligned, alignment with one or both of the top holes 210A/210B is also achieved. Typically, alignment with the top hole 210A is preferred, as this hole allows for substantially vertical passage of the stake 170 through the grade bracket 200 before entry into the ground. However, slanted passage of the stake 170 through the second top hole 210B before passage through one of the holes 222A/B and bottom hole 212 is also possible, should circumstances warrant. Note that relative spacing of both the holes 210A and 210-B to one another and the holes 222A and 222B to one another can be varied in the manufacture of the grade bracket 200 so as to produce a desired spacing between the bracket portion 224 of the form support member 204 and the second side portion 202D of the body 202.
Once the bracket body 202 and form support member 204 are properly positioned such that the holes 212 and 222A or 222B are aligned, the eye-bolt 232 is moved as needed in order to align it with the above holes. The stake 170 is then passed through one of the top holes 210A/210B, the eye-bolt 232, and the aligned holes 212 and 220A/B before being securely driven into the ground or other surface.
This substantially restricts lateral and orthogonal movement of the grade bracket 200, while preserving selective vertical movement thereof. The grade bracket 200, with its form support member 204 being engaged with the corresponding form component, can then be selectively moved vertically up or down the stake 170 until the form/panel is positioned at the proper grade above the surface on which the system 100 is positioned.
While maintaining the grade bracket 200 at this level, the grade knob 206 is then rotated in order to tighten the engagement of the looped eye portion of the eye-bolt 232 with the portion of the stake 170 passing therethrough. Note again that in other embodiments, the eye-bolt 232 can be replaced by another mechanism by which stake engagement can be realized. Sufficient tightening of the grade knob 206 is achieved such that the grade bracket 200 is fixed in place on the stake 170. Of course, the previous fixation of the stake position in the ground is necessary for maintaining the form/panel at desired grade. Engagement of the eye-bolt 232 with the stake 170 also causes the form support member 204 to be secured in place such that the bracket portion 224 maintains the form component sandwiched between the bracket portion 224 and the second side portion 202D. The compression washer 234 in one embodiment can assist the maintenance of sufficient tension between the eye-bolt 232 and the stake 170.
Note that the present grade bracket 200 can also be employed in an “upside-down” configuration, wherein the grade bracket 200 is rotated 180 degrees, about an imaginary axis extending through the length of the grade knob 206, from the bracket orientation shown in
In a variation of the above upside-down configuration, the stake 170 can be alternatively driven in an angled direction through the hole 210B instead of through the hole 210A of the grade bracket 200 while in the upside-down position. Orientation of the stake 170 in this manner allows its entry into the ground at a point relatively farther away from the area to be poured with concrete, thereby avoiding any complications with disturbing the ground near the area to be poured.
To compensate for any reduced rigidity the elongated body 402 might cause, the grade bracket 400 includes cross braces 408 to strengthen the body 402 such that a form component, such as the straight form 102, is supported at grade without excessive bending of the grade bracket 400. Note that, though the grade brackets 400 shown in the accompanying drawings are made of metal, such as steel, other materials, including plastic and polymer compositions can also employed to form the grade brackets 400. As such, the cross braces 408 may be more or less needed, depending on the overall dimensions of the grade bracket 400 and the material from which it is composed.
Use of the grade bracket 400 is substantially the same as that described in connection with the previous embodiment. Note that other dimensions of the grade bracket 400 can be altered in size in order to accommodate a particular need or application. Thus, the embodiment of the present grade bracket 400 shown in
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative, not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
This application claims the benefit of U.S. Provisional Patent Application No. 60/710,440, filed Aug. 23, 2005, and entitled “Grade Bracket for Use in Concrete Form System,” which is incorporated herein by reference in its entirety.
Number | Name | Date | Kind |
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2572732 | Keklen et al. | Oct 1951 | A |
4846437 | Fitzgerald | Jul 1989 | A |
5076536 | Fitzgerald | Dec 1991 | A |
5096155 | Fitzgerald | Mar 1992 | A |
5156753 | Speidel | Oct 1992 | A |
5205942 | Fitzgerald | Apr 1993 | A |
Number | Date | Country | |
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20070045491 A1 | Mar 2007 | US |
Number | Date | Country | |
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60710440 | Aug 2005 | US |