Static structures (e.g. – buildings) – Insulating insert; e.g. – filler in cavity in preconstructed... – Stonelike type shell
Reexamination Certificate
2000-02-09
2001-05-22
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Insulating insert; e.g., filler in cavity in preconstructed...
Stonelike type shell
C052S344000, C052S318000, C052S667000, C052S745190
Reexamination Certificate
active
06233893
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to reinforcing core assemblies for forming barriers, especially for use as reinforcement in concrete castings.
2. Description of the Prior Art
Reinforcement assemblies for concrete castings comprising a substantially rectangular frame and crossing runners are disclosed in, for example, CA 2,189,225 (McReynolds). The assembly comprises a first set of runners positioned in the longitudinal direction of the frame and a second set of runners positioned transversely to the longitudinal direction of the frame. The two sets of runners are assembled to form a hatch pattern of runners, using shaped notches arranged in the runners, to accommodate the profile of one runner into a perpendicular runner. The longitudinal runners thus mesh with the corresponding transverse runners. The frame is then put over the runner assembly onto frame notches located at the short ends of the respective runners. A third set of runners, positioned in the longitudinal direction of the frame, is then placed between the individual runners of the first set of runners positioned in the longitudinal direction of the frame, and meshing with the transverse runners. Thereafter, the second set of transverse runners are tilted sideways, so that all longitudinal runners are temporarily interlocked with the transverse runners and a semi-rigid assembly is created, a fourth set of transverse runners is installed and the runners of the fourth set are tilted into their interlocking positions, where they lock the assembly to prevent the removal of any individual runner from the assembly.
Reinforcement assemblies for concrete castings of the type described above generally require a relatively complex frame construction to provide the gripping profile needed for the runners to hold on to the frame. This results in a frame that is unnecessarily complicated and, thus, unnecessarily expensive to manufacture.
SUMMARY OF THE INVENTION
It is an object of the invention to mitigate and/or obviate the above mentioned disadvantages to provide a reinforcement assembly for concrete castings, which is easy and cheap to manufacture and assemble and which provides the required gripping means for the individual runners to provide an enhanced strength for the reinforcement assembly both during assembly and during the actual use of the finished barrier.
In the invention, a substantially rectangular reinforcement assembly for concrete castings is disclosed. The assembly has a longitudinal axis and a transverse axis, and comprises a frame, a first set of longitudinal runners, a second set of transverse runners, and a third set of transverse runners. Each individual runner has two short ends, and each short end has a frame holding means. The runners are arranged in a hatch pattern, where the longitudinal runners are arranged substantially perpendicular to the transverse runners. The first set of longitudinal runners, the second set of transverse runners and the third set of transverse runners are preferably substantially flat.
The frame comprises a first leg member, a second leg member, and a shoulder member. The first leg member has a plurality of through holes, and the second leg member has a corresponding number of through holes which are substantially concentric with the corresponding through holes of the first leg member. Runner end mounting means are arranged in a pair of corresponding through holes of the first and second leg members, respectively, and the frame holding means of each short end of a runner is arranged to engage with an individual runner end mounting means of the frame.
Advantageously, the frame comprises four separate parts, a first longitudinal part and a second longitudinal part together with a first transversal part and a second transversal part.
The reinforcement assembly for concrete castings further advantageously comprises strengthening members, which are longitudinally arranged between the first and second sets of transverse runners to further strengthen the assembly. The strengthening members preferably comprise bars having a cross-sectional shape corresponding to the shape of holes or notches in the first and second transverse runners, respectively.
In one embodiment of the invention, the first leg member, the second leg member and the shoulder member are arranged in a substantially U-shaped cross-section.
In an alternative embodiment of the invention, the first leg member, the second leg member and the shoulder member are arranged in a substantially H-shaped cross-section.
In a further alternative embodiment of the invention, the first leg member, the second leg member, the shoulder member and a closure member are arranged in a substantially closed cross-section, i.e. forming a substantially rectangular cross-section.
Several of the reinforcement assemblies may be interconnected, either before or after casting, to form larger barrier systems, such as walls or floors/ceilings of a building.
Further features of the invention will be described or will become apparent in the course of the following detailed description.
REFERENCES:
patent: 2053135 (1936-09-01), Dalton
patent: 5595034 (1997-01-01), Krysalka et al.
patent: 2189225 (1998-01-01), None
Armstrong R. Craig
Friedman Carl D.
Slack Naoko
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