Metal working – Method of mechanical manufacture – Structural member making
Reexamination Certificate
1999-11-15
2001-08-14
Rosenbaum, I Cuda (Department: 3726)
Metal working
Method of mechanical manufacture
Structural member making
C029S897340, C052S220200, C052S323000
Reexamination Certificate
active
06272749
ABSTRACT:
CROSS-REFERENCES TO RELATED APPLICATIONS
(Not applicable)
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT
(Not applicable)
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates generally to form structures utilized for cast-in-place concrete roof and floor decks, and more particularly to self-supporting form structures which are interconnectable to provide a continuous insulated concrete deck system.
(2) Background Information
It is well known in the industry to utilize expanded plastic forms for the construction of poured concrete walls and the like. The expanded plastic forms may either be removed or left in place after the concrete has hardened to provide thermal and sound insulation properties.
A relatively recent adaptation of expanded plastic form structures is disclosed in PCT patent application No. PCT/EP 97/05671, owned by Plastedil S. A. This application discloses a self-supporting construction element made of expanded plastic material which is extruded with steel studs embedded therein. Each panel is molded with a steel stud embedded therein during the molding process. The panels may then be cut to a desired length and interconnected to form a floor upon which concrete may be poured. A lath for supporting at least one layer of a covering material is fastened to the reinforcing bar in the panel, the lath providing fire resistant properties to the panel.
While the Plastedil structure has provided a new system for forming cast and place concrete decks, it suffers several problems.
The equipment needed to mold the plastic panel with the steel reinforcing bar therein is expensive and complicated. Because of the expense and time involved in creating the panels, the cost of using the system can also be prohibitively expensive.
BRIEF SUMMARY OF THE INVENTION
It is therefore a general object of the present invention to provide an improved cast and place concrete deck system.
Another object is to provide self-supporting expanded plastic panels for a concrete deck system which include reinforcing bars, but are simple and inexpensive to manufacture.
Still another object of the present invention is to provide a cast and place concrete deck system which utilizes standard off-the-shelf components and common machinery for the formation of the panel.
These and other objects will be apparent to those skilled in the art.
The method of manufacturing a concrete deck form panel of the present invention includes the initial step of cutting an insert within the panel, which may be removed by sliding the insert longitudinally from the panel. A pair of structural members are attached to the longitudinal sides of the insert, and then the insert is returned to the original position within the panel. A series of panels are connected to form a floor for supporting concrete, thereby forming a concrete deck system. In a second embodiment of the invention each form panel is formed by attaching a pair of structural members to longitudinal sides of a central body and then attaching L-shaped members to the structural members. A top plate is mounted to the top of the L-shaped members and the central body to form the integrated form panel.
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Boeshart Patrick E.
Devine Thomas J.
Cuda Rosenbaum I
Frederiksen Mark D.
Koley Jessen P.C. A Limited Liability Organization
Lite-Form International
Nguyen Trinh
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