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Post-tension intersection chair
| Details |
Inventors: Lee, Kenneth; Bennett, Clifford D.;
Assignee: Aztec Concrete Accessories, Inc. (Fontana, CA)
Primary Examiner: Barfield; Anthony D.
Assistant Examiner:
Attorney, Agent or Firm: Wood, Herron & Evans
A chair for supporting and spacing post-tension cables having a generally tapered body with an upper receiving area for securing the cables and a planar base adapted to rest on a flat support surface. The body has inner and outer surfaces that are substantially complementary to one another to allow a plurality of chairs to be stacked together. The receiving area includes posts extending upwardly between notches. The posts define passageways for guiding the cables into the notches. Detents project inwardly from the tops of the posts and fixedly retain the bars within the passageways. The chair may be formed from a resilient polymeric material. |
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DETAILED DESCRIPTION Accordingly, one objective of the present invention is to provide a chair that fixedly retains reinforcement members such as post-tension cables and rebars, thereby eliminating wire tying of the reinforcement members.
Another objective of the invention is to provide post-tension chairs that can be stacked within one another to provide a more efficient method for packaging, storage, and shipment.
It is a further objective of the present invention to provide a chair with a wide base that allows the chair to stand securely.
It is also an objective to provide a plastic chair made of durable, non-corrosive materials that is easy to manufacture and easy to use with post-tension cables.
Briefly stated, these objectives are accomplished by a tapered post-tension intersection chair having a hollow body with a receiving area that fixedly retains the post-tension cables and a wide base which is adapted to rest on a flat support surface.
An upper opening is defined by the receiving area and a lower opening is defined by the base.
The body generally is tapered, having multiple straight sides and a polygonal cross-section, with an inner surface that is complementary to the outer surface.
The chair may also have an elliptical, oval or hybrid cross-section, such as a square with rounded corners.
In accordance with one aspect of the invention, the receiving area secures and retains the post-tension cables in intersecting relationships to each other.
In accordance with another aspect of the invention, the lower opening is larger than the upper opening, and the inner and outer surfaces are substantially complementary to each other, to allow a plurality of chairs to be stacked together, one inside the other, for storage and shipment.
In one embodiment of the invention, the receiving area has a plurality of notches, posts, and detents which cooperate to snap-fit or retain the post-tension cables within the receiving area.
The posts project upwardly between the notches and terminate with the detents, which face horizontally inwardly
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