Anchor Recess Former With Mechanical Rebar Braces
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Solution Overview
Problem
Current anchor recess formers for concrete items, which attach to reinforcement bars using magnets, tend to move during concrete formation, leading to crooked recesses, concrete seepage, and uneven lifting, causing damage to the concrete item and surrounding structures.
Innovation Solution
A hollow, cup- or half disc-shaped anchor recess former that attaches to rebar and remains in place during concrete curing, featuring upper and lower sections with rebar braces and anchor holes, along with a faceplate to secure the anchor and prevent concrete infiltration, ensuring a uniform recess and stable lifting point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If magnet attachment is used to attach the recess former to rebar, then the device can be easily attached and removed, but the recess former moves during concrete formation causing crooked recesses and concrete seepage
Solution Approach 1:
The patent replaces the magnetic attachment system with a mechanical fastening system using a cap that threads onto the rebar and secures the recess former in place. This mechanical connection provides stable, movement-free attachment during concrete formation while maintaining ease of installation and removal through simple threading actions.
2Productivity
If the recess former is removed before concrete curing, then the form can be reused, but the anchor recess is not properly formed and the anchor cannot be positioned correctly
Solution Approach 1:
The patent incorporates the anchor positioning feature directly into the recess former design, with the anchor placed in its final position within the hollow interior before concrete pouring. The recess former remains in place during curing to ensure proper anchor positioning and recess formation, and is removed only after the concrete has fully cured and gained sufficient strength.
3Ease of manufacture
If concrete is allowed to seep into the recess former, then the hollow interior is filled, but the anchor recess becomes crooked and lifting capability is compromised
Solution Approach 1:
The patent introduces a cap as an intermediary component that seals the hollow interior of the recess former during concrete pouring. This cap prevents concrete from entering the hollow space where the anchor is positioned, while still allowing the concrete to be poured freely into the form. The cap is removed after curing to reveal the properly formed anchor recess.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a stable and uniform anchor recess that remains integral to the concrete item, allowing for safe and efficient lifting without damage, reducing the risk of crooked recesses and concrete seepage, and eliminating the need for post-manufacturing installation of lifting anchors.
Implementation Method 1
The rebar braces (20, 22) are attached to the outer curved rear surface (44, 46) via upper brace supports (26) and lower brace supports (28)
Data Source
AI summary
A device that attaches to the rebar used to manufacture a concrete item and is left in place as the wet concrete is placed within the form for the concrete item and allowed to cure. The device is a hollow, walled, generally cup- or half disc-shaped structure having an outer forming wall and a hollow interior. The device may be a unitary or two part construction having an upper section, a lower section, upper rebar braces, lower rebar braces, and anchor holes. Anchor holes extend through the anchor recess former providing for a passage from the hollow interior to the outside. Upon the curing of the concrete, the present invention becomes an integral part of the concrete item, creating a uniform recess and exposing an anchor that can be used to lift the concrete item.