Perforated Anchor Sheath with Piston for Chemical Fastening
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Solution Overview
Problem
Existing chemical anchors require waiting for polymerization and hardening before applying a load, are laborious to inject resin, and are limited in their ability to adapt to both solid and hollow materials with purely chemical fastening.
Innovation Solution
A chemical anchor with a perforated tubular sheath that includes a piston member, allowing for longitudinal movement within the sheath to mix and expel polymerization components, enabling mechanical engagement and facilitating chemical fastening without waiting for polymerization to complete.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If resin injection is used to fasten the anchor, then chemical bonding is achieved, but the process becomes laborious and time-consuming
Solution Approach 1:
The patent extracts the resin injection step from the fastening process by using a pre-filled capsule containing the resin. The capsule is inserted into the anchor body, eliminating the need for separate resin injection operations. When the screw is tightened, the capsule breaks and releases the resin automatically, simplifying the overall operation while maintaining chemical bonding strength.
Solution Approach 2:
The resin is prepared and enclosed in a capsule in advance, before the actual fastening operation. This preliminary preparation of the resin in a ready-to-use capsule format eliminates the need for on-site mixing and injection, reducing labor and time requirements while ensuring the resin is available exactly when needed during screw installation.
2Adaptability or versatility
If purely chemical fastening is used, then the anchor can be applied to various materials, but loading must wait for polymerization to complete
Solution Approach 1:
The patent merges chemical fastening and mechanical fastening into a single unified system. The anchor body provides chemical bonding through resin polymerization, while the screw provides immediate mechanical fastening. These two mechanisms work together simultaneously, allowing the anchor to adapt to various materials through chemical bonding while enabling immediate loading through mechanical support, eliminating the need to wait for complete polymerization.
3Speed
If a piston member is added to enable mechanical engagement, then immediate loading is possible, but device complexity increases
Solution Approach 1:
The piston member is nested within the anchor body, and the resin capsule is nested within the anchor body alongside the piston. This nested arrangement allows the piston to move longitudinally within the confined space of the anchor when the screw is tightened, enabling mechanical engagement without significantly increasing the overall device complexity. The compact nested structure integrates multiple functions into a space-efficient design.
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
Enables immediate loading of the screw, reduces labor in resin injection, and provides a mechanical component to the fastening process, allowing for effective anchoring in both solid and hollow materials.
Implementation Method 1
a capsule of resin may be slid into, the hole, the capsule containing a capillary tube filled with a hardener, before crushing the combination and mixing the two components
Data Source
AI summary
Anchor for fastening a component to a hollow or solid support material, said anchor comprising a sheath of elongate shape that is intended to be introduced into a hole in said support material, said anchor also comprising a bearing mechanism for bearing against an external face of said support material, situated at a first longitudinal end of said sheath, and a piston member situated at a second, opposite longitudinal end of said sheath and configured to engage with a screw intended to be introduced into said sheath, characterized in that said piston member is configured to be moved longitudinally inside said sheath by said screw.