Axially Affixed Compound-Squeezing Disk for Reliable Screw Anchoring
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Solution Overview
Problem
Existing fastening methods for tapping screws in substrates, such as concrete, face challenges in achieving easy and reliable anchoring with high load values, particularly under static, dynamic, and seismic loads, and often require additional steps for compound application and depth measurement.
Innovation Solution
A fastening arrangement featuring a screw with a shank and thread, a squeezing unit containing a compound reservoir and a squeezing disk, and a holding element that secures the disk in the drilled hole, allowing the compound to be automatically applied between the shank and the hole wall as the screw is tightened, ensuring high load values and reliability without separate compound metering or depth measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate compound metering procedure is used during screw placement, then the compound application precision is improved, but the process complexity and time consumption increase
Solution Approach 1:
The patent combines the compound reservoir with the squeezing unit, integrating the compound storage and application functions into a single integrated assembly. This eliminates the need for separate compound metering equipment and procedures, reducing process complexity while maintaining reliable compound application through the squeezing mechanism
Solution Approach 2:
The squeezing unit automatically dispenses compound through the squeezing disk as the screw is installed, without requiring external metering equipment or separate application steps. The system serves itself by using the installation process to automatically control compound dispensing, eliminating the need for separate measurement and application procedures
2Quantity of substance
If the drilled hole depth is standardized, then the compound quantity can be controlled, but the adaptability to different installation scenarios is reduced
Solution Approach 1:
The patent employs a flexible holding element that can accommodate drilled holes of variable depths. The holding element adjusts its position along the screw shank to match different hole depths, allowing the squeezing unit to function effectively regardless of the specific drilling depth, thus providing adaptability while maintaining compound quantity control through the defined reservoir volume
3Reliability
If additional work steps for compound insertion are required, then the compound application reliability is improved, but the installation time and process complexity increase
Solution Approach 1:
The patent merges the compound application function with the screw installation process by integrating the compound reservoir and squeezing disk into the squeezing unit. This allows compound to be automatically applied during the installation process itself, eliminating separate compound insertion steps while maintaining reliable compound distribution through the controlled squeezing mechanism
Solution Approach 2:
The compound is pre-loaded into the reservoir of the squeezing unit before installation. The squeezing disk is pre-positioned to control compound dispensing. During installation, these pre-prepared elements automatically perform the compound application function, eliminating the need for separate compound insertion steps while ensuring reliable compound placement
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 enables a reliable and easy fastening process with high load-bearing capacity, eliminating the need for additional compound application steps and allowing for variable hole depths, resulting in uniform placement and enhanced reliability.
Implementation Method 1
the volume between the squeezing disk and the shank is reduced so that compound reservoir situated between the squeezing disk and the shaft is squeezed out by the squeezing disk
Data Source
AI summary
A fastening arrangement with a screw having a shank with a front end that is to be inserted into a hole drilled into a substrate, and at least one thread, whereby the thread is arranged on the shank, and with a squeezing unit having a compound reservoir containing a compound for filling a gap that exists between the shank and the wall of the drilled hole, with a squeezing disk towards which the front end of the shank can be moved in order to squeeze the compound out of the reservoir, and having a holding element for fastening the squeezing disk in the drilled hole, whereby, arranged on the holding element, on the one hand, there is the squeezing disk and, on the other hand, a stop element that comes to rest against the opening of the drilled hole.