Rotary Hammer Drill Attachment for Expansion Anchor Setting

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Solution Overview

Problem

The conventional method of installing expansion anchors is labor-intensive, physically demanding, and hazardous, especially when working overhead or from ladders, as it requires manual hammering and balance maintenance, leading to potential anchor failure due to inadequate installation.

Innovation Solution

A power tool attachment with a sliding receiver that stabilizes the expansion anchor, allowing for secure placement and setting without manual hammering, enabling one-handed operation and efficient installation using a rotary-hammer drill, which reduces physical strain and enhances safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If manual hammering method is used to set expansion anchor, then anchor can be installed in rigid material, but installation process becomes labor-intensive and physically demanding

Engineering Contradiction:

Improveease of installationVSAvoidphysical demand on operator

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The patent replaces the manual mechanical hammering system with a power tool-driven mechanical system. The power tool attachment converts rotational motion into axial impact blows, automatically driving the expansion slug into the anchor without requiring manual hammering, thereby reducing physical demand while maintaining installation effectiveness

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The power tool attachment performs the setting function automatically once the hole is drilled. The system self-activates to drive the expansion slug through powered impact blows, eliminating the need for the operator to manually hammer and reducing the installation process to a simple tool change operation

Inventive Principle:

Principle #25Self-service

2Adaptability or versatility

If manual hammering is used for overhead installation, then anchor can be set in ceiling portions, but operator balance and orientation are impaired leading to safety risks

Engineering Contradiction:

Improveability to install overheadVSAvoidsafety risk to operator

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent eliminates manual hammering by substituting it with a power tool system that delivers controlled impact blows automatically. This removes the need for the operator to maintain balance while swinging a hammer overhead, significantly reducing safety risks while preserving the ability to install anchors in ceiling portions and other difficult-to-reach areas

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If conventional setting tool is used, then anchor can be installed, but working area constraints limit the workman's ability to hold tool and swing hammer

Engineering Contradiction:

Improveinstallation capabilityVSAvoidmaneuverability in constrained space

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The patent merges the drilling function and anchor setting function into a single integrated power tool attachment system. The attachment replaces both the drill bit and the separate setting tool, allowing the operator to perform both operations with one tool, thereby improving maneuverability in constrained working areas where there is insufficient space to handle multiple tools

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The power tool attachment is designed to perform multiple functions: it can drill holes using a drilling bit and then immediately switch to setting expansion anchors using the same power tool. This multi-functionality eliminates the need for separate tools and improves ease of operation in constrained spaces

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Reliability

If larger expansion anchors are installed, then higher attachment quality is achieved, but considerably more energy and force are required to position expansion slug

Engineering Contradiction:

Improveattachment qualityVSAvoidenergy required for installation

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent replaces manual mechanical force with a power tool system that delivers high-energy impact blows automatically. The power tool provides the considerable energy and force required to drive expansion slugs in large anchors into their expansion regions, achieving high attachment quality without requiring the operator to manually apply excessive force

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The power tool delivers periodic impact blows to drive the expansion slug into the anchor. This periodic action efficiently transfers energy to overcome friction and material resistance, particularly effective for larger anchors that require considerable force, while allowing the operator to maintain control with minimal physical effort

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS8499427B2Expansion anchor setting apparatus

Publication Date: 2013.08.06 WALLEK THOMAS ALLAN

AI summary

Objects of the present invention provide an attachment for power tools that places and sets expansion anchors. One embodiment of the present invention is directed to a new and improved attachment apparatus for a rotary-hammer type drill, the attachment including a first anchor setting end, a second attachment end, and a handle portion connecting the setting end to the attachment end. The attachment apparatus can be efficiently and easily mounted to the rotary-hammer type drill to simplify the installation of expansion anchors.