Stabilized Plug Cutter for Grain-Matched Tapered Deck Plugs

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Solution Overview

Problem

Existing deck board plugs often fail to match the color and texture of the surrounding boards due to differences in raw materials, leading to unsightly and aesthetically displeasing results, and can trap moisture, causing damage and promoting algae growth.

Innovation Solution

A plug cutting tool that produces plugs with an aesthetic exterior surface matching the donor board, featuring a cutting edge that rotates to create a plug face, sidewall, and bottom, with a movable cutting edge to taper the plug for easier installation and a stabilizer to prevent wobbling, allowing for precise matching of grain and color.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If pre-fabricated plugs from packet systems are used to fill screw holes, then the plugging process is simplified and quick, but the plugs fail to match the color and grain of the surrounding deck boards, creating unsightly appearances

Engineering Contradiction:
Improveplugging process simplicityVSAvoidplug appearance matching
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

The system allows the deck builder to create their own custom plugs by cutting them from the actual deck boards using a plug cutter tool. This self-service approach enables the plugs to automatically match the board's color, grain, and texture since they are made from the same material source, eliminating the mismatch problem of pre-fabricated plugs while maintaining operational simplicity through the dedicated cutting tool

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The plug cutter tool enables variation in plug parameters (size, shape, taper) to be customized for each specific application. The cutting tool can create plugs with different dimensions and taper angles suitable for different hole sizes and board types, allowing precise matching to the specific deck board being worked on, thereby achieving both ease of operation and manufacturing precision

Inventive Principle:
Principle #35Parameter changes

2Productivity

If plugs from different batches of raw materials are used, then the plugging process is efficient and fast, but the plugs exhibit different shades or hues that contrast with the surrounding board, drawing unwanted attention

Engineering Contradiction:
Improveplugging efficiencyVSAvoidcolor and grain matching
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

By enabling the user to cut plugs directly from the deck boards themselves, the system ensures that plugs are made from the exact same batch of raw material as the boards. This eliminates the color and grain mismatch issue that occurs with pre-fabricated plugs from different batches, while maintaining high productivity through the efficient cutting process

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system creates locally-matched plugs by cutting them from the specific deck board or scrap material from the same batch. Each plug is produced with the local quality characteristics (color, grain, texture) of its source material, ensuring perfect visual integration with the surrounding board area where it will be installed

Inventive Principle:
Principle #3Local quality

3Ease of manufacture

If plugs with uniform cylindrical shape are used, then the manufacturing process is simple, but the plugs are difficult to install tightly into holes without excessive force or splitting the board

Engineering Contradiction:
Improveplug production simplicityVSAvoidplug installation ease
Core Design Contradiction:
Ease of manufactureVSEase of operation

Solution Approach 1:

The plug cutter tool creates dynamic, variable geometry plugs with tapered shapes rather than uniform cylinders. The taper allows the plug to be easily inserted into the hole with less force, and then expanded or compressed during installation to achieve a tight fit. This dynamic shape change during installation improves ease of operation while the cutting process remains relatively simple

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system produces asymmetric tapered plugs instead of symmetric cylindrical plugs. The tapered geometry (smaller diameter at one end) facilitates easier insertion into holes, reducing the risk of board splitting, while still allowing for a secure fit once installed. This asymmetric design improves installation ease without significantly complicating the manufacturing process

Inventive Principle:
Principle #4Asymmetry

4Strength

If screw heads penetrate deeply into deck board surfaces, then the fastening strength is increased, but large unsightly holes are created that are difficult to plug aesthetically

Engineering Contradiction:
Improvefastening strengthVSAvoidhole appearance and plugging difficulty
Core Design Contradiction:
StrengthVSManufacturing precision

Solution Approach 1:

The plug cutter tool can create plugs with customized parameters including size, shape, and taper to match the specific hole dimensions created by deep screw penetration. This allows for precise fitting plugs that can aesthetically cover large holes while maintaining the beneficial deep fastening strength, as the plug parameters are adjusted to the specific hole characteristics rather than using fixed-size plugs

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS20240390994A1Plug cutting tool and related method of use
Publication Date: 2024.11.28 NAT NAIL CORP
  • US20240390994A1 patent drawing
  • US20240390994A1 patent drawing
  • US20240390994A1 patent drawing

AI summary

A plug cutting tool that produces plugs having an aesthetic exterior surface common to a donor board. The tool can include a tool axis; a cutting edge that rotates about the tool axis and advances the tool into a donor board face to produce a plug having a plug face including the aesthetic exterior surface, a plug sidewall and a plug bottom; and another cutting edge that is selectively moveable toward the plug axis to taper the plug below the plug face. The tool can include a stabilizer that simultaneously engages the donor board face as the tool rotates, and impairs the tool from wobbling or walking along the board face as the cutting edge penetrates the board face. The tool can include a bearing surface that allows the other cutting edge to be leveraged against the plug sidewall to produce the taper. A related method of use is provided.