Power Tool Pipe Cutter With Cog-Driven Rotating Blade

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Solution Overview

Problem

Existing cutters for power tools are laborious to operate due to their operational processes, particularly when cutting various pipes.

Innovation Solution

A cutter design incorporating a housing assembly with a cog system and a blade that rotates between deployment and cutting positions, synchronized with a power tool, featuring a clamping device for stable cutting and a reset mechanism for efficient operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the pressing handle is operably rotated to drive the pressing structure, then the blade is pushed and the stopping member displaces multiple serrations, but the operational process becomes laborious

Engineering Contradiction:
Improveease of operationVSAvoiddevice complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the manual mechanical pressing operation with a power tool-driven system. The power tool (e.g., drill or impact driver) provides rotational force through a drive shaft that engages with a gear mechanism, automatically advancing the blade through the piping material without requiring manual rotation of a pressing handle.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The blade advancement mechanism is designed to be self-actuating through the power tool's rotational motion. The gear system automatically converts the power tool's rotation into linear blade advancement, and the blade itself advances through the material without requiring separate manual operations for each serration displacement.

Inventive Principle:
Principle #25Self-service

2Productivity

If the blade is manually advanced through multiple serrations, then cutting capability is achieved, but the operational process is laborious and time-consuming

Engineering Contradiction:
ImproveproductivityVSAvoidloss of time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The power tool-driven blade advancement system enables continuous cutting action without interruption. The blade rotates continuously with the power tool while automatically advancing through the material, eliminating the stop-and-go nature of manual serration-by-serration advancement and maintaining continuous useful cutting action throughout the operation.

Inventive Principle:
Principle #20Continuity of useful action

Data Source

PatentUS12434401B2Cutter adapted for use with a power tool
Publication Date: 2025.10.07 HONG ANN TOOL INDS
  • US12434401B2 patent drawing
  • US12434401B2 patent drawing
  • US12434401B2 patent drawing

AI summary

A cutter includes a main body, a cog assembly, and a blade. The main body is provided with an anvil. The cog assembly includes a drive shaft and a first and a second cog. The drive shaft is rotatably connected to the main body. The drive shaft has a first end configured to detachably connect which a power tool. The first cog moves synchronously with the drive shaft. The second cog is rotatably connected to the main body and rotates upon rotation of the first cog. The blade is rotatably connected to the main body and connected to the second cog. The blade is rotatable between a deployment position and a cutting position and has a cutting edge. The cutting edge is disposed away from the anvil when the blade is in the deployment position, but is adjacent to the anvil when the blade is in the cutting position.