Pipe Cutter Holder Assembly for Replaceable Blade Access

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Solution Overview

Problem

Existing pipe cutters require disposal when the blade becomes unusable, as blades are not replaceable, leading to unnecessary waste and increased costs.

Innovation Solution

A pipe cutter design featuring a blade, handle, holder, pivot, and pin system that allows for easy replacement of blades by pivoting the holder to expose the blade aperture, enabling the use of different blades and reducing waste.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the blade is made non-replaceable in the pipe cutter, then the structural simplicity and manufacturing ease are improved, but the device must be disposed of when the blade is out of order, leading to increased costs and waste

Engineering Contradiction:

Improvestructural simplicityVSAvoidblade replaceability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The pipe cutter is divided into separable components: a reusable handle assembly and a replaceable blade assembly. The blade can be independently removed and replaced through the aperture in the handle, allowing users to swap blades without discarding the entire cutter when the blade becomes dull or damaged.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the blade is made replaceable with a pivot and pin system, then the blade can be replaced without discarding the cutter, but the device complexity increases

Engineering Contradiction:

Improveblade replaceabilityVSAvoidmechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The blade is extracted as a separate, removable component from the handle assembly. The aperture in the handle allows the blade to be easily removed and replaced by simply inserting a new blade through the aperture, eliminating the need for complex fastening mechanisms while maintaining replaceability.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of manufacture

If the entire cutter is disposed of when the blade is out of order, then the simplicity of the blade design is maintained, but the loss of substance and increased costs occur

Engineering Contradiction:

Improveblade design simplicityVSAvoidmaterial waste

Core Design Contradiction:

Ease of manufactureVSLoss of substance

Solution Approach 1:

Instead of discarding the entire cutter when the blade becomes unusable, only the blade component is discarded and replaced. The handle and other reusable parts are recovered and continue to be used with new blades, significantly reducing material waste and extending the overall lifespan of the cutting tool.

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS11370042B1Cutter

Publication Date: 2022.06.28 HONG JIN INDUSTRY CO LTD

AI summary

A cutter includes a blade, a handle, a holder, a pivot and a pin. The blade includes an aperture and a slit. The handle includes two lateral plates each of which includes an aperture and a recess. The holder includes a block formed between two lateral plates. The block is inserted in the slit when the blade is inserted in the holder. Each of the lateral plates of the holder includes a rear aperture and a front aperture. The pivot is selectively inserted in the apertures of the handle, the front apertures of the holder and the aperture of the blade to keep the holder in the handle. The pin is selectively inserted in the recesses of the handle and the rear apertures of the holder to keep the holder in a desired angle relative to the handle.