Chopper blade assembly

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Solution Overview

Problem

Existing food choppers often fail to achieve complete chopping due to chopped food pieces sticking to the underside of the cover or upper portion of the receptacle, requiring manual intervention to access them.

Innovation Solution

A food chopper blade column with cantilevered blades, where upper blades have a single bevel cutting edge on their lower face to direct food downward and lower blades have a single bevel on their upper face to direct food upward, ensuring continuous chopping without manual intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If food is chopped in a conventional chopper, then the chopping function is provided, but the chopped food pieces stick to the underside of the cover or upper portion of the receptacle requiring manual intervention

Engineering Contradiction:

Improvechopping completenessVSAvoidmanual intervention time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The blade configuration is inverted compared to conventional choppers. The upper blades have the cutting edge on their lower face and the lower blade has the cutting edge on its upper face. This inversion causes food to be directed toward the center and downward, preventing it from sticking to the cover or upper receptacle portions, thereby eliminating the need for manual intervention to access stuck food pieces

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

Different blades are given different local qualities in terms of cutting edge orientation. The upper blades have cutting edges on their lower faces while the lower blade has a cutting edge on its upper face. This localized differentiation in blade geometry creates specific food flow patterns that direct chopped pieces away from sticking surfaces, solving the problem of food adhesion without requiring manual intervention

Inventive Principle:

Principle #3Local quality

2Productivity

If conventional blade configuration is used, then the structure is simple, but the chopping efficiency is insufficient due to food sticking

Engineering Contradiction:

Improvechopping efficiencyVSAvoidblade configuration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The blade column incorporates blades with locally differentiated cutting edge orientations. Upper blades have cutting edges on their lower faces while the lower blade has a cutting edge on its upper face. This localized quality variation optimizes food flow and chopping efficiency without significantly increasing overall device complexity, as the blades themselves remain simple in form

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The blade configuration inverts the conventional arrangement by placing cutting edges on opposite faces of upper versus lower blades. This inversion improves chopping efficiency by preventing food adhesion to the cover and upper receptacle, while maintaining relatively simple blade structures that do not substantially increase device complexity

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS11779157B2Chopper blade assembly

Publication Date: 2023.10.10 PARTY IP HOLDINGS LLC

AI summary

A food chopper blade column for use in a food chopper having a receptacle and cover. The column will be rotated in a cutting direction within the chopper during use, and mounts a plurality of cantilevered blades spaced circumferentially about the column. The upper blades include a leading edge having a single bevel cutting edge on their lower face, as well as trailing edge which is angled downward. The lowermost blade includes a leading edge having a single bevel cutting edge on its upper face, and a flat trailing edge.