Segmented Snowplow Cutting Edge With Debris-Blocking Retainer Plate

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Solution Overview

Problem

Current snowplow blades are susceptible to obstruction and clogging by debris such as dirt and snow due to designs with openings that allow debris to pass through and interfere with the vertical movement of blade segments.

Innovation Solution

A cutting edge system for snowplows featuring a backing plate with central openings and slots for slidably mounting cutting edge segments, including a compression member to absorb upward movement and a retainer plate to cover the segments, preventing debris accumulation while allowing vertical movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If openings are provided in blade segments to allow vertical movement, then the blade segments can follow ground contours, but debris such as dirt and snow can pass through the openings and obstruct the movement

Engineering Contradiction:

Improveability to follow ground contoursVSAvoidresistance to debris obstruction

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A retainer plate is introduced as an intermediary component between the blade segment and the external environment. The retainer plate covers the openings in the blade segment, preventing debris from entering and obstructing the vertical movement mechanism, while still allowing the blade segment to move vertically to follow ground contours

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The cutting edge is divided into multiple replaceable blade segments that can independently move vertically. Each segment can be individually adjusted to follow ground contours, and the segmented design allows for easy replacement of individual segments without replacing the entire blade assembly

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If individual cutting edge segments are used to contour to uneven surfaces, then the blade can adapt to ground variations, but the complexity of the blade structure increases

Engineering Contradiction:

Improveability to contour to uneven surfacesVSAvoidblade structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The cutting edge is divided into multiple independently movable blade segments mounted on a backing plate. Each segment can move vertically to follow ground contours, providing adaptability to uneven surfaces. The segments are simplified through the use of a common backing plate with standardized mounting features

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The blade segments are designed to be dynamically adjustable, allowing vertical movement relative to the backing plate. This dynamic capability enables the blade to automatically adapt to varying ground contours without requiring complex active control systems

Inventive Principle:

Principle #15Dynamics

3Productivity

If the cutting edge engages the ground surface, then effective snow and debris removal is achieved, but damage to the blade may occur requiring replacement

Engineering Contradiction:

Improvesnow and debris removal effectivenessVSAvoidblade durability

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The cutting edge is segmented into replaceable individual segments rather than a single monolithic blade. This allows only the damaged segments to be replaced while the rest of the blade assembly remains intact, significantly reducing replacement costs and downtime

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The blade segments are designed with sufficient strength and toughness to withstand ground engagement forces, and the modular design provides a built-in backup system where undamaged segments can continue functioning even if some segments are damaged or worn

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system effectively prevents debris obstruction and allows the cutting edge segments to follow ground contours without clogging, enhancing the durability and efficiency of the snowplow blades.

Implementation Method 1

a compression member configured to be retained in between the uppermost edge of the intermediate pocket portion and an engaging surface extending from the central opening of the backing plate. The compression member is configured to absorb upward movement of the blade segment when the cutting edge engages the ground surface.

Methodology Applied

Scientific EffectCompression: Compression

Data Source

PatentUS12571175B2Cutting edge systems for snowplow moldboards

Publication Date: 2026.03.10 1708828 ONTARIO OA HORST WELDING

AI summary

Snowplow blades and cutting edge systems for snowplow blades are described herein. The cutting edge systems include a backing plate coupled to a bottom portion of a moldboard of the snowplow blade and a plurality of cutting edge segments each configured to be slidably mounted to the front surface of the backing plate. The backing plate has, for each of the blade segments, a central opening, a first slot positioned on a first side of the central opening and a second slot positioned on a second side of the central opening. Each cutting edge segment includes a blade segment, a compression member and a retainer plate.