Woodworking Pushblock With Compressible Heel for Corner Conformance

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional pushblocks with fixed heels require precise positioning and rotational alignment, which can lead to damage of the workpiece underside, reduced control, and safety hazards due to improper placement, and the center leg is susceptible to saw blade damage.

Innovation Solution

A pushblock with a compressible heel that can be partially or fully compressed, allowing it to conform to the workpiece's corners without exact alignment, and features a center leg with a tunnel to reduce saw blade damage risk.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a fixed heel is used in the pushblock, then the heel can push the workpiece effectively, but precise positioning and rotational alignment are required which slows down operation

Engineering Contradiction:

Improveheel pushing effectivenessVSAvoidoperation speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The heel is changed from a fixed rigid structure to a compressible structure that can change its compression state. This allows the heel to adapt to different positioning scenarios - when properly positioned it compresses to provide pushing force, when mispositioned it compresses to allow the pushblock to self-correct without requiring precise alignment

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The heel transitions from a static fixed position to a dynamic compressible element that can adjust its state based on operational needs. The heel can be compressed during positioning errors and then expanded to provide pushing force, eliminating the need for precise initial alignment and rotational orientation

Inventive Principle:

Principle #15Dynamics

2Device complexity

If a fixed heel is used in the pushblock, then the heel structure is simple, but improper placement causes the pushblock to tilt forward compromising safety

Engineering Contradiction:

Improveheel structure simplicityVSAvoidoperator safety

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The heel's compressibility parameter allows it to absorb positioning errors. When the pushblock is improperly placed, the compressible heel compresses to allow the pushblock to settle into a stable position rather than tilting forward, maintaining handle alignment and operator safety without increasing structural complexity

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If a fixed heel is used in the pushblock, then manufacturing is easier, but the heel cannot conform to workpiece corners without exact alignment

Engineering Contradiction:

Improveheel manufacturing simplicityVSAvoidworkpiece corner conformance

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The heel's compressibility allows it to conform to workpiece corners and irregular surfaces by deforming under compression. This maintains manufacturing simplicity while greatly improving adaptability to different workpiece geometries and positioning scenarios

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The compressible heel acts as a flexible element that can deform to match the contours of workpiece corners, eliminating the need for precise alignment while maintaining a simple manufactured structure

Inventive Principle:

Principle #30Flexible shells and thin films

4Force

If downward force is applied to generate frictional push force, then the workpiece can be moved, but the underside of the workpiece may be damaged

Engineering Contradiction:

Improvepush force generationVSAvoidworkpiece underside damage

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The heel acts as an intermediary element that transfers pushing force to the workpiece through lateral contact rather than direct downward pressure. The compressible heel can deform to optimize this lateral force transmission, reducing the downward force needed and minimizing damage to the workpiece underside

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Enhances operational efficiency by eliminating the need for precise positioning, reduces workpiece damage, and improves safety by allowing flexible heel alignment and protecting the center leg from saw blades.

Implementation Method 1

a compressible heel that can be partially or fully compressed, allowing it to conform to the workpiece's corners

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12427691B1Pushblock with compressible heel

Publication Date: 2025.09.30 WANG HENRY

AI summary

A woodworking pushblock (100), having: a body (102); a handle (104) disposed atop the body, and at least one pad (106) secured to an underside (108) of the body. The pad comprises a first end (132A), a second end (132B), a central region (134) disposed therebetween, and at least one compressible heel (130A, 130B) including a heel bottom surface (130BS). In an uncompressed state the at least one heel protrudes downward past the central region. The at least one compressible heel is configured such that any portion of the at least one compressible heel that is subjected to a sufficient upward force applied to the heel bottom surface yields upward until flush with the central region.