Post Pulling Device Beveled Aperture Reinforcement

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Solution Overview

Problem

Removing large wooden posts from the ground is challenging due to their size and weight, often requiring significant effort and difficulty in manipulation.

Innovation Solution

A post pulling device with a planar, rigid body that includes a post aperture with a beveled edge and reinforcement members, designed to be coupled with a lifting machine for easy removal of posts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual methods are used to remove large wooden posts, then the process requires significant physical effort and is difficult to manipulate, but using heavy machinery directly may cause damage to the post or surrounding structure

Engineering Contradiction:
Improveease of post removalVSAvoidstructural integrity during removal
Core Design Contradiction:
Ease of operationVSStrength

Solution Approach 1:

The post pulling device serves as an intermediary between the lifting machine and the post. It distributes the lifting forces through its planar body and reinforcement members, preventing direct concentration of force on the post that could cause damage, while still enabling mechanical advantage for removal

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The device segments the force application process by using a distributed reinforcement member structure rather than a single point of force application. This segmentation allows forces to be distributed across multiple contact points on the post, reducing localized stress and potential damage

Inventive Principle:
Principle #1Segmentation

2Device complexity

If a simple aperture design is used in the post pulling device, then the device structure is simpler, but the engagement with the post is insufficient and the device may fail under heavy loads

Engineering Contradiction:
Improvestructural simplicityVSAvoidengagement reliability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The aperture incorporates an asymmetric beveled edge design where one side is angled differently from the other. This asymmetric geometry provides superior engagement with the post by creating a mechanical interlock that prevents slippage while maintaining structural efficiency

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

The reinforcement members are strategically positioned at specific locations around the aperture rather than uniformly distributed. This local quality approach places structural strength exactly where needed to handle the concentrated loads during post engagement and removal

Inventive Principle:
Principle #3Local quality

3Productivity

If the post pulling device is designed for large posts only, then it is highly effective for that specific application, but it cannot be used for posts of varying sizes

Engineering Contradiction:
Improveremoval efficiencyVSAvoidadaptability to different post sizes
Core Design Contradiction:
ProductivityVSAdaptability or versatility

Solution Approach 1:

The device is designed with a universal aperture size and geometry that can accommodate posts of varying diameters. The beveled edge configuration and reinforcement member arrangement create a adaptable engagement interface that maintains effectiveness across different post dimensions

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250172013A1Post pulling device
Publication Date: 2025.05.29 MACDONNELL DEREK
  • US20250172013A1 patent drawing
  • US20250172013A1 patent drawing
  • US20250172013A1 patent drawing

AI summary

A post pulling device that is configured to surroundably mount a post and be operably coupled to a lifting machine so as to facilitate removal of the post from the ground. The present invention includes a body wherein the body is planar in manner having a first side and a second side. The body has a post aperture formed therein proximate the second side that is annular in shape. The post aperture includes a beveled perimeter edge that facilitates improved engagement with a post. The body has a plurality of reinforcement members secured to the second side of the body wherein the reinforcement members are longitudinally oriented between the first end and second end of the body. A connection aperture is formed in the body proximate the first end and is operable to have a fastener coupled thereto.