Hydraulic Tree Branch Shear for Skid-Steer Loaders

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Solution Overview

Problem

Existing systems for hydraulic tree branch shears lack an efficient and economical solution for cutting down tree branches in hard-to-reach areas, particularly when integrated with a skid-steer loader, and often require additional costly equipment and labor.

Innovation Solution

A hydraulic tree branch shear system featuring a shear assembly mounted on a skid-steer loader, comprising a base, elongated body, support members, and a head with a pivoting jaw and hydraulic attachment, allowing for remote control operation to efficiently cut branches without the need for extra machinery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional manual methods are used to cut tree branches, then equipment cost is low, but time consumption and labor requirements increase significantly

Engineering Contradiction:
Improvebranch cutting efficiencyVSAvoidtime consumption
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The patent applies hydraulic power transmission to drive the shear mechanism. A hydraulic motor converts hydraulic energy from the skid-steer loader into rotational motion of the shear shaft, enabling high-speed cutting operations that would be impossible with manual methods, thus dramatically improving productivity while reducing time consumption.

Inventive Principle:
Principle #29Pneumatics and hydraulics

Solution Approach 2:

The invention makes the skid-steer loader multi-functional by attaching the shear assembly to its existing hydraulic system. This allows the loader to perform both its original earthmoving functions and new tree branch cutting functions, eliminating the need for separate equipment and significantly improving operational efficiency.

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

2Productivity

If specialized tree branch cutting equipment is purchased, then cutting efficiency improves, but equipment cost and complexity increase

Engineering Contradiction:
Improvebranch cutting efficiencyVSAvoidequipment complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent merges the tree branch cutting function with the existing skid-steer loader platform. By integrating the shear assembly into the loader's hydraulic system and using the loader's existing power source, the invention eliminates the need for a separate dedicated tree branch cutter, thereby reducing overall equipment complexity while maintaining high cutting efficiency.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The skid-steer loader becomes a universal machine capable of performing multiple functions including earthmoving and tree branch cutting. This multi-functionality approach reduces the total number of specialized equipment pieces needed, simplifying the overall equipment inventory and reducing complexity.

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

3Object-affected harmful factors

If manual branch cutting is performed, then equipment cost remains low, but safety risks increase due to operator exposure

Engineering Contradiction:
Improveoperator safetyVSAvoidoperator convenience
Core Design Contradiction:
Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent replaces manual mechanical cutting operations with a hydraulically-powered automated shear mechanism. The operator controls the cutting process remotely from within the protected cab, eliminating direct exposure to dangerous moving blades and improving safety while maintaining ease of operation through simple hydraulic controls.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The hydraulic system acts as an intermediary between the operator's control inputs and the shear mechanism. This allows the operator to control the powerful cutting action from a safe distance, with the hydraulic fluid transmitting force and motion without requiring direct mechanical contact between the operator and the cutting elements.

Inventive Principle:
Principle #24Intermediary (Mediator)

4Adaptability or versatility

If additional specialized machinery is acquired for hard-to-reach branches, then cutting capability improves, but cost and maintenance requirements increase

Engineering Contradiction:
Improvereach capabilityVSAvoidimplementation cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent extends the operational reach in a new dimension by utilizing the skid-steer loader's inherent mobility and articulation capabilities. The loader can position itself close to hard-to-reach branches and extend its reach using the attached shear assembly, eliminating the need for additional specialized reach equipment while maintaining adaptability to various cutting positions.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The skid-steer loader serves as a universal platform that can access various positions and angles needed for cutting hard-to-reach branches. Its existing mobility and maneuverability, combined with the attached shear assembly, provide the necessary reach capability without requiring additional specialized machinery, thereby reducing implementation and maintenance costs.

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

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

Enables safe, efficient, and cost-effective cutting of tree branches in hard-to-reach areas using existing skid-steer loader equipment, reducing the need for additional machinery and labor while maintaining operational simplicity and effectiveness.

Implementation Method 1

hydraulic attachment (29)

Methodology Applied
Scientific EffectHydraulic pressure: Hydraulic Press

Data Source

PatentUS11503779B1System for a hydraulic tree branch shear
Publication Date: 2022.11.22 HARTLE TODD
  • US11503779B1 patent drawing
  • US11503779B1 patent drawing
  • US11503779B1 patent drawing

AI summary

A system for a hydraulic tree branch shear including a skid-steer loader and a shear assembly. The skid-steer loader of the system for a hydraulic tree branch shear may be an existing skid-steer loader adapter to have the shear assembly attached thereon. The shear assembly is powered by a hydraulic attachment that is configured to be powered from the skid-steer loader. Additionally, the controls for the shear assembly are configured to be attached to the existing controls of the skid-steer loader. The shear assembly is mounted to the skid-steer loader and allows a user to cut down hard to reach tree branches from the comfort of the skid-steer loader. Furthermore, the use of the skid steer loader provides a user protection from having tree branches falling on the user's head.