Lightweight Pneumatic Percussive Tool With Composite Construction
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Solution Overview
Problem
Pneumatically operated percussive tools, such as chisel hammers or rivet busters, are heavy and cause operator fatigue due to the weight burden, while maintaining durability and impact energy is crucial for performance.
Innovation Solution
A pneumatically operated percussive tool design featuring a lightweight aluminum handle and barrel, a compact throttle and control valve assembly, and a quick-release retainer assembly, which reduces weight without compromising performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional heavy materials and robust construction are used in percussive tools, then durability and impact energy are maintained, but tool weight increases causing operator fatigue
Solution Approach 1:
The patent applies composite materials by combining aluminum alloy for the barrel and handle (providing lightweight properties) with steel components for the piston and impact surfaces (providing durability and impact resistance). This composite approach allows the tool to achieve reduced weight while maintaining the necessary durability and impact energy for percussive operations
Solution Approach 2:
The patent changes material parameters by transitioning from traditional all-steel construction to an aluminum-based composite structure with strategic steel reinforcements. This parameter change in material selection and distribution enables weight reduction while preserving structural integrity and impact performance through optimized material properties in different tool regions
2Ease of operation
If complex valve assemblies and heavy components are used, then reliability and control are improved, but device complexity and weight increase
Solution Approach 1:
The patent merges the throttle valve and control valve into a single integrated valve assembly housed within the aluminum handle. This consolidation combines multiple control functions into one compact unit, reducing the number of separate components, simplifying the overall device structure, and improving ease of operation by providing centralized control in an ergonomically positioned location
Solution Approach 2:
The aluminum handle serves as an intermediary structure that houses and integrates the valve assemblies, providing a compact housing that consolidates control mechanisms. This intermediary housing reduces the spatial distribution of complex components and creates a unified control interface, thereby reducing perceived device complexity while maintaining full control 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
The design achieves a significant weight reduction while maintaining impact energy and ease of use, with improved implement attachment and removal efficiency.
Implementation Method 1
The first manifold is operable to establish fluid communication between the cavity and the bore along the proximal region to drive the piston toward the distal region for engagement with the chisel
Implementation Method 2
the tip of the chisel percussively impacts the workpiece
Data Source
AI summary
An improved pneumatically operated percussive tool and implement with a host of innovative design features that provide improved performance, drastically reduced weight, and speed of implement attachment and removal.