Dead Blow Slide Hammer With Dampening Cavities
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Solution Overview
Problem
Conventional slide hammers provide a short-lived pull force and cause discomfort or injury due to reverberation from the impact and bouncing action, which limits their usability and safety for users.
Innovation Solution
Incorporating internal cavities with dampening materials like steel, lead, or copper pellets within the hammer body to create a 'dead blow' effect, increasing the duration of the pull force and reducing reverberation, thereby enhancing the efficiency and safety of the slide hammer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional slide hammers are used, then the tool can apply pull force to objects, but the pull force only lasts for a short period and causes reverberation that leads to user discomfort or injury
Solution Approach 1:
The patent incorporates a dampening material within the hammer body that creates a 'dead blow' effect. This dampening material is positioned to absorb impact energy before it can reverberate through the tool, thereby extending the duration of the pull force while reducing the harmful shock and reverberation that reaches the user.
Solution Approach 2:
The patent converts the harmful reverberation and bounce-back effect into a beneficial extended duration of force application. By using the dampening material to absorb the rebound energy, the system transforms what would normally be a harmful oscillation into a prolonged, controlled force application that maintains pull pressure for a longer period without causing user injury.
2Force
If the hammer body strikes the stop, then inertia transfers to the shaft generating axial force, but the impact causes bouncing backward and reverberation in the tool
Solution Approach 1:
The dampening material is pre-positioned within the hammer body to cushion the impact when the hammer body strikes the stop. This absorption of impact energy prevents the bouncing backward and reverberation that would otherwise occur, while still allowing the inertia to transfer effectively to the shaft and generate the necessary axial force.
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 'dead blow' effect extends the duration of the pull force and reduces shock transfer to the user, improving the tool's efficiency and reducing the risk of fatigue and injury from repeated use.
Implementation Method 1
Upon impact with the stop, inertia from the mass is transferred to the shaft, generating an axial force on the shaft in the direction the mass had been slid
Implementation Method 2
The inclusion of the dampening material creates the 'dead blow' effect, increasing the duration of the pull-force generated by the impact
Implementation Method 3
Continued use of such slide hammers can cause discomfort or injury to a user whose body repeatedly absorbs part of the shock from the impact and the reverberation
Data Source
AI summary
A dead blow slide hammer body with a through bore that receives and slides on a shaft. The hammer body includes one-or-more internal longitudinal cavities, lateral to the through bore, filled with a dampening material. When the hammer body sliding on the shaft strikes a slide stop, the dampening material creates a “dead blow” effect, increasing the duration of impact, while insulating a user from the shock.