Pneumatic Hand Tool Actuation Reducing Operator Fatigue
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Solution Overview
Problem
Manually actuated hand tools require significant operator effort, leading to fatigue due to the need for repetitive use of 15-20 lbs of hand-squeezing force, and existing pneumatically operated tools are complex and expensive.
Innovation Solution
A pneumatically actuated hand tool with a mechanical force delivery system, utilizing a pneumatic actuation device and a double-pull safety trigger assembly to generate and deliver mechanical driving force to fasteners, reducing the need for manual effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manually actuated hand tool is used, then device complexity is low, but operator fatigue increases due to repetitive application of 15-20 lbs of hand-squeezing force
Solution Approach 1:
The patent replaces the manual mechanical actuation system with a pneumatic system. Instead of requiring the operator to manually squeeze the tool with 15-20 lbs of force, a pneumatic cylinder generates the driving force through compressed air. This substitution of mechanical input with pneumatic actuation directly reduces operator fatigue while maintaining the tool's functionality.
Solution Approach 2:
The patent implements a pneumatic actuation system using a pneumatic cylinder, air valve, and compressed air supply. The pneumatic cylinder converts pneumatic pressure into mechanical driving force that actuates the fastener delivery mechanism. This pneumatic system eliminates the need for continuous manual squeezing, thereby reducing operator fatigue without significantly increasing overall device complexity.
2Ease of operation
If traditional pneumatic tool is used, then operator fatigue is reduced, but device complexity and cost increase due to expensive die cast housing, air pressure vessel, and multiple signal valves
Solution Approach 1:
The patent merges the pneumatic cylinder housing with the existing tool housing, eliminating the need for a separate expensive die cast housing and air pressure vessel. The pneumatic cylinder is integrated directly into the tool body, and the air valve is combined with the trigger mechanism. This merging of components reduces device complexity and cost while maintaining the pneumatic actuation benefits.
Solution Approach 2:
The patent makes the trigger mechanism multi-functional by integrating it with the air valve control. The trigger not only actuates the mechanical force delivery system but also controls the pneumatic air flow. This multi-functionality reduces the need for separate signal valves and complex pneumatic control systems, thereby reducing device complexity and cost.
3Device complexity
If simple pneumatic actuation is used, then device complexity is reduced, but the ability to deliver sufficient mechanical force may be compromised
Solution Approach 1:
The patent optimizes the pneumatic system parameters including air pressure, cylinder piston area, and stroke length to ensure sufficient mechanical force delivery. By carefully selecting these parameters, the system delivers the necessary driving force for fastener actuation while maintaining a simple pneumatic design without requiring complex high-pressure systems.
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 tool reduces operator fatigue by allowing less manual force to be applied, as the pneumatic actuation device powers the mechanical force delivery system, and is potentially more cost-effective by simplifying the design compared to traditional pneumatic tools.
Implementation Method 1
a pneumatic actuation device that is structured and operable to actuate the mechanical force delivery system
Data Source
AI summary
A hand tool for mechanically generating and delivering a driving force to a fastener. The hand tool includes a mechanical force delivery system that is structured and operable to mechanically generate and deliver a driving force to a fastener. The hand tool additionally includes a pneumatic actuation device that is operatively connected to the mechanical force delivery system. The pneumatic actuation device is structured and operable to actuate the mechanical force delivery system such that the mechanical force delivery system mechanically generates and delivers the driving force.