Fastener Driver Tool Electrical Control and Gas Recycling
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Solution Overview
Problem
Conventional pneumatically powered fastener driving tools are inefficient in using compressed gas, leading to a short operational life and limited commercial application due to mechanical mechanisms that do not optimize the power cycle effectively.
Innovation Solution
A fastener driving tool with an electrical control circuit and solenoid valve for precise dosing of compressed fluid, combined with a mechanism to recycle and reuse the gas for both driving and returning the piston, and an anti-siphon device to prevent liquid from interfering with the gas supply, along with a magnetically controlled workpiece contact element for improved activation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional mechanical mechanisms are used to power the fastener driving tool with compressed gas, then the tool can operate, but the operational life is short due to inefficient use of compressed gas
Solution Approach 1:
The patent replaces conventional mechanical triggering mechanisms with an electrical control system that uses a solenoid valve to control compressed gas flow. This substitution enables precise dosing of gas through electronically controlled valve opening times, significantly improving gas utilization efficiency and extending operational life between refills
Solution Approach 2:
The patent implements user-adjustable opening times for the solenoid valve, allowing optimization of gas dosage parameters. By precisely controlling the duration of valve opening, the system adjusts the amount of compressed gas delivered to the piston, maximizing energy efficiency and operational duration
2Productivity
If compressed gas is used to power the piston, then the fastener can be driven, but the piston return requires additional gas or complex mechanical mechanisms
Solution Approach 1:
The patent implements a system where compressed gas is recycled and reused for both the driving stroke and the return stroke of the piston. The same gas supply serves dual purposes, eliminating the need for separate gas reserves or complex mechanical return mechanisms, thereby reducing overall gas consumption while maintaining productivity
Solution Approach 2:
The compressed gas supply system is designed to perform multiple functions: powering the forward driving stroke and enabling the piston return stroke. This multi-functional use of the same gas supply optimizes resource utilization and reduces the total quantity of compressed gas required for complete operational cycles
3Quantity of substance
If liquid is present in the compressed gas container, then the container can be filled, but liquid interferes with gas supply and impairs tool performance
Solution Approach 1:
The patent employs an anti-siphon device that actively removes or prevents liquid from entering the gas delivery system. This extraction mechanism ensures that only compressed gas reaches the tool, excluding liquid that would otherwise interfere with gas flow and impair performance, thereby maintaining reliable gas supply
4Measurement precision
If a magnetically controlled workpiece contact element is used, then activation precision is improved, but the device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical contact detection mechanisms with a magnetically controlled workpiece contact element. This substitution uses magnetic fields instead of complex mechanical linkages or switches, achieving precise activation detection while actually simplifying the overall device structure through the use of non-contact magnetic control
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 achieves longer operational life of the compressed gas supply, enhances productivity with reduced cycle time, and prevents performance impairment from liquid interference, thereby improving the tool's commercial adaptability.
Implementation Method 1
The controller is electrically connected to a solenoid valve that is configured for controlling the flow of the compressed fluid to the piston
Implementation Method 2
The anti-siphon device is designed for use in either a reusable or a disposable pressurized container. In some embodiments, the anti-siphon tube is provided with specialized structures for impeding the flow of pressurized liquid into the tube
Implementation Method 3
a magnet is configured for holding the workpiece contact element in a rest position, and returning the element to the rest position after fastener driving
Data Source
Figure 1
Figure 2
Figure 3~4B
AI summary
A fastener driver tool powered by a pressurized power source having a supply of compressed fluid includes a magazine associated with the tool for storing and supplying fasteners to a tool nose. A cylinder in the tool has a reciprocating piston associated with a driver blade sequentially engaging fasteners from the magazine as they are fed into tool nose. A control system is configured for directly electrically controlling a flow of compressed fluid for driving the piston.