Gas Spring Fastener Driver With Dry-Fire Lockout
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Solution Overview
Problem
Existing fastener drivers face power, size, and cost constraints, particularly those using compressed air or electrical energy, which limit their effectiveness and efficiency.
Innovation Solution
A gas spring-powered fastener driver with a magazine assembly, nosepiece assembly, pusher assembly, and workpiece contact assembly, featuring a dry-fire lockout mechanism to prevent empty magazine firing, and a pusher assembly that biases fasteners into a driving channel, utilizing a gas spring principle for operation without external air pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If compressed air or electrical energy is used to power fastener drivers, then sufficient driving power can be achieved, but the device size and cost increase
Solution Approach 1:
The patent extracts and eliminates the air compressor and electrical power supply systems from the fastener driver. Instead, it uses a purely mechanical spring-loaded mechanism where a spring stores energy and releases it to drive the fastener, thereby achieving sufficient driving power without the bulk and cost of compressed air or electrical components
Solution Approach 2:
The patent replaces complex pneumatic (compressed air) or electrical power systems with a simple mechanical spring mechanism. The spring stores potential energy when compressed and converts it to kinetic energy to drive the fastener, providing a compact, cost-effective alternative that maintains adequate driving power
2Power
If compressed air or electrical energy is used to power fastener drivers, then sufficient driving power can be achieved, but the device cost increases
Solution Approach 1:
The patent removes expensive air compressors, electrical motors, batteries, and control systems from the fastener driver design. The remaining mechanical spring mechanism consists of simple, inexpensive components that are easier and cheaper to manufacture while still delivering adequate driving power for fastener application
Solution Approach 2:
The patent employs a simple mechanical spring mechanism that uses inexpensive, easily replaceable components. The spring and associated mechanical parts can be manufactured at low cost and replaced if needed, making the overall device more cost-effective than complex pneumatic or electrical systems
3Productivity
If the pusher assembly moves continuously toward the channel, then fasteners are consistently biased, but dry firing may occur when the magazine is empty
Solution Approach 1:
The patent incorporates a sensor that detects the presence of fasteners in the magazine before the driving cycle commences. If no fastener is detected, the system prevents the driving mechanism from activating, thereby avoiding dry firing while maintaining consistent fastener biasing during normal operation
Solution Approach 2:
The patent uses a sensor to provide feedback about fastener presence in the magazine. This feedback mechanism allows the system to monitor the magazine status and prevent driving action when the magazine is empty, ensuring reliable operation without dry firing while maintaining consistent fastener delivery during normal use
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 gas spring-powered fastener driver provides efficient and reliable fastener driving with reduced size and cost, ensuring continuous operation by preventing dry firing and optimizing energy use.
Implementation Method 1
A gas spring is positioned in the magazine assembly and biased to move the fastener toward the driving channel
Data Source
AI summary
A powered fastener driver including: a pusher assembly slidably coupled to the magazine assembly and configured to bias the fasteners within the magazine assembly toward the channel, the pusher assembly including a pusher body, a cover coupled to the pusher body, and a dry-fire lockout member coupled to the pusher body. The powered fastener driver also including a pocket disposed at the second end of the magazine assembly that receives at least a portion of the pusher body when the pusher body is adjacent the second end of the magazine assembly.