Pneumatic Fastener Driver With Magnetic Latch
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Solution Overview
Problem
Existing fastener drivers face power, size, and cost constraints, and often require external air sources, limiting their versatility and efficiency in driving fasteners into workpieces at varying depths.
Innovation Solution
A pneumatic fastener driver with an on-board air compressor and a magnetic latch system that allows the piston to move between top-dead-center and bottom-dead-center positions, using adjustable magnetic forces to drive fasteners into a workpiece at different depths without external air pressure, featuring a cylinder-in-a-cylinder configuration and one-way check valves for pressure management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If external air sources are used to power fastener drivers, then sufficient power can be achieved, but device complexity and portability are reduced
Solution Approach 1:
The patent combines the air compressor, storage tank, and fastener driver into a single integrated handheld device. The compressor motor, compression chamber, storage chamber, and driver mechanism are merged into one unit that can be held and operated by a single user, eliminating the need for external air sources while maintaining sufficient power for driving fasteners.
Solution Approach 2:
The device performs multiple functions within a single unit: the motor acts as both the compressor driver and potential fastener actuator, the compression chamber serves as both compression space and pressure source, and the storage chamber provides both air storage and pressure regulation. This multi-functionality reduces overall device complexity while maintaining power capability.
2Adaptability or versatility
If adjustable magnetic force is used to control fastener driving depth, then versatility is improved, but device complexity increases
Solution Approach 1:
The magnetic latch mechanism provides dynamic control of the piston's release point through adjustable magnetic force. By varying the magnetic field strength, the system can release the piston at different positions during its stroke, thereby controlling fastener driving depth. This dynamic adjustment mechanism adds versatility while maintaining relatively simple structural implementation.
Solution Approach 2:
The system controls fastener driving depth by changing the magnetic force parameter. The adjustable magnetic latch modifies the magnetic field strength to vary the holding force on the piston, which directly changes the release timing and consequently the driving depth. This parameter-based control approach achieves versatility without complex mechanical adjustments.
3Ease of operation
If on-board air compressor is integrated, then portability is improved, but device size increases
Solution Approach 1:
The device employs a nested chamber configuration where the compression chamber is positioned within or adjacent to the storage chamber, and the driver mechanism is integrated into the same housing. This nesting arrangement allows multiple functional chambers to occupy overlapping or adjacent spatial volumes, reducing the overall device footprint while maintaining all necessary functions for portability.
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
Enables efficient and adjustable fastener driving without external air sources, allowing for precise control of driving depth through adjustable magnetic forces, enhancing versatility and reducing size and cost constraints.
Implementation Method 1
a magnetic latch (114) emitting a magnetic field that magnetically attracts the piston (70) and is capable of holding the piston (70) in the top-dead-center position with a magnetic force
Implementation Method 2
with an on-board air compressor
Data Source
AI summary
The invention provides, in one aspect, a pneumatic fastener driver including a cylinder and a piston positioned within the cylinder. The piston is moveable between a top-dead-center position and a bottom-dead-center position. The driver also includes a magnetic latch emitting a magnetic field that magnetically attracts the piston and is capable of holding the piston in the top-dead-center position with a magnetic force. The magnetic latch is adjustable to vary the magnetic force acting on the piston for driving fasteners into a workpiece at different depths.