Pittsburgh Lock Seam Spreader Wheel for Fast Duct Opening
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Solution Overview
Problem
Existing methods for opening Pittsburgh lock seam channels in ductwork components are inefficient, requiring significant manual effort, inconsistent performance, and slow operational velocity compared to other manual solutions.
Innovation Solution
A mobile tool system comprising a frame, a spreader wheel supported on the frame for rotation, and a guide fixedly supported on the frame, which includes a powered driver for efficiently opening Pittsburgh lock seam channels by rotating the spreader wheel and advancing the tool along the channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual prying tools are used to open Pittsburgh lock seam channels, then the tool can be simple in structure, but significant manual effort is required and operational velocity is slow
Solution Approach 1:
The patent replaces manual mechanical prying action with a powered rotary mechanism. A motor-driven shaft rotates a spreader wheel that inserts into the lock seam channel and uses rotational mechanical advantage to pry the channel open, eliminating the need for manual leveraging and significantly increasing operational speed while reducing human effort
Solution Approach 2:
The spreader wheel features a curved or rounded peripheral edge that contacts the lock seam channel. This curved geometry allows the wheel to effectively engage and pry apart the tightly folded metal edges of the channel, providing mechanical advantage through rotational motion while maintaining consistent contact with the workpiece
2Productivity
If rotary tools are used to open Pittsburgh lock seam channels, then operational velocity improves, but the tools are difficult to use or provide inconsistent performance
Solution Approach 1:
The spreader wheel is designed with a universal geometry that can effectively engage various sizes and configurations of Pittsburgh lock seam channels. The curved peripheral edge and rotational mechanism provide consistent prying action regardless of specific channel dimensions, eliminating the performance inconsistency associated with specialized rotary tools
Solution Approach 2:
The spreader wheel acts as an intermediary between the powered shaft and the lock seam channel. It translates rotational motion into effective prying force through its curved geometry, providing a consistent mechanical interface that ensures reliable performance across different operating conditions
3Reliability
If large machinery is used to reform the lock channel, then the channel can be opened effectively, but the equipment is complex and not mobile
Solution Approach 1:
The tool is segmented into discrete, modular components: a powered driver, a shaft, a spreader wheel, and a guide. This segmentation allows the system to deliver the effective prying action of large machinery through a compact, mobile configuration that can be easily positioned and operated at different locations along the ductwork
Solution Approach 2:
The invention transitions from the dimensional complexity of large stationary machinery to a compact handheld configuration by utilizing rotational motion in a different spatial dimension. The spreader wheel's rotation creates the necessary prying force through a compact mechanical pathway that eliminates the need for large equipment
Data Source
AI summary
A tool system including a tool and a powered driver, and the associated method of operation is provided for opening a Pittsburgh lock seam channel formed in a work piece, such as a ductwork component, or otherwise for separating folded sheet material layers. The tool includes a rotatable spreader wheel and a fixed guide respectively supported on a frame in a common plane. The powered driver can rotate the spreader wheel within the lock seam channel or between sheet material layers, separating the adjacent layers and advancing along a length of the work piece.