Combination Bit for Phillips and Robertson Fasteners
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Solution Overview
Problem
There is a lack of commercially available drivers that can effectively drive both Phillips head and Robertson® head screws, limiting convenience for users who need to handle multiple fastener configurations with a single tool.
Innovation Solution
A combination bit with a hexagonal shank and a working portion featuring a conical end surface with ribs and flutes, designed to accommodate both Phillips head and Robertson® head fasteners, allowing for secure engagement and driving of both types of screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a driver is designed to drive both Phillips head and Robertson head fasteners, then versatility is improved, but the difficulty of engaging the driver with the recess configurations worsens
Solution Approach 1:
The driver bit is divided into multiple functional sections: a Phillips head section with cross-slotted geometry for Phillips fasteners, and a Robertson head section with square geometry for Robertson fasteners. Each section can be independently engaged with its corresponding fastener type, allowing the single driver to handle both configurations effectively without interference between the two drive types.
Solution Approach 2:
The driver transitions from a two-dimensional flat bit design to a three-dimensional multi-section structure with varying geometries along its length. The Phillips section features cross-slotted contours while the Robertson section features square contours, creating dimensional variation that enables engagement with both recess types through the same continuous bit structure.
2Quantity of substance
If a single driver is used for multiple fastener configurations, then the quantity of tools required is reduced, but the reliability of engagement with specific recess configurations worsens
Solution Approach 1:
The driver bit is designed as a universal tool that performs multiple functions by incorporating both Phillips head and Robertson head geometries in a single continuous structure. The bit can be inserted into and driven against both Phillips cross-slotted and Robertson square recesses, providing reliable engagement with either fastener type while eliminating the need for separate dedicated drivers for each configuration.
3Ease of manufacture
If the driver geometry is simplified for ease of manufacture, then manufacturing cost and complexity are reduced, but the ability to effectively engage with both recess types worsens
Solution Approach 1:
The driver combines the Phillips head and Robertson head geometries into a single integrated bit structure rather than using separate bits or interchangeable components. The cross-slotted Phillips section and square Robertson section are merged into one continuous driver body, maintaining manufacturing simplicity through a single-piece construction while achieving versatility in engaging both fastener types.
Data Source
AI summary
Embodiments of a driving tool are disclosed that comprise a shank portion, and a working portion, wherein the working portion is configured to drive either a Phillips head fastener or a Robertson® head fastener.