Cranial Perforator Simplified Design for Single-Use Safety
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Solution Overview
Problem
Prior-art cranial perforators are complex to manufacture and assemble due to numerous parts, leading to sizing and positioning uncertainties, which can result in damage to the dura mater and require multiple uses, potentially transmitting infectious prions despite sterilization.
Innovation Solution
A cranial perforator with a simplified structure comprising a rotating element, first and second drill-heads with teeth, a sliding pivot link, and irreversible elastic interlocking, eliminating intermediate parts and threaded zones to ensure precise rotation and translation, facilitating single-time use and preventing reutilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If prior-art cranial perforators use multiple intermediate parts and threaded zones for connection, then the device can be assembled and disassembled, but the manufacturing complexity increases and sizing/positioning uncertainties accumulate
Solution Approach 1:
The patent merges multiple intermediate parts (intermediate ring, transmission rod, compression bead) into a single integrated drilling device where the first and second drill-heads are directly connected. This eliminates the need for multiple assembled components, reducing manufacturing complexity and eliminating sizing/positioning uncertainties while maintaining the functional capability of sequential bone drilling.
2Reliability
If prior-art cranial perforators use multiple assembled parts, then the device can be sterilized and reused, but the risk of infectious prion transmission increases
Solution Approach 1:
The patent designs the drilling device as a single-use disposable instrument that is sterilized in its packaging and discarded after one use. This eliminates the risk of prion transmission associated with reusing complex multi-part devices, while the simplified monolithic structure makes the disposable design economically viable compared to sterilizing and reassembling multiple precision components.
3Manufacturing precision
If prior-art cranial perforators have many parts with accumulated sizing uncertainties, then manufacturing is flexible, but positioning precision deteriorates
Solution Approach 1:
By combining multiple separately manufactured parts into a single integrated device, the patent eliminates the accumulation of sizing and positioning uncertainties that occur when assembling multiple components. The monolithic structure ensures precise relative positioning of the first and second drill-heads without requiring tight tolerances on multiple mating surfaces and threaded connections.
4Productivity
If prior-art cranial perforators use complex assembly structures, then the device can be manufactured with standard processes, but the assembly time and uncertainty increase
Solution Approach 1:
The patent eliminates the need for complex assembly operations involving multiple intermediate parts, threaded fasteners, and precision alignment procedures. The integrated design allows the drilling device to be manufactured as a single component or pre-assembled unit, dramatically reducing assembly time and eliminating assembly-related uncertainties while maintaining all necessary functional capabilities.
Data Source
AI summary
Cranial perforator (1) comprising a rotating element (10) capable of being fixed to a driving element, a first drill-head (20) and a second drill-head (30), clutch means (50) disposed on the first drill-head (20) and the rotating element (10) means of disengagement (60) from a engaged position of the first drill-head (20) to an idle position of the first drill-head (20) and a casing (40) fixed at one of its extremities to the rotating element (10) and partly encasing the second drill-head (30).