Collapsible Hollow-Rod Tool Mechanism for Multi-Function Deployment
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Solution Overview
Problem
Conventional tools with actuating mechanisms in hollow cylindrical shafts or rods typically allow only one mechanism to operate at the end, especially when the inner cross-sectional areas are small, limiting their functionality in applications like down-hole drilling and minimally invasive surgeries.
Innovation Solution
A hollow rod developable actuator tool is designed with multiple actuating mechanisms that can transition from a stowed state within the rod to an extended state outside the rod, allowing for multiple functions such as cutting, gripping, or squeezing, using four-bar mechanisms and actuation methods like cable extension or rotation of concentric cylinders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple tool mechanisms are disposed within a hollow rod, then functionality and versatility are improved, but device complexity increases
Solution Approach 1:
The patent implements multiple tool mechanisms (first tool mechanism and second tool mechanism) nested within the hollow rod structure. Each tool mechanism is contained within the hollow rod and can be deployed independently, allowing multiple functions to be performed through a single entry point while maintaining a compact configuration during navigation.
Solution Approach 2:
The hollow rod is designed to accommodate multiple different tool mechanisms (such as cutting tools, gripping tools, or squeezing tools) within its structure, enabling a single device to perform multiple functions. This multi-functionality is achieved by providing separate tool mechanisms that can be selectively deployed based on the specific task requirements.
2Adaptability or versatility
If multiple tool mechanisms are deployed at the end of the hollow rod, then versatility is improved, but the cross-sectional area requirement increases
Solution Approach 1:
The patent places multiple tool mechanisms within the hollow rod structure, utilizing the internal volume of the rod to house the mechanisms. The tool mechanisms are positioned such that they can be deployed from the end of the hollow rod without significantly increasing the rod's cross-sectional area, as they are contained within the existing structural boundaries.
Solution Approach 2:
The patent transitions the tool mechanisms from a three-dimensional expanded state during deployment to a compressed or folded state during navigation. The mechanisms can be collapsed or retracted into a more compact configuration that fits within the hollow rod's cross-sectional area, allowing them to pass through tight spaces while still providing full functionality when deployed.
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 multiple functions to be performed with a single entry point, reducing the need for multiple tools and entrance points, minimizing workspace trauma, and simplifying control systems, while maintaining a compact stowed state.
Implementation Method 1
The fourth link comprises a first end pivotably connected to a second joint on the first link, a second end pivotably connected to the forth joint of the second link
Implementation Method 2
a fourth link in the second plane perpendicular to the central passage. The first tool member of the second link comprises a body having a first end and a second end, a contact area on the first end of the body, a third joint in proximity to the first end of the body, a fourth joint at the second end of the body. The third link comprises a first end pivotably connected to a first joint on the first link, a second end pivotably connected to the third joint of the second link
Data Source
AI summary
A hollow rod developable actuator tool including a cylinder defining the outer circumference of the hollow rod, a first tool mechanism, and a second tool mechanism. The hollow rod developable actuator tool transitions from a first closed state wherein the first tool mechanism and second tool mechanism are contained entirely within the outer circumference of the hollow rod to a second open state wherein the first tool mechanism and second tool mechanism extent outside the outer circumference of the hollow rod.