Orthopedic Cast Splitter Screw Thread Jaw Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing orthopedic cast splitters require significant manual force and dexterity to split orthopedic casts, often necessitating both hands and limiting the ability to easily widen the split.
Innovation Solution
An orthopedic cast splitter apparatus featuring a frame, a pivotally connected handle, a drive rod, and jaws with teeth that translate relative to each other, allowing for forward axial movement to split the cast with minimal manual force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional cast splitters with pivotally connected handles are used, then the device can split the cast, but significant manual force is required and both hands are needed for operation
Solution Approach 1:
The patent replaces the traditional manual pivotally connected handle mechanism with a screw thread mechanism. The screw thread converts rotational motion of the handle into linear motion of the jaw, providing mechanical advantage that reduces the manual force required while allowing operation with one hand. The screw thread acts as a force multiplier, substituting the inefficient direct mechanical leverage of the old system.
Solution Approach 2:
The patent introduces a dynamic screw thread mechanism that allows continuous adjustment of the jaw separation distance. Unlike the static pivotally connected handles that are limited in their range of motion, the screw thread enables the operator to incrementally advance the jaw through rotation, providing controlled dynamic movement that reduces the force needed at each step while maintaining operational simplicity.
2Adaptability or versatility
If cast splitters with limited handle pivot range are used, then the device structure is simple, but the ability to widen the split is limited
Solution Approach 1:
The screw thread mechanism provides dynamic adjustability of the jaw separation distance. By rotating the handle, the screw thread advances the jaw incrementally, allowing the operator to widen the split as needed without being constrained by a fixed pivot range. This dynamic mechanism accommodates various cast sizes and materials while maintaining a relatively simple overall device structure.
Solution Approach 2:
The patent segments the force application into incremental steps through the screw thread mechanism. Instead of requiring a single large pivotal motion, the screw thread breaks down the jaw separation into small incremental advances with each rotation of the handle. This segmentation allows progressive widening of the split to accommodate different cast sizes while keeping the device structure simple.
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 effective splitting of orthopedic casts with reduced manual effort, allowing for easier removal and accommodating a range of cast sizes and materials.
Implementation Method 1
a screw thread configured to translate a handle rotation into a jaw translation
Data Source
AI summary
An orthopedic cast splitter apparatus for splitting an orthopedic cast may include a frame, a handle pivotally coupled to the frame, a drive rod configured to translate relative to the frame, and a jaws. The jaws may include a first plate coupled to the frame, and a second plate coupled to the drive rod and extending parallel to the first plate, with the second plate being configured to translate relative to the first plate. The jaws also may include a first tooth removably coupled to the first plate and extending beyond an end of the first plate, and a second tooth removably coupled to the second plate and extending beyond an end of the second plate, with the first tooth and the second tooth being configured to be inserted within a fissure formed in the orthopedic cast.