Counter Rotating Spinner Blade Clevis Hydrodynamic Design
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Solution Overview
Problem
Existing clevis designs for supporting spinner blades on filamentary supports do not effectively change the direction of rotation cyclically, which limits the attractant qualities and catch rates of fishing lures.
Innovation Solution
A clevis assembly with a 'H-shaped' or similar body piece that supports one or a pair of spinner blades, featuring a bored longitudinal core and laterally radiating cross arms, allowing for periodic counter-rotation by switching between clockwise and counter-clockwise directions as it moves through water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional clevis design is used to support spinner blades, then the structure is simple and easy to manufacture, but the rotation direction cannot be changed cyclically, limiting attractant qualities
Solution Approach 1:
The clevis structure incorporates dynamic elements that allow it to automatically change rotation direction during operation. The asymmetric configuration of cross arms and blade mounting positions enables the clevis to transition between clockwise and counter-clockwise rotation as it moves through water, transforming a static structure into a dynamically adaptable one.
Solution Approach 2:
The clevis employs asymmetric design in the arrangement of its cross arms and blade mounting positions. This asymmetry creates unequal hydrodynamic forces on different sides of the clevis during rotation, which naturally causes the rotation direction to reverse periodically. The asymmetric geometry is key to achieving cyclic direction changes without complex control mechanisms.
2Adaptability or versatility
If multiple clevises with multiple blades are mounted to a single lure support, then each blade rotates independently in a defined direction, but the attractant quality is limited compared to unified counter-rotation
Solution Approach 1:
The invention merges multiple blade elements into a single integrated clevis structure. Instead of using separate clevises for each blade, the design consolidates multiple blade mounting positions onto one clevis body with a unified rotational mechanism. This allows all blades to rotate together in unison while still achieving cyclic direction changes, reducing overall structural complexity.
Solution Approach 2:
The clevis is designed to produce periodic counter-rotation, automatically switching between clockwise and counter-clockwise rotation at regular intervals during its movement through water. This periodic action creates a varied and unpredictable movement pattern that enhances attractant quality by presenting different motion characteristics to fish over time.
3Productivity
If the clevis is designed to support blades that rotate continuously in one direction, then the structure is straightforward, but the novel movement presentation needed to enhance attractant qualities is not achieved
Solution Approach 1:
The clevis structure is designed to automatically change its own rotation direction without external control mechanisms. The asymmetric geometry and hydrodynamic forces acting on the clevis during movement through water naturally cause it to reverse rotation direction periodically. This self-service mechanism eliminates the need for complex actuators, sensors, or control systems while achieving the desired varied movement pattern.
Solution Approach 2:
The invention utilizes hydraulic principles by leveraging water flow and hydrodynamic forces to drive the cyclic rotation direction changes. As the clevis moves through water, the asymmetric arrangement of its components creates unequal drag and lift forces that naturally propel the clevis into counter-rotation. This hydraulic approach replaces mechanical control systems with fluid-dynamic actuation.
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
The cyclical rotation enhances the attractant qualities of fishing lures, increasing the number of fish caught by providing a novel movement presentation that disrupts water effectively.
Implementation Method 1
as the assembly is directed through a body of water... the direction of the rotation of the clevis and blades cyclically changes
Data Source
AI summary
A clevis body adapted to support one or a pair of spinner blades in combination on a filamentary support to produce a periodic cyclical counter rotation of the clevis and spinner blade assemblies when directed through water. A bore at a longitudinal core receives the filamentary support. At least one cross arm laterally radiates from the core and mounts to at least one spinner blade support arm that extends parallel to the core. One or a pair of spinner blades mounted to the longitudinal support arm(s) periodically and cyclically counter rotate the assembly about the filamentary support. The hydrodynamic movement of the clevis body and attached blades particularly induce the assembly to cyclically and periodically change back and forth between clockwise and counter-clockwise rotation directions.