Progressive Center of Gravity Golf Iron Set Design
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Solution Overview
Problem
Conventional sets of golf irons lack a progressive center of gravity distribution, leading to inconsistent ball flight trajectories and distances, as the center of gravity position remains constant across different loft angles, affecting the launch angle and distance of the golf ball.
Innovation Solution
A set of golf clubs with long, mid, and short irons featuring a progressive center of gravity allocation, where the center of gravity is positioned differently across each type, with long irons having a center of gravity between 0 mm and 2.5 mm from the face center, mid-irons between 0 mm and 2.5 mm, and short irons between 3 mm and 4 mm, along with strategically placed weight members to optimize moment of inertia and loft angle-specific designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the center of gravity position is kept constant across all irons in a set, then manufacturing is simpler and design is more consistent, but ball flight trajectories become inconsistent and distance control deteriorates
Solution Approach 1:
The patent applies local quality by positioning the center of gravity at different locations for different iron types within the same set. Long irons (15-25 degrees loft) have the center of gravity positioned 0-2.5mm from the face center, while short irons (37-47 degrees loft) have it positioned 3-4mm from the face center. This localized differentiation optimizes ball flight characteristics for each club type while maintaining overall set performance.
Solution Approach 2:
The patent implements parameter changes by systematically varying the center of gravity position parameter across the iron set based on loft angle. As loft angle increases from long to short irons, the horizontal distance of the center of gravity from the face center increases progressively. This parameter progression ensures consistent ball flight trajectories and improved distance control throughout the set.
2Manufacturing precision
If the center of gravity is positioned closer to the face center for all irons, then launch angle control is improved, but moment of inertia decreases and shot stability worsens
Solution Approach 1:
The patent applies local quality by optimizing the center of gravity position for each iron type's specific performance requirements. Long irons use a center of gravity position of 0-2.5mm from the face center to achieve lower launch angles, while short irons use 3-4mm to maintain stability during higher lofted shots. Each location is locally optimized for its specific club type.
Solution Approach 2:
The patent implements dynamics by creating a progressive system where the center of gravity position dynamically adapts to different loft angles. The horizontal distance from the face center increases as loft angle increases, creating a dynamic relationship between club geometry and mass distribution that optimizes performance across the entire set.
3Reliability
If weight members are added to adjust center of gravity position, then ball flight consistency is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies local quality by strategically placing weight members in specific regions of the club head to achieve the desired center of gravity position for each iron type. Weight members are positioned in the hosel or sole regions, spaced at least 75% of the blade length from each other, with weight center of gravities below the iron's center of gravity. This localized weighting achieves performance goals without excessive complexity.
Data Source
AI summary
The present invention is direct to a set of golf clubs comprising long irons, mid-irons and short irons. The long irons have a first center of gravity positioned horizontally from the face center toward the hosel by a first distance. The mid-irons have a second center of gravity positioned horizontally from the face center toward the hosel by a second distance. The short irons have a third center of gravity positioned horizontally from the face center toward the hosel by a third distance that is greater than the first and second distances.