Golf Club Head CG Optimization via Local Weighting

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Solution Overview

Problem

Golf club heads face challenges in balancing features such as face height and center of gravity, where increasing face size for a larger impact area can adversely affect launch angle and backspin, requiring a balanced design to optimize performance characteristics.

Innovation Solution

The golf club head design incorporates specific optimization characteristics, including a face height between 33 mm to 71 mm, a CG depth between 40.64 mm and 102 mm, and a CG performance ratio, to balance face size with center of gravity location, ensuring optimal energy transfer and forgiveness while maintaining launch angle and backspin.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of moving object

If the face size of the golf club head is expanded to provide a greater impact area, then the forgiveness and energy transfer are improved, but the center of gravity location is adversely altered, affecting launch angle and backspin

Engineering Contradiction:

Improveimpact areaVSAvoidcenter of gravity location

Core Design Contradiction:

Area of moving objectVSStability of the object's composition

Solution Approach 1:

The patent applies local quality by strategically distributing weight within specific regions of the club head. Weighting elements are positioned in the rear and sole portions of the head body, creating localized mass concentrations that influence the center of gravity position independently of the overall face size expansion. This allows the face to be large for forgiveness while maintaining stable CG location through targeted local weight placement.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent utilizes parameter changes by adjusting the mass distribution parameters within the club head. By varying the weight, position, and configuration of weighting elements, the design optimizes the relationship between face size and center of gravity location. The weighting elements can be positioned at different depths and locations to fine-tune the CG parameters while maintaining the expanded face geometry for improved impact area.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If the face height is increased to improve impact area, then energy transfer is enhanced, but the center of gravity position shifts, adversely affecting launch angle and backspin characteristics

Engineering Contradiction:

Improveenergy transferVSAvoidcenter of gravity position

Core Design Contradiction:

Use of energy by moving objectVSStability of the object's composition

Solution Approach 1:

The patent applies the counterweight principle by positioning weighting elements in the rear portion of the club head, opposite to the expanded face area. These weighting elements act as counterbalancing masses that offset the tendency of the enlarged face height to shift the center of gravity forward. By strategically placing mass in the rear and sole regions, the design maintains stable CG position while allowing the face height to be increased for improved energy transfer and impact area.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

Data Source

PatentUS10080933B2Golf club heads with optimized characteristics and related methods

Publication Date: 2018.09.25 KARSTEN MFG CORP

AI summary

Embodiments of golf club heads comprising a head interior and a hosel structure, the head interior bounded by a head front portion, a head rear portion, a head heel portion, a head toe portion, a head top portion, and a head sole portion, the golf club heads further comprising various optimized characteristics, including optimizing the head center of gravity height and depth in relation to the head volume and mass, are presented herein. Other examples and related methods are also disclosed herein.