Multi-layer Core Golf Ball with Hard Center and Soft Intermediate Layer

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Solution Overview

Problem

Existing golf ball technologies do not effectively fine-tune spin rate and compression while maintaining resilience, particularly in multi-layer core designs.

Innovation Solution

A golf ball design featuring a core with a center, intermediate core layer, and outer core layer, where the center is formed from an ionomeric composition, the intermediate layer from a rubber composition, and the outer core layer also from a rubber composition, with specific hardness and specific gravity ranges, and optionally a cover layer, to achieve optimal spin and resilience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a multi-layer core structure is used, then spin rate and compression can be tuned, but device complexity increases

Engineering Contradiction:

Improvespin rate tuningVSAvoidcore structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The core is divided into three distinct layers (center, intermediate, outer) with different material compositions and hardness values, allowing independent optimization of each layer's properties to achieve desired spin rate and compression characteristics

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each core layer is assigned specific local properties: the center has high hardness (80+ Shore C) for compression control, the intermediate layer has lower hardness for spin rate modulation, and the outer layer has high hardness for energy transfer, creating localized functional zones within the core

Inventive Principle:

Principle #3Local quality

2Strength

If the center hardness is increased, then compression is improved, but resilience may be reduced

Engineering Contradiction:

ImprovecompressionVSAvoidresilience

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent optimizes the hardness parameter of the center layer to be 80+ Shore C, which provides sufficient compression control while the intermediate layer's softer composition compensates to maintain overall ball resilience through parameter balancing across layers

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS8834300B2Multi-layer core golf ball

Publication Date: 2014.09.16 ACUSHNET CO

AI summary

Golf balls consisting of a multi-layer core and a cover are disclosed. The multi-layer core consists of a small, hard center enclosed by a soft intermediate core layer and an outer core layer.