Adjustable Putter Shaft Stiffener for Custom Length and Weight
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Solution Overview
Problem
Existing golf clubs lack adjustable length and mass options that do not significantly impact the total weight, swing weight, or aesthetics, making it difficult for golfers to customize their clubs without incurring additional costs or modifying the club's weight and stiffness.
Innovation Solution
A golf club design featuring an adjustable length shaft assembly with a threaded screw mechanism and an adjustable mass assembly that allows for axial movement of a weighted mass within the shaft, enabling customizable club length and weight distribution without altering the overall weight or aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the shaft length is adjusted by cutting or adding extensions, then the club length can be customized, but the total weight, swing weight, and shaft stiffness are adversely modified
Solution Approach 1:
The shaft is divided into multiple segments (first shaft portion, second shaft portion, third shaft portion) that can slide relative to each other. This segmentation allows independent adjustment of length without affecting the overall weight distribution, as each segment can be repositioned without adding or removing material.
Solution Approach 2:
The shaft assembly transitions from a static, fixed-length structure to a dynamic, adjustable-length structure. The sliding mechanism with locking features enables the shaft to change length while maintaining structural integrity and consistent weight characteristics through the redistribution of existing shaft segments.
2Length of moving object
If the shaft length is adjusted by cutting or adding extensions, then the club length can be customized, but the swing weight is adversely modified
Solution Approach 1:
The shaft is divided into multiple segments (first shaft portion, second shaft portion, third shaft portion) that can slide relative to each other. This segmentation allows independent adjustment of length without affecting the overall weight distribution, as each segment can be repositioned without adding or removing material.
Solution Approach 2:
The invention changes the physical parameters of the shaft system by introducing sliding interfaces and locking mechanisms that allow length adjustment while maintaining consistent mass distribution. The adjustable mass assembly further enables fine-tuning of swing weight by repositioning weight elements within the shaft structure.
3Length of moving object
If the shaft length is adjusted by cutting or adding extensions, then the club length can be customized, but the shaft stiffness is adversely modified
Solution Approach 1:
The shaft is divided into multiple segments (first shaft portion, second shaft portion, third shaft portion) that can slide relative to each other. This segmentation allows independent adjustment of length without affecting the overall weight distribution, as each segment can be repositioned without adding or removing material.
Solution Approach 2:
The shaft segments are pre-configured with locking features and alignment mechanisms that ensure proper engagement and maintain structural integrity during adjustment. The locking features prevent unintended movement and ensure that the shaft maintains its designed stiffness characteristics at any selected length.
4Length of moving object
If a new shaft is purchased to adjust length, then the club length can be customized, but additional cost is incurred
Solution Approach 1:
The shaft assembly transitions from a static, fixed-length structure to a dynamic, adjustable-length structure. The sliding mechanism with locking features enables the shaft to change length while maintaining structural integrity and consistent weight characteristics through the redistribution of existing shaft segments.
Solution Approach 2:
The shaft assembly is designed as a universal, multi-functional component that can serve multiple length requirements. The adjustable mechanism allows a single shaft assembly to replace what would traditionally require multiple different-length shafts, providing both length customization and cost savings.
5Length of moving object
If the grip is removed and shaft end is modified to adjust length, then the club length can be customized, but additional expense and time are incurred
Solution Approach 1:
The shaft assembly transitions from a static, fixed-length structure to a dynamic, adjustable-length structure. The sliding mechanism with locking features enables the shaft to change length while maintaining structural integrity and consistent weight characteristics through the redistribution of existing shaft segments.
Solution Approach 2:
The shaft assembly is designed to be self-adjusting through its sliding and locking mechanism, eliminating the need for external modifications such as cutting or gripping removal. The user can independently adjust the length by operating the locking features without requiring professional service or additional tools.
Data Source
AI summary
A golf club has a first shaft coupled to a club head, a second shaft configured to slidably engage a portion of the first shaft, a grip coupled to the second shaft, and an adjustable length shaft assembly received by the second shaft and configured to allow a portion of the first shaft to slide in relation to the second shaft in a first configuration, and to restrict a portion of the first shaft from sliding in relation to the second shaft in a second configuration. The grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.