Twisted Golf Club Face Contours Counteract Gear Effect
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Golf club heads currently face challenges in accurately striking a golf ball due to the 'gear effect,' where off-center impacts result in unintended ball flight paths, leading to left or right tendencies based on the impact location on the club face, necessitating compensation through bulge and roll properties.
Innovation Solution
A golf club head design featuring a twisted striking face with varying loft and face angle contours across different quadrants, including toe, heel, crown, and sole areas, to counteract the gear effect by adjusting the face angle and loft at specific points, thereby improving accuracy and reducing spin-related deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the club face has constant bulge and roll properties, then the club head structure is simple and easy to manufacture, but off-center impacts cause gear effect leading to inaccurate ball flight
Solution Approach 1:
The club head implements variable bulge and roll properties in different regions of the club face. Specifically, the bulge radius varies from a first value at the apex to a second value at the equator, and the roll radius varies from a third value at the apex to a fourth value at the equator. This local differentiation allows each region to compensate for gear effect appropriately, improving ball flight accuracy without requiring complete structural redesign.
Solution Approach 2:
The invention changes the geometric parameters of the club face by varying the bulge and roll radii across different locations. The bulge radius transitions from a first value to a second value, and the roll radius transitions from a third value to a fourth value, creating optimized curvature profiles that reduce spin-induced deviations while maintaining manufacturability through controlled parameter variation.
2Manufacturing precision
If the club face has variable bulge and roll properties to counteract gear effect, then ball flight accuracy improves, but the design and manufacturing complexity increases
Solution Approach 1:
The club head implements variable bulge and roll properties in different regions of the club face. Specifically, the bulge radius varies from a first value at the apex to a second value at the equator, and the roll radius varies from a third value at the apex to a fourth value at the equator. This local differentiation allows each region to compensate for gear effect appropriately, improving ball flight accuracy without requiring complete structural redesign.
Solution Approach 2:
The invention utilizes spherical geometry principles by defining the club face with varying radii of curvature. The face is characterized by a bulge radius and roll radius that vary along the apex-equator-apex meridian, creating a controlled curved surface that optimizes ball contact while maintaining manufacturability through geometric progression rather than arbitrary complex shapes.
Data Source
AI summary
A golf club head is described having a club head portion, a shaft portion connected to the club head portion, and a grip portion connected to the shaft portion. The club head portion has a heel portion, a sole portion, a toe portion, a crown portion, a hosel portion, and a striking face. The striking face has a center face roll contour, a toe side roll contour, a heel side roll contour, a center face bulge contour, a crown side bulge contour, and a sole side bulge contour. The toe side roll contour is more lofted than the center face roll contour. The heel side roll contour is less lofted than the center face roll contour. The crown side bulge contour is more open than the center face bulge contour, and the sole side bulge contour is more closed than the center face bulge contour.