Golf club face with roughness characteristics for more consistent performance in wet and dry conditions
AssigneeKarsten Manufacturing Corporation
InventorsDaniel Ura Hernandez, Erik M. Henrikson
Life of this patent
Estimating the term…
Abstract
A wedge-type golf club head comprises unique surface roughness structures that improve spin in wet conditions by providing a system of peaks and valleys that grip the ball and relocate water from the hitting surface. The hitting surface can be characterized by statistical measurements such as average surface roughness (Sa), skewness (Ssk), root mean square gradient (Sdq), and developed interface area (Sdr) at different wavelengths including a composite band, a milling band, and a surface band. The surface roughness structure provides increased spin retention in wet conditions, while remaining durable.
Claims20
A wedge-type golf club head comprising:
- a strike face having a strike face surface;
- the strike face surface further comprising a surface roughness characterized by:
- a surface band evaluated over an entirety of the strike face surface, at a surface band surface roughness wavelength range of 300 μin to 2,000 μin;
- wherein an Ssk of the surface band is between −1.2 and −1.8.
A wedge-type golf club head comprising:
- a strike face having a strike face surface;
- the strike face surface further comprising a surface roughness characterized by a composite band and a surface band:
- the composite band is evaluated over an entirety of the strike face surface, at a composite band surface roughness wavelength range of 300 μin to 100,000 μin
- wherein an Ssk of the composite band is between 0 and 0.5;
- the surface band is evaluated over the entirety of the strike face surface, at a surface band surface roughness wavelength range of 300 μin to 2,000 μin;
- wherein the Ssk of the surface band is between −5.0 and −1.0.
A wedge-type golf club head comprising:
- a strike face having a strike face surface;
- the strike face surface further comprising a surface roughness characterized by a composite band, a milling band, and a surface band:
- the composite band is evaluated over an entirety of the strike face surface, at a composite band surface roughness wavelength range of 300 μin to 100,000 μin;
- wherein an Ssk of the strike face surface in the composite band is between 0 and 0.5;
- the milling band is evaluated over the entirety of the strike face surface, at a milling band surface roughness wavelength range of 2,000 μin to 100,000 μin;
- wherein the Ssk of the strike face surface in the milling band is between 0.2 and 0.7;
- the surface band is evaluated over the entirety of the strike face surface, at a surface band surface roughness wavelength range of 300 μin to 2,000 μin;
- wherein the Ssk of the strike face surface in the surface band is between −5.0 and −1.0.
Dependencies are inferred from the claim text.