Golf club head with varying face grooves
US7905797B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2008 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Sep 23, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B53/0466
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention is directed to a golf club head with an improved striking surface. Grooves are machined into the strike surface with tight tolerances. The grooves have sharp edges, radiused ends, and a draft angle between about 2° and 12°. The striking face is machined such that it has a uniform texture with a roughness of more than 40 Ra. The grooves may contain a plurality of portions, including a radiused or angled portion, a portion having substantially parallel walls, a portion having a v-shape, and a curved portion. The grooves may also be characterized by various dimensions, including draft angle, inclusive side wall angle, width, depth, cross-sectional area, spacing, and pitch ratio. Preferred values for these dimensions are provided. A golf club head having a variety of groove types and a set of golf clubs with grooves varying among the individual clubs of the set are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.