Golf club head
US6478693B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Feb 5, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B53/0458
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
In a golf club head with a loft angle in a range of from 5 to 30 degrees, the golf club head comprises a metal body having a hollow portion and having a face portion, a thick portion is formed on the back surface of the face portion, when counted from behind the face portion to the face portion side, the thick portion has N steps (N≧2) so that a centroid of a cut surface of the first step is distanced by 1 mm or more from a centroid of the face surface, and a centroid of a cut surface of the Nth step is distanced by 1 mm or more from a centroid of a cut surface of the N-1th step. Incidentally, the cut surface of each of the steps is defined by cutting provisionally the face portion at each of the steps in parallel to a plane touching with the face surface at a face center
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.