Golf club with optimum moments of inertia in the vertical and hosel axes
US8267808B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2009 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Jan 15, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2209/023
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A hollow golf club is provided having an outer shell and an inner frame. The outer shell comprises one or more lightweight members, such as the crown or the skirt, and preferably fits within an envelope of about 5 inches×5 inches×2.8 inches. The inner frame fits within a smaller envelope and sits on the sole of the club head. One or more weights are located either on or within the inner frame to optimize the moment of inertia of the club head about both the vertical axis running through the center of gravity or geometric center of the club head, hereinafter referred to as the “y-axis,” and the axis running through the center of the shaft of the golf club, hereinafter referred to as the “hosel axis.” The weights can be attached to the inner frame or can be distributed within the inner frame. In another embodiment, the hitting face and a portion of the skirt proximate the toe form a curved blade in the shape of a sickle or battle ax and an inner support bridges the toe end of the curved blade to the hosel for structural support. The ratio of moment of inertia of the club head about the y-axis to moment of inertia of the club head about the hosel axis is preferably 0.55. More preferab…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.