Monolithic ceramic golf club putter head and method of manufacture thereof
US5340107A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1993 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Mar 19, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S273/23
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A golf club putter head made of a wear resistant and highly polished, aesthetically pleasing silicon nitride material in a manufacturing process which obviates labor intensive machining and finishing. Except for the optional addition of high density material weights at the toe and heel portions of the putter head, the present invention provides a putter head which is made of a monolithic silicon nitride ceramic which has a relatively low density of 3.3 grams per cubic centimeter and which is provided with a polished surface appearance along most of its surfaces. The present invention is preferably fabricated using a process of which the most important step is a high pressure, dry pressing step in which the unique shape of the golf club head described herein facilitates bi-axial symmetric pressure application resulting in what is known as a green part. The part may be readily completed with the steps of binder removal, nitriding and hot isostatic pressure sintering to densify and shrink the material and finishing with sandblasting and diamond lapping to provide the aesthetically pleasing highly reflective polished surface. The invention may also be fabricated using slip casting or i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.