US5217227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a golf club head using a ceramic mold and the article produced thereby
Assignee: Individual
•
Filing: 1991-12-06
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Granted: 1993-06-08
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Expires: 2011-12-06
Abstract
Abstract A method of making a golf club head and golf club heads produced by the method which involves filling a ceramic mold in the shape of a golf club head with metal powders, the mold optionally containing inserts made from a material selected from the group consisting of metal powders, castings, wrought metal, and green compacts of metal powders and combinations thereof optionally sintering the material in the mold, compressing the material in the mold and the material contained therein by a process of hot isostatic pressure or a pseudo-isostatic pressure utilizing granular material around the mold to form near 100 percent of the theoretical density of the contents of the mold and thereafter removing the material from the mold.
Inventors
- 👤 Chester S. Shira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:42
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0416; A63B60/00; A63B60/02; B; B22; B22F; B22F5/00; A63B2209/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A unitary golf club head having a substantially exposed and essentially metallic toe, sole, face, and heel and made from the group consisting of metal powders and green compacts of metal powders and a material selected from the group consisting of castings and wrought metal and combinations thereof, and characterized by the density of the material in said golf club head being nearly 100% of the theoretical density of said material in said golf club head when said material is in solid form.
Claim 2
Dependent Claim
83 words
A unitary golf club head having a substantially exposed and essentially metallic toe, sole, face, and heel and made from the group consisting of metal powders and green compacts of metal powders and a material selected from the group consisting of castings and wrought metal and combinations thereof, and characterized by the density of the material in said golf club head being nearly 100% of the theoretical density of said material in said golf club head when said material is in solid form.
Claim 3
Dependent Claim
36 words
The golf club head of claim 1 wherein said toe, sole, and heel of said club head are made of a heavy alloy and the remainder of said club head is made of a lighter alloy.
Claim 4
Dependent Claim
34 words
The golf club head of claim 1 wherein the face of said club head is made of a wear resistant alloy and the remainder of said club head is made of a different alloy.
Claim 5
Dependent Claim
37 words
The golf club head of claim 1 wherein the toe, sole, and heel of said club head are made from a heavy alloy and the face of said club head is made from a wear resistant material.
Claim 6
Dependent Claim
46 words
The golf club head of claim 1 wherein the toe and sole areas contain a sufficient amount of a heavy alloy so as to move the center of gravity of the club head to the center of the most frequent impact point of the club head.
Claim 7
Dependent Claim
42 words
The golf club head of claim 1 wherein the toe, sole, and heel of said club head are made from a heavy alloy and the face of said club head is made of a material having a hardness having desirable sonic characteristics.
Claim 8
Dependent Claim
15 words
The golf club head of claim 2 wherein said heavy alloy is a tungsten-rich alloy.
Claim 9
Dependent Claim
15 words
The golf club head of claim 4 wherein said heavy alloy is a tungsten-rich alloy.
Claim 10
Dependent Claim
15 words
The golf club head of claim 5 wherein said heavy alloy is a tungsten-rich alloy.
Claim 11
Dependent Claim
15 words
The golf club head of claim 6 wherein said heavy alloy is a tungsten-rich alloy.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |