US4451042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club head of carbon fiber reinforced plastic
Assignee: Mizuno Corp
•
Filing: 1983-04-07
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Granted: 1984-05-29
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Expires: 2003-04-07
Abstract
Abstract A golf club head comprises a shell of carbon fiber reinforced plastic having a core embedded in the shell, the side and bottom of the shell are covered with a metal sole member including its integral side and sole portions, the core is positioned and retained in said shell by inserting a projection or projections on the sole member into the core and a pocket is provided in the sole member for containing weights to be used for weight adjustment of the head or balance adjustment.
Inventors
- 👤 Keijiro Hayashi
- 👤 Toshimi Awano
- 👤 Masayuki Yoshikawa
- 👤 Kouzou Yazawa
- 👤 Takashi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:55
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0433; A63B53/0466; A63B60/00; A63B2209/00; A63B2209/02; A63B2209/023; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
A golf club head comprising a shell of carbon fiber reinforced plastic, a core embedded in the center portion of said shell to reduce the head weight, a metal sole member including integral side and sole portions so arranged as to cover the side and the bottom of said shell, respectively, projections on said metal sole member inserted into said core to position and retain it in said shell, and pocket means in said metal sole member for containing weights to be used for adjustment of the head or balance adjustment.
Claim 2
Dependent Claim
91 words
A golf club head comprising a shell of carbon fiber reinforced plastic, a core embedded in the center portion of said shell to reduce the head weight, a metal sole member including integral side and sole portions so arranged as to cover the side and the bottom of said shell, respectively, projections on said metal sole member inserted into said core to position and retain it in said shell, and pocket means in said metal sole member for containing weights to be used for adjustment of the head or balance adjustment.
Claim 3
Dependent Claim
28 words
A golf club head as claimed in claim 1 wherein said shell has an enforcement of synthetic resin impregnated carbon fiber fabric embedded in the neck portion thereof.
Claim 4
Dependent Claim
28 words
A golf club head as claimed in claim 2 wherein a tapered neck core with said reinforcement disposed therearound, in embedded in the neck portion of the head.
Claim 5
Dependent Claim
29 words
A golf club head as claimed in claim 1 wherein said projections are in the form of pins extending inwardly of the side portion of said metal sole member.
Claim 6
Dependent Claim
33 words
A golf club head as claimed in claim 1 wherein said projections are in the form of pins extending inwardly and upwardly of said side and sole portions of said sole member, respectively.
Claim 7
Dependent Claim
31 words
A golf club head as claimed in claim 1 wherein said projections are in the form of fins extending horizontally of said sole portion of said sole member adjacent said pocket.
Claim 8
Dependent Claim
35 words
A golf club head as claimed in claim 1 wherein said sole portion of said sole member is provided with a single projection in the form of a fin extending upwardly thereof adjacent said pocket.
Claim 9
Dependent Claim
30 words
A golf club head as claimed in claim 1 wherein said pocket means includes a threaded plug threadedly received in an opening thereof to confine said weights in said pocket.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
US4076254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |