US4449707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club head of carbon fiber reinforced plastic
Assignee: Mizuno Corp
•
Filing: 1983-05-20
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Granted: 1984-05-22
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Expires: 2003-05-20
Abstract
Abstract A golf club head comprises a shell of carbon fiber reinforced plastic having a core and a reinforcement of carbon fiber fabric 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
2026-10-29 20:52
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0433; A63B53/0466; A63B60/00; A63B2209/00; A63B2209/02; A63B2209/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 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 reinforcement of carbon fiber fabric surrounding the core and extending into the neck portion of the head to strengthen the head and the neck portion, a metal sole member including integral side and sole portions so arranged as to cover the side and the bottom of said shell, respectively, at least one projection of 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
120 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 reinforcement of carbon fiber fabric surrounding the core and extending into the neck portion of the head to strengthen the head and the neck portion, a metal sole member including integral side and sole portions so arranged as to cover the side and the bottom of said shell, respectively, at least one projection of 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 a tapered neck core with said reinforcement disposed therearound, is embedded in the neck portion of the head.
Claim 4
Dependent Claim
38 words
A golf club head as claimed in claim 1 wherein said reinforcement comprises separate elements covering the head core and the neck core and having overlapped ends at a junction of the neck portion to the head body.
Claim 5
Dependent Claim
37 words
A golf club head as claimed in claim 1 wherein said reinforcement comprises an integral element extending the head body to the neck portion and spaces between the head core and the reinforcement is filled with filler.
References Cited (Backward Citations)
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Cited
US1638916A
Cited
US3266805A
Cited
US3692306A
Cited
US3843122A
Cited
JPS509074A
Cited
US4076254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |