US4798383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club head
Assignee: Yamaha Corp
•
Filing: 1986-01-21
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Granted: 1989-01-17
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Expires: 2006-01-21
Abstract
Abstract An improved golf club head includes a metallic main body 1 having a face side section 2 providing a face side surface for shooting balls. A rearwardly opening gouge 3 is formed within the main body, extending to an end wall 3a provided by the face side section. An FRP plate 4 is inserted into the gouge and attached to the end wall. Presence of the light FRP plate in the face side region allows free weight assignment to other regions for ideal inertia moment adjustment and produces locally laminated face side construction in which thickness ratio of components can be adjusted for better feel at shooting.
Inventors
- 👤 Yoichi Nagasaki
- 👤 Itsushi Nagamoto
- 👤 Toyohiko Tadokoro
- 👤 Masaki Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:48
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0416; A63B53/042; A63B53/0425; A63B53/047; A63B60/00; A63B2209/00; A63B2209/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
174 words
An improved golf club head comprising: a main body constructed of metal and having a face side section of substantially uniform thickness and providing a planar face side surface for striking golf balls, said main body having a rear opening extending therein towards said face side surface between upper and lower edges of said body to an end wall provided by a rear side surface of said face side section, a fiber reinforced plastic plate of substantially uniform thickness in the range of 5.0 mm or less fixed to said end wall parallel to said face side surface, the upper and lower edges of said body forming said opening extending beyond the thickness of said fiber reinforced plastic plate, said fiber reinforced plastic plate being formed as a solid planar body having uniform density throughout, the density of said fiber reinforced plastic plate being such that it provides a lighter mass than would otherwise be present if said fiber reinforced plastic plate were made of the same material as that of said main body.
Claim 2
Dependent Claim
174 words
An improved golf club head comprising: a main body constructed of metal and having a face side section of substantially uniform thickness and providing a planar face side surface for striking golf balls, said main body having a rear opening extending therein towards said face side surface between upper and lower edges of said body to an end wall provided by a rear side surface of said face side section, a fiber reinforced plastic plate of substantially uniform thickness in the range of 5.0 mm or less fixed to said end wall parallel to said face side surface, the upper and lower edges of said body forming said opening extending beyond the thickness of said fiber reinforced plastic plate, said fiber reinforced plastic plate being formed as a solid planar body having uniform density throughout, the density of said fiber reinforced plastic plate being such that it provides a lighter mass than would otherwise be present if said fiber reinforced plastic plate were made of the same material as that of said main body.
Claim 3
Dependent Claim
28 words
An improved golf club head as claimed in claim 1 in which said face side section has a uniform thickness in a range from 0.5 to 3.0 mm.
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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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |