Patent US4928972A successfully refreshed from Google Patents.
US4928972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron club head for golf
Assignee: Yamaha Corp
•
Filing: 1989-05-23
•
Granted: 1990-05-29
•
Expires: 2009-05-23
Abstract
Abstract A fiber reinforcement, which can be of solid or hollow construction, and a synthetic resin back up are disposed in a recess provided on the side of the club head remote from the shooting surface. A mass can be adjustably imbedded in the synthetic resin backup so as to increase the inertial moment of the club head. A rise member extending upwardly from the sole face of the club head can also be provided so that the center of gravity can be more easily adjusted. The fiber reinforcement is relatively thin for shorter shafted golf clubs having high degrees of loft, and increases progressively to a greater thickness for longer shafted golf clubs having relatively small degrees of loft. A back plate made of a woven cloth can be provided adjacent the fiber reinforcement to aid in reinforcing the shooting surface and to withstand the tension acting across the rear of the club head upon impact. The synthetic backup can be transparent or semi-transparent to expose the esthetics of the woven cloth. Bonding tape can be provided between the fiber reinforcement and the main body and between the fiber reinforcement and the back plate to facilitate the manufacture of the club head and to minimize the shock and vibration effect caused by striking a ball.
Inventors
- 👤 Tatsuo Nakanishi
- 👤 Toyohiko Tadokoro
- 👤 Masaki Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:59
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/047; A63B60/00; A63B2209/00; A63B2209/02; A63B2209/023; A63B60/54
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
An iron-type golf club head comprising, a main body member having a front side and a rear side, said main body member being made of a metal, said rear side including a recess, said front side including a wall section having an inner surface in communication with said recess and a shooting surface remote from said inner surface, a fiber reinforcement member disposed in said recess adjacent said inner surface of said wall section, a back plate disposed in said recess adjacent and generally coextensive in area with said fiber reinforcement member and remote from said inner surface of said wall section, and support means for fixing said fiber reinforcement member and said back plate in said recess, said fiber reinforcement member and said back plate establishing a reinforcement for said shooting surface when said golf club head strikes a ball.
Claim 2
Dependent Claim
141 words
An iron-type golf club head comprising, a main body member having a front side and a rear side, said main body member being made of a metal, said rear side including a recess, said front side including a wall section having an inner surface in communication with said recess and a shooting surface remote from said inner surface, a fiber reinforcement member disposed in said recess adjacent said inner surface of said wall section, a back plate disposed in said recess adjacent and generally coextensive in area with said fiber reinforcement member and remote from said inner surface of said wall section, and support means for fixing said fiber reinforcement member and said back plate in said recess, said fiber reinforcement member and said back plate establishing a reinforcement for said shooting surface when said golf club head strikes a ball.
Claim 3
Dependent Claim
36 words
The golf club head in claim 1, wherein said support means is made of a vibration damping material to minimize the shock and vibration felt by a player when said golf club head strikes a ball.
Claim 4
Dependent Claim
35 words
The golf club head in claim 1, wherein said support means is made of a resilient synthetic resin for minimizing the shock and vibration effect caused by striking a ball with said golf club head.
Claim 5
Dependent Claim
56 words
The golf club head in claim 1, wherein the thickness of said fiber reinforcement member from said front side to said rear side of said golf club head is relatively thin for shorter shafted golf clubs having a greater degree of loft, and becomes progressively thicker for longer shafted clubs having relatively small degrees of loft.
Claim 6
Dependent Claim
15 words
The golf club head in claim 1, wherein said back plate is a woven cloth.
Claim 7
Dependent Claim
16 words
The golf club head in claim 5, wherein said woven cloth is made of carbon fibers.
Claim 8
Dependent Claim
43 words
The golf club head in claim 6, wherein said main body member includes a toe portion and a heel portion, and the longitudinal direction of said carbon fibers of said woven cloth are substantially aligned from said, toe portion to said heel portion.
Claim 9
Dependent Claim
16 words
The golf club head in claim 5, wherein said woven cloth is made of aramide fibers.
Claim 10
Dependent Claim
43 words
The golf club head in claim 8, wherein said main body member includes a toe portion and a heel portion, and the longitudinal direction of said aramide fibers of said woven cloth are substantially aligned from said toe portion to said heel portion.
Claim 11
Dependent Claim
65 words
The golf club head in claim 1, wherein said rear side includes an upwardly extending rear upright remote from said wall section such that said reinforcement member, said back plate and said support means are disposed between said rear wall member and said wall section, said rear upright having a predetermined size so as to adjust the center of gravity of said golf club head.
Claim 12
Dependent Claim
26 words
The golf club head in claim 1 further comprising a first bonding tape between said fiber reinforcement member and said inner surface of said wall section.
Claim 13
Dependent Claim
22 words
The golf club head in claim 11, further comprising a second bonding tape between said fiber reinforcement member and said back plate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |