US4740345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing an iron golf club head
Assignee: Yamaha Corp
•
Filing: 1986-10-20
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Granted: 1988-04-26
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Expires: 2006-10-20
Abstract
Abstract In production of a composite type iron golf club head having a FRP (fiber reinforced plastic) backing in a rear recess, a peripheral flange to be caught by the main body is formed on the FRP backing by providing a bottom peripheral groove in the rear recess for fortified bonding of the FRP backing to the main body.
Inventors
- 👤 Yoichi Nagasaki
- 👤 Toyohiko Tadokoro
- 👤 Tatsuo Nakanishi
- 👤 Masaki Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:49
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/047; A63B60/00; B; B29; B29C; B29C70/00; B29C70/68; B29C70/74; B29C70/745; A63B2209/00; A63B2209/02; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0854; B29K2105/12; B29L; B29L2031/00; B29L2031/52; B29L2031/5227; Y; Y10; Y10S; Y10S273/00; Y10S273/07; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982; Y10T29/49986
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
Method for producing an iron golf club head comprising the steps of forming a metallic main body having a rear recess in the surface opposite to the face side of said metallic main body and a peripheral groove surrounding the bottom of said rear recess, filling easily deformable crude resin containing reinforcing fiberous material into said recess and peripheral groove, and hardening said crude resin by application of heat under pressure.
Claim 2
Dependent Claim
71 words
Method for producing an iron golf club head comprising the steps of forming a metallic main body having a rear recess in the surface opposite to the face side of said metallic main body and a peripheral groove surrounding the bottom of said rear recess, filling easily deformable crude resin containing reinforcing fiberous material into said recess and peripheral groove, and hardening said crude resin by application of heat under pressure.
Claim 3
Dependent Claim
22 words
Method as claimed in claim 1 in which said step of filling includes filling fluid FRP into said recess and peripheral groove.
Claim 4
Dependent Claim
35 words
Method as claimed in claim 1 in which said step of filling includes placing said reinforcing fibrous material in said recess and peripheral groove, and impregnating said reinforcing fibrous material with solution of crude resin.
Claim 5
Dependent Claim
24 words
Method as claimed in claim 1 in which said step of forming includes roughening the inner wall of said recess including said peripheral groove.
Claim 6
Dependent Claim
22 words
Method as claimed in claim 1 in which said step of forming includes forming projections on the inner wall of said recess.
Claim 7
Dependent Claim
22 words
Method as claimed in claim 1 in which said step of forming includes forming ribs on the inner wall of said recess.
Claim 8
Dependent Claim
24 words
Method as claimed in claim 1 in which said step of forming includes forming projections and ribs on the inner wall of said recess.
References Cited (Backward Citations)
SU294750A1
Cited
US3047934A
Cited
GB1229904A
Cited
US3855029A
Cited
US4027885A
Cited
US4031601A
Cited
US4067950A
Cited
US4248817A
Cited
JPS5438376A
Cited
US4271112A
Cited
US4497765A
Cited
US4260576A
Cited
US4356617A
Cited
JPS5829620A
Cited
GB2115295A
Cited
US4451041A
Cited
US4581190A
Cited
US4449707A
Cited
JPS59109315A
Cited
US4555115A
Cited
US4591155A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |