Patent US4535990A successfully refreshed from Google Patents.
US4535990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club head
Assignee: Globeride Inc
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Filing: 1983-11-17
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Granted: 1985-08-20
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Expires: 2003-11-17
Abstract
Abstract A golf club head is hollowed out to provide desired light weight characteristics. A tubular reinforcement material formed of plastic including reinforcement fibers, separate from the club head itself, is inserted into the cavity attached at the inner walls of the face and back, so as to span between them to prevent deformation of the head face and to hold the stiffness and mechanical strength required at its impact face.
Inventors
- 👤 Magoichi Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:49
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/045; A63B53/0466; A63B60/00; A63B2209/00; A63B2209/02; A63B53/0416; A63B53/0433
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A golf club head formed of fiber reinforced plastic in which there is a cavity surrounded with portal shaped walls formed by a face part, a top part and a back part of the head body and provided at the rear of the impact face, characterized by arranging a tubular reinforcement material formed of plastics including reinforcement fibers and disposed, abutting at its both ends on the inner walls of the face part and of the back part, so as to span between them; and a face plate made of fiber reinforced plastics and fixed at the front of the face part wall of the head body.
Claim 2
Dependent Claim
107 words
A golf club head formed of fiber reinforced plastic in which there is a cavity surrounded with portal shaped walls formed by a face part, a top part and a back part of the head body and provided at the rear of the impact face, characterized by arranging a tubular reinforcement material formed of plastics including reinforcement fibers and disposed, abutting at its both ends on the inner walls of the face part and of the back part, so as to span between them; and a face plate made of fiber reinforced plastics and fixed at the front of the face part wall of the head body.
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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |