US4438931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club head
Assignee: Endo Manufacturing Co Ltd
•
Filing: 1982-09-16
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Granted: 1984-03-27
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Expires: 2002-09-16
Abstract
Abstract A golf club head comprising two or more thin shell sections, for instance a front shell section and a rear shell section, or a face shell section, a top shell section and a body shell section including a bottom section and a side section, are secured together along their edges to form a one-piece shell having a sealed space. A shaft is also secured together with the shell sections when securing these sections. The sealed space is filled with a filler material such as foamed urethane and rubber.
Inventors
- 👤 Tetsuo Motomiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:29
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0466; A63B60/00; A63B53/0416; A63B53/045; A63B53/0454
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
A golf club head comprising two or more sheet-like shell sections secured together edgewise to form a one-piece sealed hollow shell structure having a shaft mounting section and a bottom section, and a shaft, the lower end of which is fastened both to said shaft mounting section and to said bottom section.
Claim 2
Dependent Claim
52 words
A golf club head comprising two or more sheet-like shell sections secured together edgewise to form a one-piece sealed hollow shell structure having a shaft mounting section and a bottom section, and a shaft, the lower end of which is fastened both to said shaft mounting section and to said bottom section.
Claim 3
Dependent Claim
25 words
A golf club head according to claim 1, wherein said two or more shell sections are a front shell section and a rear shell section.
Claim 4
Dependent Claim
43 words
A golf club head according to claim 1, wherein said two or more shell sections are a face shell section, a top shell section and a body shell section, said body shell section including a bottom shell section and a side shell section.
Claim 5
Dependent Claim
24 words
A golf club head accordiing to claim 3, further comprising an L-shaped reinforcing piece between said face shell section and said bottom shell section.
Claim 6
Dependent Claim
17 words
A golf club head according to claim 1, wherein said shell sections are made of a metal.
Claim 7
Dependent Claim
16 words
A golf club head according to claim 1, wherein said shell structure contains a filler material.
Claim 8
Dependent Claim
15 words
A golf club head according to claim 6, wherein said filler material is foamed urethane.
Claim 9
Dependent Claim
14 words
A golf club head according to claim 6, wherein said filler material is rubber.
Claim 10
Dependent Claim
17 words
A golf club head according to claim 1, wherein said shell sections are made of stainless steel.
Claim 11
Dependent Claim
33 words
A golf club head according to claim 1, further comprising a pipe extending between said shaft mounting section and said bottom section, the lower end of said shaft being inserted into said pipe.
References Cited (Backward Citations)
US1968092A
Cited
US4313607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |