Patent US5042805A successfully refreshed from Google Patents.
US5042805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sports implements with a long handle or portion
Assignee: Nisso Ltd
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Filing: 1990-01-03
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Granted: 1991-08-27
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Expires: 2010-01-03
Abstract
Abstract A golf club includes a grip, shaft, and head. Within the shaft is disposed a spiral groove in which is disposed a coiled spring formed of a shape-memorizing alloy. Epoxy resin fills the groove and overlies the spring. The spring increases the strength of the shaft.
Inventors
- 👤 Yoshinaga Nakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
A; A63; A63B; A63B60/00; A63B53/00; A01; A01K; A01K87/00; A01K87/08; A63B59/00; A63B60/52; A63C; A63C5/00; A63C5/06; A63C5/07; A63B21/00; A63B21/40; A63B21/4001; A63B21/4017; A63B2102/00; A63B2102/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
48 words
In a golf club comprising a grip, a shaft and a head, the improvement comprising a spiral groove formed in said shaft and a coiled spring, formed of a shape-memorizing alloy, disposed in said groove, said groove being filled with an epoxy resin which overlies said coiled spring.
Claim 2
Dependent Claim
48 words
In a golf club comprising a grip, a shaft and a head, the improvement comprising a spiral groove formed in said shaft and a coiled spring, formed of a shape-memorizing alloy, disposed in said groove, said groove being filled with an epoxy resin which overlies said coiled spring.
Claim 3
Dependent Claim
25 words
The golf club of claim 1, wherein said groove has a depth of approximately 0.2 to 0.3 mm. and a width of approximately 0.4 mm.
Claim 4
Dependent Claim
19 words
The golf club of claim 1, wherein said groove forms a right-hand spiral from said grip to said head.
Claim 5
Dependent Claim
23 words
The golf club of claim 1, wherein said coiled spring is wound in said groove at a temperature of approximately 350-400 degrees C.
References Cited (Backward Citations)
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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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |