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US5033749A
Expired / Lapsed
US
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Thread-wound golf ball
Assignee: Bridgestone Sports Co Ltd
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Filing: 1990-03-20
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Granted: 1991-07-23
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Expires: 2010-03-20
Abstract
Abstract A thread-wound golf ball comprising; a liquid center having a diameter in the range of 26 to 30 mm and having a hollow spherical center backing with a liquid contained therein, a thread rubber layer, and a cover thereon, said center backing being formed of a rubber material selected from the group consisting of natural rubber and blends of natural rubber having a JIS A hardness of 44 to 58 and a thickness of 1.7 to 2.3 mm, said liquid having a specific gravity of 1.01 to 2.5, and said liquid center exhibiting a deflection of 10 mm under a load of 1 to 2 kg and a deflection of 15 mm under a load of 3 to 6.5 kg.
Inventors
- 👤 Shinichi Kakiuchi
- 👤 Seisuke Tomita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:50
CPC Classifications
A; A63; A63B; A63B37/00; A63B37/02; A63B37/08; A63B37/0003; A63B37/0004; A63B37/00215; A63B37/0038; A63B37/004; A63B37/0043; A63B37/0045; A63B37/005; A63B37/0051; A63B37/0052; A63B37/007; A63B37/0072; A63B37/0076; A63B37/0077; A63B37/0084; A63B2037/085; A63B37/0016; A63B37/0017; A63B37/0018; A63B37/0083
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A thread-wound golf ball comprising; a liquid center having a diameter in the range of 26 to 30 mm and having a hollow spherical center backing with a liquid contained therein, a thread rubber layer, and a cover thereon, said center backing being formed of a rubber material selected from the group consisting of natural rubber, and blends of natural rubber and having a JIS A hardness of 44 to 58 and a thickness of 1.7 to 2.3 mm, said liquid having a specific gravity of 1.0 to 2.5, and said liquid center exhibiting a deflection of 10 mm under a load of 1 to 2 kg and a deflection of 15 mm under a load of 3 to 6.5 kg.
Claim 2
Dependent Claim
121 words
A thread-wound golf ball comprising; a liquid center having a diameter in the range of 26 to 30 mm and having a hollow spherical center backing with a liquid contained therein, a thread rubber layer, and a cover thereon, said center backing being formed of a rubber material selected from the group consisting of natural rubber, and blends of natural rubber and having a JIS A hardness of 44 to 58 and a thickness of 1.7 to 2.3 mm, said liquid having a specific gravity of 1.0 to 2.5, and said liquid center exhibiting a deflection of 10 mm under a load of 1 to 2 kg and a deflection of 15 mm under a load of 3 to 6.5 kg.
Claim 3
Dependent Claim
17 words
The thread-wound golf ball of claim 1 wherein said liquid comprises water having a specific gravity modifier.
Claim 4
Dependent Claim
16 words
The thread-wound golf ball of claim 2 wherein said specific gravity modifier comprises BaSO 4 .
Claim 5
Dependent Claim
16 words
The thread-wound golf ball of claim 2 wherein said specific gravity modifier comprises SiO 2 .
Claim 6
Dependent Claim
12 words
The thread-wound golf ball of claim 1 wherein said cover comprises balata.
Claim 7
Dependent Claim
14 words
The thread-wound golf ball of claim 1 wherein said cover comprises an ionomer resin.
Claim 8
Dependent Claim
14 words
The thread-wound golf ball of claim 1 wherein said thread rubber comprises natural rubber.
Claim 9
Dependent Claim
14 words
The thread-wound golf ball of claim 1 wherein said thread rubber comprises polybutadiene rubber.
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) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |