US4819939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grip for a golf club shaft
Assignee: Maruman Golf Co Ltd
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Filing: 1986-10-28
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Granted: 1989-04-11
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Expires: 2006-10-28
Abstract
Abstract A double-layered tubular grip (13) for a golf club shaft, comprises a tubular inner layer (14) made of a porous material secured to the outer surface of the butt end portion of the shaft (11). A tubular outer layer (15) made of a non-porous material having an elasticity greater than that of the inner layer (14) is formed separately from the inner layer (14). The outer layer (15) is pushed over the inner layer (14) and detachably fixed thereto after the inner layer (14) is secured to the outer surface of the golf club shaft (11).
Inventors
- 👤 Masashi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:22
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/14; A63B60/00; A63B60/06; A63B60/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A double-layered tubular grip for a golf club shaft having a butt end portion, comprising: a tubular inner layer made of a porous material having an elasticity, said inner layer being molded on and securely fixed to the outer surface of the butt end portion of said shaft; and a tubular outer layer made of a non-porous material having an elasticity greater than that of said inner layer, a wear-resistant property greater than that of said inner layer, and being formed separately from said inner layer, said outer layer being pushed over said inner layer and detachably fixed thereto after said inner layer is molded on and securely fixed to said outer surface of said butt end portion of said shaft.
Claim 2
Dependent Claim
121 words
A double-layered tubular grip for a golf club shaft having a butt end portion, comprising: a tubular inner layer made of a porous material having an elasticity, said inner layer being molded on and securely fixed to the outer surface of the butt end portion of said shaft; and a tubular outer layer made of a non-porous material having an elasticity greater than that of said inner layer, a wear-resistant property greater than that of said inner layer, and being formed separately from said inner layer, said outer layer being pushed over said inner layer and detachably fixed thereto after said inner layer is molded on and securely fixed to said outer surface of said butt end portion of said shaft.
Claim 3
Dependent Claim
56 words
A grip according to claim 1, wherein said inner layer securely fixed to said shaft has an outer diameter which increases gradually from a tip end thereof to a butt end thereof, and said outer layer detachably fixed to said inner layer has a constant thickness from a tip end thereof to a butt end thereof.
Claim 4
Dependent Claim
71 words
A grip according to claim 1, wherein said inner layer securely fixed to said shaft has an outer diameter which increases gradually from a tip end thereof to a middle thereof and remains substantially constant from the middle thereof to a butt end thereof, and said outer layer detachably fixed to said inner layer has an outer diameter which increases gradually from a tip end thereof to a butt end thereof.
Claim 5
Dependent Claim
69 words
A grip according to claim 1, wherein said inner layer securely fixed to said shaft has an outer diameter which increases gradually from a tip end thereof to middle thereof and decreases gradually from the middle thereof to a butt end thereof, and said outer layer detachably fixed to said inner layer has an outer diameter which increases gradually from a tip end thereof to a butt end thereof.
Claim 6
Dependent Claim
50 words
A grip according to claim 1, wherein said inner and outer layers have a plurality of positive cavities disposed therebetween in order to increase the ease of deformation of said outer layer between each of said cavities and the outer surface of said outer layer while gripping said outer layer.
Claim 7
Dependent Claim
16 words
A grip according to claim 1, wherein said inner layer is made of a foam urethane.
Claim 8
Dependent Claim
16 words
A grip according to claim 1, wherein said outer layer is made of a vulcanized rubber.
Claim 9
Dependent Claim
24 words
A grip according to claim 1, wherein said outer layer is detachably fixed to said inner layer by means of a double-face adhesive tape.
Claim 10
Dependent Claim
16 words
A grip according to claim 1, wherein said inner layer is made of a foam rubber.
Claim 11
Dependent Claim
23 words
A grip according to claim 1, wherein said outer layer is detachably fixed to said inner layer by means of an exfoliative adhesive.
Claim 12
Dependent Claim
27 words
The tubular grip of claim 1, wherein the golf club shaft extends substantially along the entire length of the tubular inner layer and the tubular outer layer.
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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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |