US4508350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club head
Assignee: GREENIRONS Inc
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Filing: 1982-09-29
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Granted: 1985-04-02
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Expires: 2002-09-29
Abstract
Abstract A golf club putter is constructed with a head having a high polar moment of inertia about its preferred ball striking point by forming the putter head body out of light weight material, such as aluminum, with relatively large heel and toe cavities. A predetermined mass of heavy material such as molten lead is poured into the cavities along with a small amount of uncured epoxy. At the temperature of molten lead, epoxy loses much of its viscosity and flows on the surface of the lead to fill voids caused by contraction of the lead. A thin cover preferably of a decorative material like polished brass then is bonded to a flange formed about each cavity by the epoxy to close each cavity.
Inventors
- 👤 Clovis R. Duclos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:20
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/0487; A63B53/02; A63B53/021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
213 words
A golf club head including: a body casting constructed from material having a first predetermined density, said body casting having: a front golf ball striking surface; a heel cavity having cast and adhesively bonded therein a predetermined amount of a material having a second predetermined density substantially more dense than said first predetermined density; and a toe cavity having cast and adhesively bonded therein a predetermined amount of a material having said second predetermined density whereby said head has a high polar moment of inertia to resist turning forces applied to said face; and a back surface through which said heel and toe cavities open, said heel and toe cavities each including: a peripheral flange formed adjacent said back surface, and said head further including: a heel plate connected to said heel flange to close said heel cavity at said back surface; and a toe plate connected to said toe flange to close said toe cavity at said back surface, wherein said body further includes: a sole surface intersecting said front golf ball striking surface; and a center of gravity, said front golf ball striking surface having: a golf ball striking spot thereon about a golf ball radius above said sole surface, said golf ball striking spot being above said center of gravity.
Claim 2
Dependent Claim
213 words
A golf club head including: a body casting constructed from material having a first predetermined density, said body casting having: a front golf ball striking surface; a heel cavity having cast and adhesively bonded therein a predetermined amount of a material having a second predetermined density substantially more dense than said first predetermined density; and a toe cavity having cast and adhesively bonded therein a predetermined amount of a material having said second predetermined density whereby said head has a high polar moment of inertia to resist turning forces applied to said face; and a back surface through which said heel and toe cavities open, said heel and toe cavities each including: a peripheral flange formed adjacent said back surface, and said head further including: a heel plate connected to said heel flange to close said heel cavity at said back surface; and a toe plate connected to said toe flange to close said toe cavity at said back surface, wherein said body further includes: a sole surface intersecting said front golf ball striking surface; and a center of gravity, said front golf ball striking surface having: a golf ball striking spot thereon about a golf ball radius above said sole surface, said golf ball striking spot being above said center of gravity.
Claim 3
Dependent Claim
56 words
The golf club head as defined in claim 1 wherein said body casting has: a notch therein in the same vertical plane as said golf ball striking spot; and circular indicia below said notch whereby said circular indicia can be observed through said notch when said golf head is properly aligned with respect to its user.
Claim 4
Dependent Claim
80 words
The golf club head as defined in claim 1 wherein said heel and toe cavities include: front surfaces generally parallel to said front golf ball striking surface; generally parallel upper and lower surfaces which are generally perpendicular to said front golf ball striking surface; generally circular outer surfaces which are generally perpendicular to said front golf ball striking surface; and inner surfaces which slant downwardly toward each other and which are generally perpendicular to said front golf ball striking surface.
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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) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |