Patent US2850247A successfully refreshed from Google Patents.
Patent US4754969A successfully refreshed from Google Patents.
US4754969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Set of golf clubs
Assignee: Maruman Golf Co Ltd
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Filing: 1986-09-26
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Granted: 1988-07-05
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Expires: 2006-09-26
Abstract
Abstract A set of golf clubs wherein each club head includes a closed hollow behind the striking face. The thickness of each striking face is gradually decreased as the length of each shaft is gradually increased.
Inventors
- 👤 Masashi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:45
CPC Classifications
A; A63; A63B; A63B60/00; A63B53/00; A63B53/04; A63B53/0416; A63B53/0466; A63B53/047; A63B53/005; A63B53/0433
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A set of golf clubs each having a shaft with a different length and a club-head attached to said shaft, each of said club-heads having a front wall at a different loft for hitting a golf ball and a closed hollow space formed in said club head immediately behind said front wall, each front wall of each club-head having a resiliency greater than the resiliency of the remaining portion of said club-head and also having a uniform thickness, the front walls of said club-heads having different thicknesses such that the thickness gradually decreases in accordance with the gradual increase in the length of said shafts.
Claim 2
Dependent Claim
105 words
A set of golf clubs each having a shaft with a different length and a club-head attached to said shaft, each of said club-heads having a front wall at a different loft for hitting a golf ball and a closed hollow space formed in said club head immediately behind said front wall, each front wall of each club-head having a resiliency greater than the resiliency of the remaining portion of said club-head and also having a uniform thickness, the front walls of said club-heads having different thicknesses such that the thickness gradually decreases in accordance with the gradual increase in the length of said shafts.
Claim 3
Dependent Claim
63 words
A set of golf clubs according to claim 1, wherein each of said club-heads having said front wall is made of stainless steel, and only each of said front walls of said club-heads has characteristics corresponding to those resulting from being subjected to an annealing treatment so as to have a resiliency greater than the resiliency of the remaining portion of said club-head.
Claim 4
Dependent Claim
86 words
A set of golf clubs according to claim 1, wherein each club-head has a body, each body having a front side and a recess formed in said front side, and each front wall is made of a springly plate member having a resiliency greater than the resiliency of said body and secured to said front side of said body in a manner such that said recess of said body is covered by said front wall so as to define a closed hollow behind said front wall.
Claim 5
Dependent Claim
19 words
A set of golf clubs according to claim 3, wherein said bodies of said club-heads are made of wood.
References Cited (Backward Citations)
US1359220A
Cited
US2447967A
Cited
US4023802A
Cited
US4432549A
Cited
US4489945A
Cited
JPS59193462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |