US4645207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Set of golf club irons
Assignee: Yokohama Rubber Co Ltd
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Filing: 1985-07-25
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Granted: 1987-02-24
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Expires: 2005-07-25
Abstract
Abstract A set of iron golf clubs, in which a grip is disposed at one end and a club head is disposed at the other end of a shaft, the length of the shaft is gradually decreased and the loft angle is gradually increased from a longer iron to a shorter iron, wherein the structure of the club head is made such that a hollow structure is taken for longer irons and a solid structure is taken for shorter irons in which the volume of hollow portion is gradually decreased as the number of the club changes from side of the longer iron to the shorter iron. The sole width of the club head gradually increases as the number of the club changes from the shorter irons to the longer irons.
Inventors
- 👤 Mitsutake Teramoto
- 👤 Shinkichi Saito
- 👤 Takamitsu Takebayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:16
CPC Classifications
A; A63; A63B; A63B53/00; A63B53/04; A63B53/047; A63B60/00; A63B53/005; A63B53/0458
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
A set of golf club irons, each including a shaft, a grip disposed at one end of the shaft, and a club head disposed at the other end of the shaft, the lengths of such irons being gradually decreased and the loft angles of the club heads being gradually increased from the longer irons to the shorter irons, the club heads of the longer irons having a hollow portion therein and the club heads of the shorter irons being devoid of any hollow portions therein, the volumes of said hollow portions in said longer irons being gradually decreased to zero as the number of the club changes from the longer irons to the shorter irons.
Claim 2
Dependent Claim
115 words
A set of golf club irons, each including a shaft, a grip disposed at one end of the shaft, and a club head disposed at the other end of the shaft, the lengths of such irons being gradually decreased and the loft angles of the club heads being gradually increased from the longer irons to the shorter irons, the club heads of the longer irons having a hollow portion therein and the club heads of the shorter irons being devoid of any hollow portions therein, the volumes of said hollow portions in said longer irons being gradually decreased to zero as the number of the club changes from the longer irons to the shorter irons.
Claim 3
Dependent Claim
49 words
A set of iron golf clubs as defined in claim 1, wherein the sole widths of the club heads measured across a widest part of the soles of the club heads are gradually increased as the number of the club changes from the shorter irons to the longer irons.
Claim 4
Dependent Claim
65 words
A set of iron golf clubs as defined in claim 1, wherein each longer iron club head comprises a face member and a back member of generally L-shaped configuration integrally joined thereto and defining the hollow portion, the volume of the hollow portion being adjusted and the center of gravity for the head being displaced rearward by the size and shape of the back member.
Claim 5
Dependent Claim
41 words
A set of iron golf clubs as defined in claim 1, wherein the hollow portion of each longer iron club head is defined by an opening directly bored at the top end face of the toe portion of the club head.
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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |