US3764137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination stiff and flexible golf club shaft
Assignee: Individual
•
Filing: 1972-06-09
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Granted: 1973-10-09
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Expires: 1992-06-09
Abstract
Abstract A golf club haVing a shaft construction that inhibits rearward flexing of the shaft at the top of the back swing and initial part of the down swing while permitting forward flexing through the ball on the down swing. A rearwardly facing side of a wall of the shaft is formed of a plurality of sections that extend longitudinally along the shaft and that have proximately located facing ends.
Inventors
- 👤 A Petro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:06
CPC Classifications
A; A63; A63B; A63B53/00; A63B60/00; A63B60/0081
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
160 words
In a golf club having a shaft extending between a head and a grip, the head being adapted to hit a golf ball while moving forwardly during a down swing that is imparted to the club while it is being held by the grip after the club has been moved through a back swing; said shaft comprising: a plurality of adjacent sections located exclusively on a rearwardly facing side of said shaft and extending longitudinally of said shaft, an end of each of said sections facing an end of an adjoining section, said plurality of sections constituting means on said shaft whereby said ends are proximate to each other in an unflexed condition of said shaft, forced against each other during a back swing and the initial part of the down swing thereby inhibiting rearward flexing of said shaft, and spaced apart from each other during the latter part of the down swing thereby allowing forward flexing of said shaft.
Claim 2
Dependent Claim
160 words
In a golf club having a shaft extending between a head and a grip, the head being adapted to hit a golf ball while moving forwardly during a down swing that is imparted to the club while it is being held by the grip after the club has been moved through a back swing; said shaft comprising: a plurality of adjacent sections located exclusively on a rearwardly facing side of said shaft and extending longitudinally of said shaft, an end of each of said sections facing an end of an adjoining section, said plurality of sections constituting means on said shaft whereby said ends are proximate to each other in an unflexed condition of said shaft, forced against each other during a back swing and the initial part of the down swing thereby inhibiting rearward flexing of said shaft, and spaced apart from each other during the latter part of the down swing thereby allowing forward flexing of said shaft.
Claim 3
Dependent Claim
28 words
The golf club of claim 1 wherein the shaft is tubular and wherein the sections are on the rearwardly facing side of the back portion of the shaft.
Claim 4
Dependent Claim
28 words
The golf club of claim 1 wherein the shaft is tubular and wherein the sections are on the rearwardly facing side of the front portion of the shaft.
Claim 5
Dependent Claim
32 words
The golf club of claim 1 wherein a plurality of rearwardly facing slits intersecting the shaft periphery are formed in the rearwardly facing side of the shaft to thus form said sections.
Claim 6
Dependent Claim
31 words
The golf club of claim 4 wherein the shaft is tubular and wherein the back portion of the shaft, containing the slits, is thicker than the front portion of the shaft.
Claim 7
Dependent Claim
31 words
The golf cluB of claim 4 wherein the shaft is tubular and wherein the front portion of the shaft, containing the slits, is thicker than the back portion of the shaft.
Claim 8
Dependent Claim
33 words
The golf club of claim 1 wherein said sections extend at least 180* about the periphery of the shaft and are fastened to the shaft periphery along the longitudinal centerline of the shaft.
Claim 9
Dependent Claim
17 words
The golf club of claim 1 wherein said sections extend along the lower part of the shaft.
Claim 10
Dependent Claim
19 words
The golf club of claim 1 wherein said sections are made of metal and are bonded on said shaft.
Claim 11
Dependent Claim
19 words
The golf club of claim 1 wherein said sections are progressively smaller as they extend downwardly of said shaft.
Claim 12
Dependent Claim
17 words
The golf club of claim 10 wherein said sections extend along the lower part of the shaft.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |