Patent US4515368A successfully refreshed from Google Patents.
US4515368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club swing training device
Assignee: Individual
•
Filing: 1983-02-25
•
Granted: 1985-05-07
•
Expires: 2003-02-25
Abstract
Abstract A device for improving the mechanics of a golfer's swing which is attached to the golf club and adjacent to the grip, and which emits a continuous audible signal so long as the device is subjected to at least a predetermined centrifugal force which is generated by swinging the club. The device includes a battery, buzzer and switch which is spring biased to force the switch open. The spring is compressed by the centrifugal force generated by swinging the club to allow the switch to close and activate the buzzer. The spring may be adjustably prestressed to vary the amount of centrifugal force needed to close the switch.
Inventors
- 👤 Donald L. Petitjean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:27
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/36; A63B69/3623; A63B69/3632; A63B69/3635
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
A golf club swing training device comprising the combination of a golf club and an attachment therefor, said attachment comprising, housing means attachable to said shaft, electrically operated means within said housing actuated by centrifugal force generated by swinging the club, said electrically operated means having audbile signal emitting means for emitting a continuous audible signal for as long as the club speed achieved during the swing generates a centrifugal force equal to or greater than a predetermined minimum, the housing attachment means being positionable on the club shaft approximately at the swing weight point on the club as determined by a swing weight machine such that there is no substantial change in the swing weight of the club with the device attached.
Claim 2
Dependent Claim
123 words
A golf club swing training device comprising the combination of a golf club and an attachment therefor, said attachment comprising, housing means attachable to said shaft, electrically operated means within said housing actuated by centrifugal force generated by swinging the club, said electrically operated means having audbile signal emitting means for emitting a continuous audible signal for as long as the club speed achieved during the swing generates a centrifugal force equal to or greater than a predetermined minimum, the housing attachment means being positionable on the club shaft approximately at the swing weight point on the club as determined by a swing weight machine such that there is no substantial change in the swing weight of the club with the device attached.
Claim 3
Dependent Claim
35 words
The combination of claim 1 in which the audible signal emitting means further comprises means for varying the amount of centrifugal force needed to cause the audible signal emitting means to emit the audible signal.
Claim 4
Dependent Claim
87 words
The combination of claim 1 in which the audible signal emitting means comprises a circuit having a power source, buzzer and switch, and resilient means biased to force the switch open and responsive to the centrifugal force generated by swinging the club so that when the centrifugal force is equal to or greater than the predetermined minimum, the switch will close against the force of the resilient means to close the circuit and activate the buzzer for as long as the centrifugal force exceeds the predetermined minimum.
References Cited (Backward Citations)
US1549350A
Cited
US1676270A
Cited
US2135648A
Cited
US2214356A
Cited
US2158211A
Cited
US2203893A
Cited
US2218943A
Cited
US2396408A
Cited
US2543722A
Cited
US2787470A
Cited
US2950115A
Cited
US3106403A
Cited
US3172668A
Cited
US3070373A
Cited
US3113781A
Cited
US3113782A
Cited
US3254895A
Cited
US3215437A
Cited
US3226704A
Cited
US3498616A
Cited
US3561272A
Cited
US3848873A
Cited
US4270753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |