Patent US3606340A successfully refreshed from Google Patents.
US3606340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Practice golf device
Assignee: Individual
•
Filing: 1970-02-13
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Granted: 1971-09-20
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Expires: 1990-02-13
Abstract
Abstract A GOLF "CLUB" FOR PRACTICE SWINGS HAS THE USUAL CLUB HEAD REPLACED BY A MASS ECCENTRICALLY PIVOTED FOR FREE SWINGING MOVEMENT ON A PIVOT AXIS PERPENDICULAR TO THE LENGTH OF THE SHAFT AND PARALLEL TO THE SWING DIRECTION. THE MASS IS FREELY SWINGABLE THROUGH A RANGE OF POSITIONS THAT INCLUDE THE POSITION WHEREIN THE CENTER OF GRAVITY OF THE MASS IS ALIGNED WITH THE SHAFT. THE MASS MAY TAKE THE FORM OF A FLAT BLADE AND IT MAY INCLUDE A LOFTED PORTION WHICH CAN BE USED EFFECTIVELY FOR HITTING A GOLF BALL. CERTAIN SWING ERRORS ARE SIGNALLED TO THE PLAYER BY DYNAMIC REACTION OF THE MASS.
Inventors
- 👤 Ralph H Tiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:14
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/36; A63B69/3623; A63B69/3632
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |