US4878672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf club with swing speed indicator
Assignee: RAM GOLF Corp 2020 INDIAN BOUNDARY DR MELROSE PARK IL 60160 A CORP OF
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Filing: 1988-07-11
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Granted: 1989-11-07
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Expires: 2008-07-11
Abstract
Abstract A fitting golf club for determining the flexibility of a golf club shaft, the club including an elongated shaft having one shaft end portion adapted to be grasped in a person's hands and an opposite shaft end portion with a golf club head attached. An indicia bearing screw head is adjustable between a plurality of different positions. Mechanisms associated with the adjustable head are operative responsive to the centrifugal force applied upon swinging of the fitting golf club. The mechanisms include a weight pivotally mounted within the head on an axis perpendicular to the shaft and parallel with the swing direction, the weight being movable between an armed position adjacent the upper side of said head to a released position adjacent the lower side of said head. The optimum shaft flexibility for the person being tested is determined by the position of adjustment of the adjustable head when compared with the time of release of the weight.
Inventors
- 👤 Robert F. Lukasiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:31
CPC Classifications
A; A63; A63B; A63B60/00; A63B60/42; A63B53/00; A63B53/02; A63B53/022; A63B53/023; A63B53/025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
171 words
A fitting golf club for determining the flexibility of a golf club shaft, said fitting golf club including an elongated shaft having one shaft end portion adapted to be grasped in a person's hands and an opposite shaft end portion, a fitting golf club head attached to said opposite shaft end portion, and adjustable means on said golf club head adjustable between a plurality of different positions, indicia for determining a particular position of adjustment, and mechanisms associated with said adjustable means operative responsive to the centrifugal force applied upon swinging of the fitting golf club, said mechanisms including a weight pivotally mounted within said head on an axis perpendicular to said shaft and parallel with the swing direction, said weight being movable between an armed position adjacent the upper side of said head to a released position adjacent the lower side of said head, the optimum shaft flexibility for said person being determinable by comparison of the release of said weight with the position of adjustment of said adjustable means.
Claim 2
Dependent Claim
171 words
A fitting golf club for determining the flexibility of a golf club shaft, said fitting golf club including an elongated shaft having one shaft end portion adapted to be grasped in a person's hands and an opposite shaft end portion, a fitting golf club head attached to said opposite shaft end portion, and adjustable means on said golf club head adjustable between a plurality of different positions, indicia for determining a particular position of adjustment, and mechanisms associated with said adjustable means operative responsive to the centrifugal force applied upon swinging of the fitting golf club, said mechanisms including a weight pivotally mounted within said head on an axis perpendicular to said shaft and parallel with the swing direction, said weight being movable between an armed position adjacent the upper side of said head to a released position adjacent the lower side of said head, the optimum shaft flexibility for said person being determinable by comparison of the release of said weight with the position of adjustment of said adjustable means.
Claim 3
Dependent Claim
80 words
A golf club in accordance with claim 1 wherein said yieldable means comprises a latch pivotally mounted within said head on an axis parallel with the pivot axis of said weight, said latch engaging said weight to normally hold the weight in the armed position, a spring means engaging said latch whereby in response to said centrifugal force said weight moves said latch in opposition to said spring means whereby said weight is released for movement to said released position.
Claim 4
Dependent Claim
31 words
A golf club in accordance with claim 2 wherein said adjustable means is connected to said spring means for thereby varying the amount of centrifugal force required to release said weight.
Claim 5
Dependent Claim
44 words
A golf club in accordance with claim 3 wherein said adjustable means comprises a screw head mounted on the exterior of said club head and displaying indicia, and adjacent indicia displayed on said club head so that the position of adjustment can be determined.
Claim 6
Dependent Claim
50 words
A golf club in accordance with claim 3 including a resetting pin accessible from the exterior of said club head, said pin being attached to said weight and being manually engageable for moving said weight from said released position back to said armed position in opposition to said spring means.
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) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |