Patent US4027886A successfully refreshed from Google Patents.
US4027886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf swing timing device
Assignee: Individual
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Filing: 1975-09-19
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Granted: 1977-06-07
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Expires: 1995-09-19
Abstract
Abstract This invention relates to a device for measuring the rhythm and impact timing in golf club swings by noting the golfer's swing position corresponding to the collision of a movable tube with a stopper tube both located on the golf club shaft. Said movable tube is initially held against a magnetic element positioned at the upper grip portion of the tube, said magnetic element capable of being varied in its magnetic attractive, force. The movable tube is moved from said magnetic element due to centrifugal force during the golfer's swing.
Inventors
- 👤 Toyonari Katsube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:00
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/36; A63B69/3623; A63B69/3632; A63B24/00; A63B24/0062; A63B2024/0068; A63B2220/00; A63B2220/50; A63B2220/51
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
148 words
A device for measuring time of a golf swing comprising: 1. a golf club having a shaft, a clubhead portion and a grip portion; 2. a magnet element fixedly positioned on a part of the golf club shaft adjacent to the grip portion, said magnet element being in the form of a tube having replaceable magnetic inserts to vary its magnetic attractive force; 3. a stop unit fixedly mounted on said golf club shaft at a position close to the clubhead, and 4. a movable tube having a metal portion which can be attracted by the magnet element, said movable tube being also fitted on said club shaft intermediate said magnet element and said stop unit and being adapted to move away from said magnet element toward said stop unit in response to centrifugal force created by the golfer's swing so as to collide with said stop unit.
Claim 2
Independent Claim
148 words
A device for measuring time of a golf swing comprising: 1. a golf club having a shaft, a clubhead portion and a grip portion; 2. a magnet element fixedly positioned on a part of the golf club shaft adjacent to the grip portion, said magnet element being in the form of a tube having replaceable magnetic inserts to vary its magnetic attractive force; 3. a stop unit fixedly mounted on said golf club shaft at a position close to the clubhead, and 4. a movable tube having a metal portion which can be attracted by the magnet element, said movable tube being also fitted on said club shaft intermediate said magnet element and said stop unit and being adapted to move away from said magnet element toward said stop unit in response to centrifugal force created by the golfer's swing so as to collide with said stop unit.
Claim 3
Dependent Claim
18 words
The device of claim 1 wherein said tube and said stop unit are composed of hard plastic material.
Claim 4
Independent Claim
152 words
A device for measuring time of a golf swing comprising: 1. a golf club having a shaft, a clubhead portion and a grip portion; 2. a magnet element fixedly positioned on a part of the golf club shaft adjacent to the grip portion, said magnet element adapted to be varied in its magnetic attractive force; 3. a stop unit fixedly mounted on said golf club shaft at a position close to the clubhead, and 4. a movable tube fitted on said club shaft intermediate said magnet element and said stop unit and having an upper metallic spring element so as to hold said tube about said golf club shaft as well as being attracted to said magnet element, said movable tube being adapted to move away from said magnet element toward said stop unit in response to centrifugal force created by the golfer's swing so as to collide with said stop unit.
Claim 5
Independent Claim
152 words
A device for measuring time of a golf swing comprising: 1. a golf club having a shaft, a clubhead portion and a grip portion; 2. a magnet element fixedly positioned on a part of the golf club shaft adjacent to the grip portion, said magnet element adapted to be varied in its magnetic attractive force; 3. a stop unit fixedly mounted on said golf club shaft at a position close to the clubhead, and 4. a movable tube fitted on said club shaft intermediate said magnet element and said stop unit and having an upper metallic spring element so as to hold said tube about said golf club shaft as well as being attracted to said magnet element, said movable tube being adapted to move away from said magnet element toward said stop unit in response to centrifugal force created by the golfer's swing so as to collide with said stop unit.
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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |