Patent US3897068A successfully refreshed from Google Patents.
US4576378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Golf pronation training device
Assignee: Individual
•
Filing: 1984-06-13
•
Granted: 1986-03-18
•
Expires: 2004-06-13
Abstract
Abstract Golf pronation training device (10) is composed of a thin, flat airfoil (18) and a pair of flanges (21) formed with slotted bores (30) for receiving therein a shaft of a golf club. A plurality of thumbscrews (42) extend through the flange (21) to engage insert members (44) mounted on the flanges to lock the golf club shaft within bore (30) at a selected location along the length of the shaft and at desired angular orientation relative to the face of the club shaft. The effective area of airfoil (18) may be altered by selectively removing plugs (58) disposed within circular openings (56) spaced about the area of the airfoil. The training device (10) imparts a progressively increasing torque load on the club during the down swing tending to rotate the club head relative to the longitudinal axis of the club shaft to facilitate proper pronation of the golfer's hands. After the club strikes the ball, the continued rotation of the airfoil (10) results in a rapid decline of the air drag, thus enhancing the tendency of the golfer to follow through with his swing.
Inventors
- 👤 George S. Backus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:04
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/008; A63B21/0085; A63B21/0088; A63B21/00058; A63B21/00069; A63B69/00; A63B69/36; A63B69/3623; A63B69/3632
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
212 words
In combination with a golf club, a lightweight training device, comprising: (a) a lightweight, thin, substantially planar, singular airfoil portion; (b) a first, elongated, marginal side edge portion extending along one side edge of said singular airfoil portion, said side edge portion being substantially thicker than the thickness of said singular airfoil portion; and, (c) means for detachably attaching said first side edge portion to the shaft of the golf club to: dispose said first side edge portion longitudinally adjacent the length of the golf club shaft; and, adjustably, angularly orientate said airfoil portion about the longitudinal axis of the golf club shaft alternatively between a first variable position wherein said airfoil portion extends in a selective orientation about the longitudinal axis of the golf club shaft generally in a direction opposite to and parallel to the face of the head of the golf club and a second variable position wherein said airfoil portion extends in a selective orientation about the longitudinal axis of the golf club shaft generally in the same direction as and parallel to the face of the head of the golf club thereby to selectively alter the magnitude and the direction of the torque load that is applied to the club shaft during the swinging of the club.
Claim 2
Dependent Claim
212 words
In combination with a golf club, a lightweight training device, comprising: (a) a lightweight, thin, substantially planar, singular airfoil portion; (b) a first, elongated, marginal side edge portion extending along one side edge of said singular airfoil portion, said side edge portion being substantially thicker than the thickness of said singular airfoil portion; and, (c) means for detachably attaching said first side edge portion to the shaft of the golf club to: dispose said first side edge portion longitudinally adjacent the length of the golf club shaft; and, adjustably, angularly orientate said airfoil portion about the longitudinal axis of the golf club shaft alternatively between a first variable position wherein said airfoil portion extends in a selective orientation about the longitudinal axis of the golf club shaft generally in a direction opposite to and parallel to the face of the head of the golf club and a second variable position wherein said airfoil portion extends in a selective orientation about the longitudinal axis of the golf club shaft generally in the same direction as and parallel to the face of the head of the golf club thereby to selectively alter the magnitude and the direction of the torque load that is applied to the club shaft during the swinging of the club.
Claim 3
Dependent Claim
21 words
The combination of claim 1, wherein said airfoil is shaped to taper in the direction away from said first edge portion.
Claim 4
Dependent Claim
69 words
The combination of claim 1, wherein said airfoil includes a lower edge portion disposed along the portion of said airfoil directed generally toward the lower end of the club shaft, said lower edge portion being oriented relative to said first edge portion to correspond generally to the angle of inclination of the lower edge of the face of the club head relative to the length of the club shaft.
Claim 5
Dependent Claim
19 words
The combination of claim 1, wherein said airfoil includes means for varying the surface area of said airfoil portion.
Claim 6
Dependent Claim
47 words
The combination of claim 4, wherein said means for varying the surface area of said airfoil portion includes a plurality of areas partially severed from said airfoil portion wherein said partially severed areas may be removed from said airfoil portion to create openings in said airfoil portion.
Claim 7
Dependent Claim
35 words
The combination of claim 4, wherein said means for varying the surface area of said airfoil portion includes openings formed in said airfoil portion and plug members adapted to be snugly engageable within said openings.
Claim 8
Dependent Claim
18 words
The combination of claim 6, wherein said openings are spaced apart about the area of the airfoil portion.
Claim 9
Dependent Claim
120 words
The combination of claim 1, wherein said attachment means comprises: (a) at least one pair of spaced apart flange members integrally constructed with and extending generally transversely outwardly from said first side edge portion, said flange members: having portions defining a bore for snugly receiving and substantially encircling the golf club shaft; and, defining a first slot therebetween, said first slot extending generally radially outwardly from said bore to permit passage of the shaft of the golf club between said flange members when engaging the shaft into said bore and removing the shaft from said bore; and, (b) means for releasably pressing together said flange members to prevent angular movement of said airfoil portion relative to the golf club shaft.
Claim 10
Dependent Claim
31 words
The combination of claim 8, further comprising a second slot extending diametrically from said bore and into said first side edge portion in a direction generally opposite to said first slot.
Claim 11
Dependent Claim
66 words
The combination of claim 8, further comprising means for selectively varying the drag on said airfoil as the golf club is swung in an arc recognizable as a golf swing, said drag varying means including a plurality of areas partially severed from said airfoil portion wherein said partially severed areas are adapted to be removed from said airfoil portion to create openings in said airfoil portion.
Claim 12
Dependent Claim
52 words
The combination of claim 8, further comprising means for selectively varying the drag on said airfoil as the golf club is swung in an arc recognizable as a golf swing, said drag varying means including openings formed in said airfoil portion and plug members adapted to be snugly engaged within said openings.
Claim 13
Dependent Claim
14 words
The combination according to claim 1, wherein said airfoil portion is generally quadrilaterally shaped.
References Cited (Backward Citations)
US1536512A
Cited
US2169774A
Cited
US2986937A
Cited
US3142485A
Cited
US3463492A
Cited
US3595577A
Cited
US3565444A
Cited
US3809397A
Cited
US3719363A
Cited
US3758117A
Cited
US3776556A
Cited
US3829102A
Cited
US4195439A
Cited
US4416451A
Cited
GB2060405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |