Patent US5338035A successfully refreshed from Google Patents.
US5338035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Practice golf club
Assignee: Individual
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Filing: 1991-11-26
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Granted: 1994-08-16
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Expires: 2011-11-26
Abstract
Abstract A practice golf club is presented. In accordance with the present invention, the practice golf club comprises upper and lower shafts connected by a one-way hinge. The one-way hinge is located near the lower end of the club. The upper shaft has a grip at its upper end and the lower shaft has a head at its lower end. The hinge is designed to break or pivot rearwardly at an angle relative to the reference plane of the club face. The reference plane of the club face is defined as the plane in which the club face of an iron having a 0° loft lies. This angle is from 0° (i.e., in the reference plane of the club face) to about 45°. During use of this practice club, the hinge will pivot mirroring the correct wrist position of the golfer during a correct golf stroke. Therefore, during the backswing of a correct swing, the hinge will break or pivot and remain so pivoted through most of the downswing as will the golfer's wrist. The upper and lower shafts will come back into alignment as the golfer's wrist straightens out just prior to the bottom of the downswing. Accordingly, unless the golfer's wrist are properly positioned during the backswing, the hinge will not pivot.
Inventors
- 👤 Keith S. Lyford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:49
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/36; A63B69/3623; A63B69/3632; A63B60/00; A63B60/0081
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
A practice golf club comprising: an upper shaft having a first predetermined length; a lower shaft having a second predetermined length, said second predetermined length being shorter than said first predetermined length; a grip secured about one end of said upper shaft; a club head secured at one end of said lower shaft, said club head having a club face; a first hinge member having first and second ends, said first end of said first hinge member being connected to one end of said lower shaft; and a second hinge member having first and second ends, said first end of said second hinge member being connected to one end of said upper shaft, said second end of said second hinge member being pivotably connected to said second end of said first hinge member to allow said lower shaft to pivot in a selected direction relative to said upper shaft, said selected direction being generally rearwardly and upwardly from a reference plane which corresponds to a plane in which said club face would lie with a 0° loft, and at a selected angle of approximately 45° relative to said reference plane.
Claim 2
Dependent Claim
190 words
A practice golf club comprising: an upper shaft having a first predetermined length; a lower shaft having a second predetermined length, said second predetermined length being shorter than said first predetermined length; a grip secured about one end of said upper shaft; a club head secured at one end of said lower shaft, said club head having a club face; a first hinge member having first and second ends, said first end of said first hinge member being connected to one end of said lower shaft; and a second hinge member having first and second ends, said first end of said second hinge member being connected to one end of said upper shaft, said second end of said second hinge member being pivotably connected to said second end of said first hinge member to allow said lower shaft to pivot in a selected direction relative to said upper shaft, said selected direction being generally rearwardly and upwardly from a reference plane which corresponds to a plane in which said club face would lie with a 0° loft, and at a selected angle of approximately 45° relative to said reference plane.
Claim 3
Dependent Claim
12 words
The practice golf club of claim 1 wherein said angle is 45°.
Claim 4
Dependent Claim
15 words
The practice golf club of claim 1 wherein said grip comprises a molded training grip.
Claim 5
Dependent Claim
14 words
The practice golf club of claim 1 wherein said club head comprises an iron.
Claim 6
Dependent Claim
16 words
The practice golf club of claim 4 further comprising: cover means disposed about said club head.
Claim 7
Dependent Claim
14 words
The practice golf club of claim 1 wherein said club head comprises a wood.
Claim 8
Dependent Claim
177 words
The practice golf club of claim 1 wherein said first hinge member comprises: a collar; a symmetrical portion depending downwardly from said collar and connected to one end of said lower shaft; and a tongue portion extending upwardly from said collar, said tongue portion having a first aperture extending laterally therethrough, one end of said tongue having a conformably sloping shoulder; wherein said second hinge member comprises: a body portion having a groove which defines a pair of fingers at one thereof, said tongue portion of said first hinge member being disposed between said fingers of said groove, one end of said groove having a rounded sloping shoulder being engaged by said conforming sloping shoulder of said tongue portion, said fingers having a second aperture therethrough, said first aperture through said tongue being in substantial alignment with said second aperture through said fingers; and a cylindrical portion extending upwardly from said body portion and connected to one end of said upper shaft; and a pin extending through said first and second apertures to provide said pivotal connection.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-15 | 1998-02-14 | 1998-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-15 | 2002-02-14 | 2002-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-15 | 2006-02-14 | 2006-08-16 | $7700.00 | Window Closed / Lapsed |