Adjustable stiffness shaft structure

a shaft structure and adjustable technology, applied in the field of golf clubs and fishing rod shafts, can solve the problems of golf ball to slice, complex process, high cost, etc., and achieve the effect of easy chang

Inactive Publication Date: 2009-06-25
QUALIZZA GREGORY KEITH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]In order for a golf club to be effective and ultimately configured for a golfer by the golfer without requiring the golfer to have intimate knowledge or club-building skills, the present invention provides for a device that can be easily changed to accommodate the golfer's abilities for any given ...

Problems solved by technology

A golf shaft that is too flexible tends to promote a hook whereas a golf shaft that is too stiff tends to cause the golf ball to slice.
Typically, the process is time consuming and involves numerous pieces of equipment, expertise and expense.
However, a golfer's performance can dramatically change over time.
The heavier, liquid filled golf shaft will profoundly slow down a golfer's swing speed thereby resulting in an unacceptable loss of distance which would, of course, have a, detrimental effect.
Golf shafts that are filled with a compressible ga...

Method used

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  • Adjustable stiffness shaft structure
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Examples

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Embodiment Construction

[0025]FIG. 1 reveals an illustrative golf club 2 that incorporates an embodiment of a shaft structure 4 of the present invention. In the preferred embodiment, shaft structure 4 includes an inner shaft structure 6 and outer shaft structure 8. Outer shaft structure 8 is fashioned as a conventional golf shaft with an associated stiffness. Those skilled in the art will recognize that a multitude of materials may be used for both the inner and outer shaft structure and that using alternative materials does not deviate from the scope or spirit of the present invention. Stiffness is indicated by stiffness indicator 5 which is affixed firmly to the butt and of the grip. Indication of stiffness is demonstrated by the dial markings of stiffness indicator 5 and by the relative position of the capstan 20.

[0026]With reference to FIG. 2 inner shaft structure 6 is comprised of a proximal end and a distal end. Proximal end of inner shaft structure 6 is further comprised of pressurization unit 9. Di...

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Abstract

A shaft structure with an adjustable stiffness is provided for golf clubs, fishing rods and like apparatuses. The shaft structure employs an inner and outer shaft structure. The golfer, in practice, configures the stiffness of a golf shaft, by adjusting the pressure of an inner shaft structure. The combination of outer and inner shaft structure stiffness results in an advantageous stiffness profile. The golfer can, at any time and very easily, change the stiffness profile of the golf shaft.

Description

FIELD OF THE INVENTION[0001]This invention relates to shafts for golf clubs, fishing rods and like apparatuses and more particularly where the stiffness of these devices can be adjusted by the user in an advantageous manner to match their physical abilities.BACKGROUND OF THE INVENTION[0002]Golf shafts are typically manufactured with a predetermined stiffness or flex. The stiffness of a golf shaft refers to its resistance to bend under load and is typically measured as the amount of deflection the shaft experiences when the shaft is positioned horizontally and subjected to a constant force. Presently, golf shafts are mass produced with a predefined stiffness or flex without regard for a golfer's individual swing mechanics. Typically, the flex is provide in discreet stiffness's such as A, R, S, X. These flex ranges are designed in an attempt to accommodate a vast multitude of golfers.[0003]The correct stiffness of a golf shaft plays a pivotal role in proper club performance. A golf sh...

Claims

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Application Information

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IPC IPC(8): A63B53/12
CPCA63B53/08A63B53/10A63B59/0014A63B2059/0081A63B59/0074A63B2059/0003A63B59/0033A63B60/10A63B60/16A63B60/06A63B60/08A63B60/42A63B60/00A63B60/002A63B60/0081
Inventor QUALIZZA, GREGORY KEITH
Owner QUALIZZA GREGORY KEITH
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