Claims
- 1. In a plastic golf club shaft for a golf club having opposite tip and butt ends, the improvement comprising:
- at least one vibration preventing piece made of a metal alloy disposed at a position along said shaft located within a distance range defined by an inequality of 1.8.gtoreq.c/d.gtoreq.0.35 wherein c designates a distance between the tip end of said golf club shaft and a center of said vibration preventing piece and d designates a distance between the butt end of said golf club shaft and said center of said vibration preventing piece wherein said vibration preventing piece is located generally coincident with the kickpoint of the shaft for suppressing the transmission of vibrations to a player's hands during ball impact.
- 2. The golf club shaft as claimed in claim 1, wherein said vibration preventing piece is constructed in an annular configuration while using a shape memory alloy or a vibration suppressing alloy.
- 3. The golf club shaft as claimed in claim 2, wherein said shape memory alloy is any one selected from a group of Cu-Zn-Al-Mn based alloy, Cu-Zn-Al based alloy and Ti-Ni based alloy.
- 4. The golf club shaft as claimed in claim 1, wherein said vibration preventing piece is dimensioned such that a thickness of said piece is equal to or less than 3 mm, a length of said piece in the axial direction of said golf club shaft remains within a range of 5 to 30 mm and a weight of said piece remains within a range of 0.5 to 12 grams.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-144379 |
Jun 1990 |
JPX |
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Parent Case Info
This is a continuation-in-part of application Ser. No. 708,746, filed May 31, 1991, now abandoned.
US Referenced Citations (10)
Foreign Referenced Citations (7)
Number |
Date |
Country |
8606286 |
Nov 1986 |
EPX |
24769 |
Jan 1912 |
GBX |
471020 |
Aug 1937 |
GBX |
1201648 |
Aug 1970 |
GBX |
2053004 |
Feb 1981 |
GBX |
2053698 |
Feb 1981 |
GBX |
2227418 |
Aug 1990 |
GBX |
Non-Patent Literature Citations (1)
Entry |
"Golf World", Magazine, Apr. 12, 1968 issue, Advertisement for "Hex Flex" Shafts. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
708746 |
May 1991 |
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