Golf club
US-9220952-B2 · Dec 29, 2015 · US
Golf club shaft
US8979666B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8979666-B2 |
| Application number | US-201213474233-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 17, 2012 |
| Priority date | May 18, 2011 |
| Publication date | Mar 17, 2015 |
| Grant date | Mar 17, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
In a shaft 6 , a shaft full length is defined as Ls, and a distance between a tip end of the shaft and a center of gravity G of the shaft is defined as Lg. Lg/Ls is 0.52 or greater and 0.65 or less. A shaft weight is equal to or less than 52 g. Preferably, the shaft 6 has butt partial layers a 5 and a 6 . When a point separated by 250 mm from a butt end Bt is defined as P 2 ; a range from the point P 2 to the butt end Bt is defined as a specific butt range; the total weight of the butt partial layers a 5 and a 6 existing in the specific butt range is Wa gram; and a weight of the shaft in the specific butt range is defined as Wb gram, Wa/Wb is preferably equal to or greater than 0.4.
First claim
Opening claim text (preview).
What is claimed is: 1. A golf club shaft having a tip end and a butt end with a butt partial layer, wherein if the shaft full length is defined as Ls and a distance between a tip end of the shaft and a center of gravity G of the shaft is defined as Lg, then Lg/Ls is 0.52 or greater and 0.65 or less; a shaft weight is equal to or less than 52 g; and wherein if a point separated by 250 mm from the butt end Bt is defined as P 2 ; a range from the point P 2 to the butt end Bt is…
Assignees
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Classifications
- A63B53/10Primary
Human Necessities · mapped topic
Human Necessities · mapped topic
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Frequently asked questions
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- What does patent US8979666B2 cover?
- In a shaft 6 , a shaft full length is defined as Ls, and a distance between a tip end of the shaft and a center of gravity G of the shaft is defined as Lg. Lg/Ls is 0.52 or greater and 0.65 or less. A shaft weight is equal to or less than 52 g. Preferably, the shaft 6 has butt partial layers a 5 and a 6 . When a point separated by 250 mm from a butt end Bt is defined as P 2 ; a range from t…
- Who is the assignee on this patent?
- Hasegawa Hiroshi, Nakano Takashi, Sugimoto Yasushi, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification A63B53/10. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Mar 17 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).