Golf club
First Claim
1. A golf club comprising a head, a shaft and a grip,wherein an elastic member is attached to an external surface of the shaft,the elastic member is ring-shaped and has no end,the elastic member is externally fitted on the shaft in a state in which an elastic contracting force is maintained,the elastic member can be elastically deformed in such a manner that an inside diameter thereof is greater than the maximum outside diameter of the grip,an area ratio (S2/S1) of a sectional area S2 of a hollow portion of the elastic member to a sectional area S1 of the finest portion of the shaft is equal to or higher than 0.80 and equal to or lower than 1.1, andthe elastic member can be freely attached to and removed from an assembled club, wherein concavo-convex portions are provided on an internal surface of the elastic member.
1 Assignment
0 Petitions
Accused Products
Abstract
A golf club (2) includes a head (4), a shaft (6) and a grip (8). An elastic member (10) is attached to an external surface of the shaft (6). The elastic member (10) is ring-shaped and has no end. The elastic member (10) is externally fitted in the shaft (6) in a state in which an elastic contracting force is maintained. It is preferable that a fastening member for fastening the elastic member (10) from an outside should be provided. The fastening member is constituted to enable a mutual transition of a fastening state in which the elastic member is fastened and a removing state in which the fastening member is removed from the elastic member and is also removed from the golf club. It is preferable that the fastening member should be provided in no contact with the shaft (6) in the fastening state.
15 Citations
5 Claims
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1. A golf club comprising a head, a shaft and a grip,
wherein an elastic member is attached to an external surface of the shaft, the elastic member is ring-shaped and has no end, the elastic member is externally fitted on the shaft in a state in which an elastic contracting force is maintained, the elastic member can be elastically deformed in such a manner that an inside diameter thereof is greater than the maximum outside diameter of the grip, an area ratio (S2/S1) of a sectional area S2 of a hollow portion of the elastic member to a sectional area S1 of the finest portion of the shaft is equal to or higher than 0.80 and equal to or lower than 1.1, and the elastic member can be freely attached to and removed from an assembled club, wherein concavo-convex portions are provided on an internal surface of the elastic member.
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5. A golf club comprising a head, a shaft, a grip, an elastic member and a fastening member, wherein
the elastic member is attached to an external surface of the shaft, the elastic member is ring-shaped and has no end, the elastic member is externally fitted on the shaft in a state in which an elastic contracting force is maintained; -
the fastening member fastens the elastic member from the outside, the fastening member is constituted to enable a mutual transition of a fastening state in which the elastic member is fastened and a removing state in which the fastening member is removed from the elastic member and is also removed from the golf club, the fastening member is not in contact with the shaft in the fastening state; and a complex elastic modulus of the elastic member is equal to or higher than 1.4×
107 (dyn/cm2) and is equal to or lower than 2.0×
1010 (dyn/cm2),wherein the elastic member can be elastically deformed in such a manner that an inside diameter thereof is greater than the maximum outside diameter of the grip, wherein the elastic member can be freely attached to and removed from an assembled club.
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Specification