GOLF CLUB AND METHOD OF ADJUSTING PROPERTIES THEREOF

• US 20110250984A1
• Filed: 04/06/2011
• Published: 10/13/2011
• Est. Priority Date: 04/08/2010
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: SATO, Fumiaki
• Granted Patent: US 8,636,606 B2
• Time in Patent Office: Days
• US Class Current: 473/307
• CPC Class Codes: A63B 2209/00 Characteristics of used materials
• CPC Class Codes: A63B 53/02 Joint structures between the head and the shaft
• CPC Class Codes: A63B 53/023 adjustable angular orientation
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence
• CPC Class Codes: A63B 60/24 Weighted handles
• CPC Class Codes: Y10T 29/49721 with disassembling

Abstract

A golf club includes: a hosel of a head to which a leading end of a shaft is attached; a weight material for adjusting weight being provided in a lower end portion of a hosel hole; and a communication opening which communicates the lower end portion of the hosel hole with an inside of the head, wherein the weight material is detachably screwed into the communication opening.

Claims

1. A golf club comprising:

a hosel of a head to which a leading end of a shaft is attached;

a weight material for adjusting weight being provided in a lower end portion of a hosel hole; and

a communication opening which communicates the lower end portion of the hosel hole with an inside of the head, wherein

the weight material is detachably screwed into the communication opening.

2. The golf club according to claim 1, wherein:

the leading end of the shaft is inserted into and bonded to a shaft inserting hole of a substantially cylindrical shaft case including the shaft inserting hole;

the shaft case is inserted into the hosel hole;

an axial center of the shaft inserting hole is obliquely directed with respect to an axial center of the hosel hole;

the shaft case is fixed to the hosel with a ring-shaped screw member which fits onto the shaft case and is detachably screwed into the hosel on the upper end side;

the screw member is arranged in an outer circumference of the shaft case in the non-contact state with respect to the shaft; and

at least a part of an inner circumferential surface of the hosel hole and at least a part of the outer circumferential surface of the shaft case respectively have a sectional shape in the direction perpendicular to the axial center line, which is a multiangular shape with 3 or more sides.

3. The golf club according to claim 2, wherein:

a convex portion is provided on the outer circumferential surface of the shaft case in the middle of its axial center line direction;

a female screw is carved on the inner circumferential surface of the hosel hole on the upper end side;

a male screw is provided on the outer circumferential surface of the screw member;

the screw member is fixed to the hosel hole by screwing the male screw into the female screw of the hosel hole; and

the shaft case is fixed by pressing the convex portion downward by the lower end surface of the screw member.

4. The golf club according to claim 2, wherein

an elastic body is interposed on the lower side of the screw member.

5. The golf club according to claim 2, wherein

the shaft is inserted into the shaft inserting hole of the shaft case and bonded with adhesive.

6. The golf club according to claim 2, wherein

a lower end side of the shaft case has a tapered multiangular sectional shape.

7. The golf club according to claim 2, wherein

the elastic body is interposed between a lower end side of the shaft case and an inner surface of the hosel hole.

8. The golf club according to claim 1, wherein

agglutinant supplied through the communication opening is adhered to a part of the inner surface of the head.

9. A method of adjusting the properties of a golf club including:

a hosel of a head to which a leading end of a shaft is attached;

a weight material for adjusting weight being provided in a lower end portion of a hosel hole; and

a communication opening which communicates the lower end portion of the hosel hole with an inside of the head, wherein;

the weight material is detachably screwed into the communication opening;

the leading end of the shaft is inserted into and bonded to a shaft inserting hole of a substantially cylindrical shaft case including the shaft inserting hole;

the shaft case is inserted into the hosel hole;

an axial center of the shaft inserting hole is obliquely directed with respect to an axial center of the hosel hole;

the shaft case is fixed to the hosel with a ring-shaped screw member which fits onto the shaft case and is detachably screwed into the hosel on the upper end side;

the screw member is arranged in an outer circumference of the shaft case in the non-contact state with respect to the shaft; and

at least a part of an inner circumferential surface of the hosel hole and at least a part of the outer circumferential surface of the shaft case respectively have a sectional shape in the direction perpendicular to the axial center line, which is a multiangular shape with 3 or more sides, the method comprising;

rotating a shaft case about its axial center to change the direction after the screw member is rotated and detached; and

fixing the shaft case to the hosel hole thereafter by screwing the screw member into the hosel hole.

10. The method according to claim 9, wherein

the weight material is replaced with another weight material with different weight or detached.