Back to results
US 7,303,487 B2Granted
Golf club head
AssigneeSRI Sports Limited
InventorTomio Kumamoto
Life of this patent
Estimating the term…
Abstract
A golf club head having face, crown, sole and side portions, and comprising a metal head base body (M) having at least one opening and a cover (FR) arranged in the opening and made of a material having a specific gravity smaller than the base body, wherein when the head is sectioned into head toe side portion (1t) and head heel side portion (1h) by a vertical plane including a normal line drawn from a head center of gravity to a face surface, the surface area of The cover covering a portion of the opening included in the head toe side portion is larger Than the surface area of the cover covering a portion of The opening included in the head heel side portion, and the weight of the head heel side portion (1h) is from 55 to 75% of the entire weight of the head.
Claims10
A golf club head comprising:
- a face portion hitting a ball;
- a crown portion connected to the face portion and forming an upper surface of the head;
- a sole portion connected to said face portion and forming a head bottom surface;
- a side portion extending between said crown portion and said sole portion from a toe of the face portion through a back face to a heel, and
- a neck portion having a shaft insertion hole,
- wherein the golf club head includes a head base body made of a metal material and provided with at least one opening portion, and a cover body arranged in said opening portion and made of a lower specific gravity material having a specific gravity smaller than said metal material, said head base body including said face portion, said neck portion, a crown main wall portion forming a main portion of said crown portion, a sole main wall portion forming a main portion of said sole portion, and a side main wall portion forming a main portion of said side portion,
- wherein said opening portion includes at least one of a crown opening portion open in said crown portion, a side opening portion open in said side portion and a sole opening portion open in said sole portion,
- wherein in a head toe side portion and a head heel side portion obtained by virtually sectioning the head by a vertical surface including a normal line drawn from the center of gravity of the head to the face surface in a standard state of being mounted on a horizontal surface at prescribed lie angle and loft angle, a surface area St of a portion of said cover body closing a portion of said opening portion which is located in said head toe side portion is made larger than a surface area Sh of the remaining portion of said cover body closing a portion of said opening portion which is located in said head heel side portion, and a weight Wh of the head heel side portion is set to 55 to 75% of the entire weight of the head, and
- wherein the shortest distance from the head's center of gravity to the axial center line of said shaft insertion hole is from 20 to 45 mm.
6 more elements
A golf club head comprising:
- a head base body including a face portion hitting a ball, a crown portion connected to said face portion and forming an upper surface of the head, a sole portion connected to said face portion and forming a head bottom surface, a side portion extending between said crown portion and said sole portion from a toe of said face portion through a back face to a heel, and a neck portion having a shaft insertion hole, and having at least one opening portion fonned in at least one of said crown portion, said side portion and said sole portion;
- and
- a cover body arranged in said opening portion,
- wherein said head base body is made of a metal material, and said cover body is made of a composite material having a specific gravity smaller than said metal material and comprising a matrix resin and a fiber as a reinforcing material having an elastic modulus of 200 to 460 GPa,
- wherein in a head toe side portion and a head heel side portion obtained by virtually sectioning the head by a vertical surface including a normal line drawn from the head's center of gravity to the face surface in a standard state of being placed on a horizontal surface at prescribed lie angle and loft angle, the surface area St of a portion of said cover body closing a portion of said opening portion which is located in said head toe side portion is larger than the surface area Sh of the remaining portion of said cover body closing a portion of said opening portion which is located in said head heel side portion, and the weight Wh of the head heel side portion is from 55 to 75% of the entire weight of the head, and
- wherein the shortest distance from the head's center of gravity to the axial center line of said shaft insertion hole is from 20 to 45 mm.
3 more elements
A golf club head comprising:
- a face portion hitting a ball;
- a crown portion connected to the face portion and forming an upper surface of the head;
- a sole portion connected to said face portion and forming a head bottom surface;
- and
- a side portion extending between said crown portion and said sole portion from a toe of the face portion through a back face to a heel,
- wherein the golf club head includes a head base body made of a metal material and provided with at least one opening portion, and a cover body arranged in said opening portion and made of a lower specific gravity material having a specific gravity smaller than said metal material,
- wherein said opening portion includes at least one of a crown opening portion open in said crown portion, a side opening portion open in said side portion and a sole opening portion open in said sole portion,
- wherein in a head toe side portion and a head heel side portion obtained by virtually sectioning the head by a vertical surface including a normal line drawn from the head's center of gravity to the face surface in a standard state of being mounted on a horizontal surface at prescribed lie angle and loft angle, a surface area St of a portion of said cover body closing a portion of said opening portion which is located in said head toe side portion is larger than a surface area Sh of the remaining portion of said cover body closing a portion of said opening portion which is located in said head heel side portion, and a weight Wh of the head heel side portion is set to 55 to 75% of the entire weight of the head, and
- wherein said at least one opening portion is formed so that said crown opening portion, said side opening portion and said sole opening portion are connected to form a single opening extending from said crown portion to said sole portion across said side portion on a rear side of the head.
6 more elements
Dependencies are inferred from the claim text.