Wood type golf club head
First Claim
1. In a wood type golf club head having a club head body, said body having a toe side, a heel side, a crown on an upper side, a sole on a lower side and a face with a loft angle on a front side thereof, said face having a convex shape with a predetermined radius of curvature in a vertical direction with a plurality of grooves disposed in rows on said face and extending from the toe side to the heel side of said body, the improvement comprising rows of grooves disposed essentially only on a lower side portion of said face while an upper side portion of said face is essentially smooth, said lower side portion lying below and said upper side portion lying above a center line X--X on the face of the club head body that is in a plane coincident with the center of gravity of the club head body and parallel to a horizontal plane Z--Z coincident with the sole of the club head body.
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Accused Products
Abstract
When a plurality of grooves extending from the toe side to the heel side are disposed in a plurality of upper to lower rows in a face of a wood type golf club head, these grooves are disposed on the lower portion side of the face and the upper portion side of the face is slicked without disposing the grooves. This arrangement can make a flying distance of a ball greater than by conventional golf club irrespective of rain or shine.
In place of the construction wherein the upper portion side of the face is slicked, it is possible to employ the construction wherein the gaps between grooves disposed on the upper portion side of the face are greater than those between grooves disposed on the lower portion side, or the construction wherein each width of grooves disposed on the upper portion side of the face is smaller than that of grooves disposed on the lower portion side.
130 Citations
21 Claims
- 1. In a wood type golf club head having a club head body, said body having a toe side, a heel side, a crown on an upper side, a sole on a lower side and a face with a loft angle on a front side thereof, said face having a convex shape with a predetermined radius of curvature in a vertical direction with a plurality of grooves disposed in rows on said face and extending from the toe side to the heel side of said body, the improvement comprising rows of grooves disposed essentially only on a lower side portion of said face while an upper side portion of said face is essentially smooth, said lower side portion lying below and said upper side portion lying above a center line X--X on the face of the club head body that is in a plane coincident with the center of gravity of the club head body and parallel to a horizontal plane Z--Z coincident with the sole of the club head body.
- 9. In a wood type golf club head having a club head body, said body having a toe side, a heel side, a crown on an upper side, a sole on a lower side and a face with a loft angle on a front side thereof, said face having a convex shape with a predetermined radius of curvature in a vertical direction with a plurality of grooves disposed in rows on said face and extending from the toe side to the heel side of said body, the improvement comprising rows of grooves disposed on a lower side portion of said face and rows of grooves disposed on an upper side portion of said face, said lower side portion lying below and said upper side portion lying above a center line X--X on the face of the club head body that is in a plane coincident with the center of gravity of the club head body and parallel to a horizontal plane Z--Z coincident with the sole of the club head body, said rows of grooves being spaced apart a greater distance on said upper side portion than the rows of grooves on said lower side portion.
- 16. In a wood type golf club head having a club head body, said body having a toe side, a heel side, a crown on an upper side, a sole on a lower side thereof and a face with a loft angle on a front side thereof, said face having a convex shape with a predetermined radius of curvature in a vertical direction with a plurality of grooves disposed in rows on said face and extending from the toe side to the heel side of said body, the improvement comprising said grooves of the rows of grooves disposed on an upper side portion of said face being smaller in width than the width of the grooves of the rows of grooves disposed on a lower side portion of said face.
Specification