Hollow golf club head
AssigneeDunlop Sports Co. Ltd.
InventorsNaruhiro MIZUTANI, Daisuke KOHNO
Life of this patent
Estimating the term…
Abstract
A sole 6 of a head 2 includes a groove 20 extending from a toe side to a heel side. The groove 20 includes a center groove part 20c, a toe groove part 20t, and a heel groove part 20h. A toe boundary line kt is formed on a boundary between the center groove part 20c and the toe groove part 20t due to the change of a groove depth D. A heel boundary line kh is formed on a boundary between the center groove part 20c and the heel groove part 20h due to the change of the groove depth D. The toe groove part 20t and the heel groove part 20h extend so as to be inclined with respect to a face-back direction. The head 2 is a hollow golf club head.
Claims15
A hollow golf club head comprising:
- a face;
- and
- a sole,
- wherein:
- the sole includes a groove extending from a toe side to a heel side and having a changing groove depth;
- the groove includes a center groove part, a toe groove part located on the toe side with respect to the center groove part, and a heel groove part located on the heel side with respect to the center groove part;
- a toe boundary line is formed on a boundary between the center groove part and the toe groove part due to the change of the groove depth;
- a heel boundary line is formed on a boundary between the center groove part and the heel groove part due to the change of the groove depth;
- and
- the toe boundary line and the heel boundary line extend so as to be inclined with respect to a face-back direction.
A hollow golf club head comprising:
- a face;
- and
- a sole,
- wherein:
- the sole includes:
- a center groove-free part;
- a toe groove adjoining a toe side of the center groove-free part and extending from the toe side to a heel side;
- and a heel groove adjoining the heel side of the center groove-free part and extending from the toe side to the heel side;
- a toe boundary line is formed on a boundary between the center groove-free part and the toe groove;
- a heel boundary line is formed on a boundary between the center groove-free part and the heel groove;
- and
- the toe boundary line and the heel boundary line extend so as to be inclined with respect to a face-back direction.
A hollow golf club head comprising:
- a face;
- and
- a sole,
- wherein:
- the sole includes:
- a center groove extending from a toe side to a heel side;
- a toe groove-free part adjoining the toe side of the center groove;
- and a heel groove-free part adjoining the heel side of the center groove;
- and
- a toe boundary line is formed on a boundary between the center groove and the toe groove-free part;
- a heel boundary line is formed on a boundary between the center groove and the heel groove-free part;
- and
- the toe boundary line and the heel boundary line extend so as to be inclined with respect to a face-back direction.
Dependencies are inferred from the claim text.