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US 2019/0168088 A1Published application
Golf club with grooved striking face
AssigneeDunlop Sports Co. Ltd.
InventorsMika BECKTOR, Jacob LAMBETH
Life of this patent
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Abstract
A golf club is disclosed that has a golf club head with a face having peaks or ridges and deep grooves or valleys. The deep grooves or valleys promote improved “feel” and/or reduced “smash factor” which may be particularly desirable when the golf club head comprises a putter face. The deep grooves or valleys may eliminate the need for costly soft metal alloy faces and/or polymeric or other resilient inserts between the face and the body of the golf club head.
Claims20
A putter-type golf club head comprising:
- a heel portion;
- a toe portion opposite the heel portion;
- a sole;
- a topline opposite the sole;
- and
- a striking face that, in a measurement region defining a virtual square with sides of 0.5 inch that is centered about a face center, includes:
- a plurality of grooves forming therebetween a plurality of four-sided projections, each of the plurality of grooves having a depth of about 0.010-0.018 inch;
- a ratio Spk/Sk that is greater than a ratio Svk/Sk;
- and
- a ratio Spk/Svk that is greater than 200.
7 more elements
A putter-type golf club head comprising:
- a heel portion;
- a toe portion opposite the heel portion;
- a sole;
- a topline opposite the sole;
- and
- a striking face comprising:
- a plurality of diamond-shaped projections;
- a first groove pattern comprising a plurality of first grooves;
- and
- a second groove pattern comprising a plurality of second grooves,
- wherein the second groove pattern is substantially a mirror image of the first groove pattern and overlaid onto the first groove pattern,
- wherein each of the plurality of first grooves and second grooves have a depth of 0.010-0.018 inch and the first groove pattern and the second groove pattern each has a pitch of about 2 mm.
9 more elements
A putter-type golf club head comprising:
- a heel portion;
- a toe portion opposite the heel portion;
- a sole;
- a topline opposite the sole;
- and
- a striking face that, in a measurement region comprising a square with sides of 0.5 inch, comprises:
- a first groove pattern comprising a plurality of first grooves;
- a second groove pattern comprising a plurality of second grooves, the second groove pattern being substantially a mirror image of the first groove pattern;
- a plurality of four-sided projections formed at intersecting regions of the first grooves and second grooves;
- and
- a ratio Spk/Svk of the measurement region that is greater than 700.
8 more elements
Dependencies are inferred from the claim text.