We take a stop over today to look at our good friend at the Golf Patents Blog . With the recent regulations on grooves passed down by the USGA – club companies are getting creative when it comes to grooves. Although these new patents from Bridgestone are interesting,I'd be curious if they are simply a marketing ploy – would these mini grooves really impart more spin on your shots? Would they even make contact with the ball? What do you think?
First, the patent issued as USPN 7,594,863 titled “Golf Club Head,” which explains the invention as:
A golf club head of this invention includes a face, a plurality of score line grooves formed on the face, and a plurality of striations formed on the face. The angle formed by an arrangement direction of the plurality of striations and the score line grooves is between 40 degrees and 70 degrees, inclusive, as viewed clockwise from a toe side end of the score line grooves. The following drawings do a good job of explaining the invention.
Second, the patent application published as US Pub. No. 20090247318 titled “Golf Club Head,” which explains the invention as:
This invention provides a golf club head including a plurality of score lines on the face. The golf club head includes a plurality of striations formed on the face and extending from a toe side to a heel side. The cross-sectional shape of each of the striations is a triangle asymmetric with regard to a virtual center line in the width direction, and the smallest interior angle among three interior angles of the triangle is placed at the sole side of the golf club head. A depth D from the face to the deepest portion of each of the striation satisfies 10 micrometers ≤ D ≤ 40 micrometers.
[0008] It is an object of the present invention to provide a golf club head which can provide the higher backspin amount while suppressing damage to a ball.
[0009] According to the present invention, there is provided a golf club head including a plurality of score lines on a face, comprising a plurality of striations formed on the face and extending from a toe side to a heel side, wherein a cross-sectional shape of each striation is a triangle asymmetric with regard to a virtual center line in a width direction, the smallest interior angle among three interior angles of the triangle being placed at a sole side of the golf club head, and a depth D from the face to the deepest portion of each striation satisfies 10 micrometers <40 micrometers.
Thanks again Golf-patents.com