Metal Wood Club
A golf club head is provided with a body that has an address position with a zero degree bounce portion on the sole and a center sole position with a multi-relief surface of the sole having a negative bounce portion. The negative bounce portion may comprise a negative 0.5 to a negative 4.0 degree surface. In one embodiment, the multi-relief surface may comprise the negative bounce portion and a cutaway portion extending to the back of the sole, which may have a depth of about 0.05 to 0.5 inch from a regular sole surface. In another embodiment, the golf club head includes a weight system to adjust the center of gravity. In one embodiment, the weight system is a tube having a weight at one end that may be inserted into the golf club head to move the center of gravity at least forward and backward within 6 mm and up and down within 6 mm. Preferably, the tube is angled downward toward the face by at least 3 degrees.
1 . A golf club head, the golf club head comprising: a body having a face, a sole, a crown, and a skirt joining the face, sole and crown, the body having a center of gravity;
the body having a coordinate system with an x-axis located horizontal to the club face, a y-axis located vertical to the club face, and a z-axis located through the club face,
a weight system for the club head, wherein the center of gravity is adjustable along the y-axis depending on the orientation of the weight system; and
wherein the weight system further comprises;
a vertical cavity, extending from the sole into a hollow volume of the golf club head;
a cylindrical weight member having a heavy end and a lighter end, adapted to be positioned within the cavity;
wherein an external surface of the weight member is not threaded.
2 . The golf club head of claim 1 , wherein the center of gravity is only adjustable along the y-axis.
3 . The golf club head of claim 1 , wherein the weight is secured in the cavity using an epoxy.
4 . The golf club head of claim 1 , wherein the weight is secured in the cavity using a mechanical lock.
5 . The golf club head of claim 1 , wherein the cylindrical weigh member is secured in the cavity using a threaded engagement.
6 . The golf club head of claim 5 , wherein the cylindrical weight member does not form any part of the threaded engagement.
7 . The golf club head of claim 6 , wherein the threaded engagement is a cap type fastener.
8 . The golf club head of claim 7 , wherein the center of gravity is movable within 6 mm distance along the y-axis.
9 . The golf club head of claim 8 , wherein the center of gravity is movable within 12 mm distance along the y-axis.
10 . The golf club head of claim 1 , wherein the insertion of the cylindrical weight member into the vertical cavity is bi-directional.
11 . A golf club head, the golf club head comprising:
a body having a face, a sole, a crown, and a skirt joining the face, sole and crown, the body having a center of gravity;
the body having a coordinate system with an x-axis located horizontal to the club face, a y-axis located vertical to the club face, and a z-axis located through the club face,
and a weight system further comprising;
a vertical cavity, extending from the sole into a hollow volume of the golf club head;
a cylindrical weight member having a heavy end and a lighter end, adapted to be positioned within the cavity;
wherein an entirety of an external surface of the weight member is not threaded.
12 . The golf club head of claim 11 , wherein the cylindrical weigh member is secured in the cavity using a threaded engagement.
13 . The golf club head of claim 12 , wherein the cylindrical weight member does not form any part of the threaded engagement.
14 . The golf club head of claim 13 , wherein the threaded engagement is a cap type fastener.
15 . The golf club head of claim 14 , wherein the cylindrical weight member is flippable, such that the heavy end and the light end may alternate positions to affect the center of gravity of the golf club head.
16 . The golf club head of claim 15 , wherein the center of gravity is movable within 6 mm distance along the y-axis.
17 . The golf club head of claim 16 , wherein the center of gravity is movable within 12 mm distance along the y-axis.