Metal wood club

Abstract

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 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 at least along the z-axis and the y-axis.   
     
     
         2 . The golf club head of  claim 1 , wherein the center of gravity is movable within a 6 mm distance along the z-axis. 
     
     
         3 . The golf club head of  claim 2 , wherein the center of gravity is movable within a 4 mm distance along the z-axis. 
     
     
         4 . The golf club head of  claim 1 , wherein the center of gravity is movable within a 6 mm distance along the y-axis. 
     
     
         5 . The golf club head of  claim 4 , wherein the center of gravity is movable within a 2 mm distance along the y-axis. 
     
     
         6 . The golf club head of  claim 1 , wherein the center of gravity is movable within a 2 mm distance along the x-axis. 
     
     
         7 . The golf club head of  claim 6 , wherein the center of gravity is movable within a 0.5 mm distance along the x-axis. 
     
     
         8 . The golf club head of  claim 1 , weight system further comprising at least one tube for placement within the club head and within a plane formed by the y axis and z axis to adjust the center of gravity. 
     
     
         9 . The golf club head of  claim 8 , wherein multiple inserts varying in weight may be placed within the tube at various positions to move the center of gravity to the desired location. 
     
     
         10 . The golf club head of  claim 8 , wherein a weight is provided at one end of the tube, and wherein the tube is placed within the club head to move the center of gravity to the desired location for a desired ball flight. 
     
     
         11 . The golf club head of  claim 8 , wherein the tube is angled downward toward the face of the club head by at least 3 degrees from the z-axis. 
     
     
         12 . The golf club head of  claim 11 , wherein the tube is angled downward toward the face of the club head by about 3 to about 7 degrees. 
     
     
         13 . The golf club head of  claim 10 , wherein the tube is flippable, such that the weight is moveable to the other end of the club head to move the center of gravity for a desired different ball flight. 
     
     
         14 . The golf club head of  claim 10 , wherein when the weight is located at a back of the club head, a shot hit off the club head has increased backspin and a higher launch angle resulting in a softer landing. 
     
     
         15 . The golf club head of  claim 10 , wherein when the weight is located at a front of the club head a shot hit off the club head has less backspin and a lower trajectory resulting in a shallower landing for increased distance. 
     
     
         16 . The golf club head of  claim 10 , wherein the weight comprises tungsten. 
     
     
         17 . The golf club head of  claim 16 , wherein the weight has a mass from about 10 grams to about 35 grams. 
     
     
         18 . The golf club head of  claim 10 , wherein the tube and weight combine to have a mass of about 20 to about 40 grams. 
     
     
         19 . The golf club head of  claim 8 , wherein the tube comprises aluminum. 
     
     
         20 . The golf club head of  claim 8 , wherein the tube includes a fastener on at least one end to assist in fastening the tube in the club head. 
     
     
         21 . The golf club head of  claim 20 , wherein the tube is fastened to the inside of the club head adjacent the face. 
     
     
         22 . The golf club head of  claim 20 , wherein the tube is fastened to the outside of the club head substantially flush with the club head body. 
     
     
         23 . The golf club head of  claim 1 , the weight system further comprising:
 three cavities provided in the club head; and   three separate inserts provided for placement within the cavities,   
       wherein the inserts have a different mass and may be placed in different cavities to move the center of gravity within the coordinate system. 
     
     
         24 . The golf club head of  claim 1 , further comprising a pipe for placement within the club head to adjust the center of gravity. 
     
     
         25 . The golf club head of  claim 24 , wherein at least one weight is slidably provided on the pipe to move the center of gravity to the desired location. 
     
     
         26 . The golf club head of  claim 25 , wherein the slidable weight may be moved along the shaft to the desired location manually from outside of the club head. 
     
     
         27 . The golf club head of  claim 24 , wherein the pipe is angled downward toward the face of the club head by at least 3 degrees from the z-axis. 
     
     
         28 . The golf club head of  claim 27 , wherein the pipe is angled downward toward the face of the club head by about 3 to about 7 degrees.