Golf club head

Abstract

A golf club head includes a front face having a grooved striking zone for impacting a golf ball, a rear face opposite to said front face, a top portion, a sole portion, a toe portion, a heel portion, a hosel portion having a shaft-receiving bore. The toe portion surface meets the front face along a first edge, and the toe portion extends outwardly from the first edge in a direction away from the hosel portion such that the vertical projection of the toe portion onto a plane containing the front face is substantially located outside of the front face. Besides, the sole surface meets the rear face along a trailing edge and meets the toe portion surface along a second edge, and the angle included between the trailing edge and the second edge is less than 90 degrees.

1 . A golf club head comprising:
 a front face having a grooved striking zone for impacting a golf ball;   a rear face opposite to said front face;   a top portion;   a sole portion;   a toe portion;   a heel portion; and   a hosel portion having a shaft-receiving bore,   wherein the toe portion surface meets said front face along a first edge, and said toe portion extends outwardly from said first edge in a direction away from said hosel portion such that the vertical projection of said toe portion onto a plane containing said front face is substantially located outside of said front face,   wherein the sole surface meets said rear face along a trailing edge and meets said toe portion surface along a second edge, and the angle included between said trailing edge and said second edge is less than 90 degrees.   
     
     
         2 . The golf club head of  claim 1 , wherein the angle included between said trailing edge and said second edge is between 30 and 90 degrees. 
     
     
         3 . The golf club head of  claim 1 , wherein said trailing edge has a central portion indented toward said front face. 
     
     
         4 . The golf club head of  claim 1 , wherein the golf club head has a moment of inertia about a vertical axis between 3000 grams-centimeters squared and 6000 grams-centimeters squared, and said vertical axis passes through the center of gravity of the golf club head and said vertical axis is perpendicular to a ground the golf club head rests on. 
     
     
         5 . The golf club head of  claim 1 , wherein the distance AB between a point A, which is the outmost point of said toe portion as viewed in a front view, and a point B, which is the outermost point of said first edge as viewed in a front view, is at least 4 mm. 
     
     
         6 . The golf club head of  claim 1 , wherein when said sole rests on a ground, a distance AB between a point A, which is a vertical projection point on said ground of the outmost point of said toe portion as viewed in a front view, and a point B, which is a projection point on the ground of the central axis of said shaft-receiving bore, is substantially larger than a distance BC between said point B and a point C, which is a vertical projection point on the ground of the outermost point of said first edge as viewed in a front view. 
     
     
         7 . The golf club head of  claim 1 , wherein said rear face has a cavity indented toward said front face. 
     
     
         8 . An iron type golf club head comprising:
 a front face having a grooved striking zone for impacting a golf ball;   a rear face opposite to said front face;   a top portion;   a sole portion;   a toe portion;   a heel portion; and   a hosel portion having a shaft-receiving bore;   wherein the toe portion surface meets said front face along a first edge and said toe portion extends outwardly from said first edge in a direction away from said hosel portion such that the vertical projection of said toe portion onto a plane containing said front face is substantially located outside of said front face;   wherein the sole surface meets said rear face along a trailing edge and the angle included between said trailing edge and a tangent line drawn tangent to said toe portion at the outmost point of said toe portion as viewed in a top view is less than 90 degrees.   
     
     
         9 . The iron type golf club head of  claim 8 , wherein the angle included between said trailing edge and said tangent line is between 30 and 90 degrees. 
     
     
         10 . The iron type golf club head of  claim 8 , wherein said trailing edge has a central portion indented toward said front face. 
     
     
         11 . The iron type golf club head of  claim 8 , wherein the iron type golf club head has a moment of inertia about a vertical axis between 3000 grams-centimeters squared and 6000 grams-centimeters squared, and said vertical axis passes through the center of gravity of the iron type golf club head and said vertical axis is perpendicular to a ground the iron type golf club head rests on. 
     
     
         12 . The iron type golf club head of  claim 8 , wherein the distance AB between a point A, which is the outmost point of said toe portion as viewed in a front view, and a point B, which is the outermost point of said first edge as viewed in a front view, is at least 4 mm. 
     
     
         13 . The iron type golf club head of  claim 8 , wherein when said sole rests on a ground, a distance AB between a point A, which is a vertical projection point on said ground of the outmost point of said toe portion as viewed in a front view, and a point B, which is a projection point on the ground of the central axis of said shaft-receiving bore, is substantially larger than a distance BC between said point B and a point C, which is a vertical projection point on the ground of the outermost point of said first edge as viewed in a front view. 
     
     
         14 . The iron type golf club head of  claim 8 , wherein said rear face has a cavity indented toward said front face. 
     
     
         15 . An iron type golf club head comprising:
 a front face having a grooved striking zone for impacting a golf ball;   a rear face opposite to said front face;   a top portion;   a sole portion;   a toe portion;   a heel portion; and   a hosel portion having a shaft-receiving bore;   wherein the toe portion surface meets said front face along a first edge, and said toe portion extends outwardly from said first edge in a direction away from said hosel portion such that the vertical projection of said toe portion onto a plane containing said front face is substantially located outside of said front face;   wherein the sole surface meets said rear face along a trailing edge and at least a central portion of said trailing edge is indented toward said front face.   
     
     
         16 . The iron type golf club head of  claim 15 , wherein the iron type golf club head has a moment of inertia about a vertical axis between 3000 grams-centimeters squared and 6000 grams-centimeters squared, and said vertical axis passes through the center of gravity of the iron type golf club head and said vertical axis is perpendicular to a ground the iron type golf club head rests on. 
     
     
         17 . The iron type golf club head of  claim 15 , wherein the distance AB between a point A, which is the outmost point of said toe portion as viewed in a front view, and a point B, which is the outermost point of said first edge as viewed in a front view, is at least 4 mm. 
     
     
         18 . The iron type golf club head of  claim 15 , wherein when said sole rests on a ground, a distance AB between a point A, which is a vertical projection point on said ground of the outmost point of said toe portion as viewed in a front view, and a point B, which is a projection point on the ground of the central axis of said shaft-receiving bore, is substantially larger than a distance BC between said point B and a point C, which is a vertical projection point on the ground of the outermost point of said first edge as viewed in a front view. 
     
     
         19 . The iron type golf club head of  claim 15 , wherein said rear face has a cavity indented toward said front face.