Patent ID: 8690710

Claim:
A golf club head comprising: a head body comprising: a front face; and a back portion comprising: heel region; a toe region; a center region between the heel and toe regions; a back end extended between the heel and toe regions; and a cavity comprising: a cavity heel zone; a cavity toe zone; a cavity center zone between the cavity heel and toe zones; a cavity inner section comprising a cavity inner wall located towards the front face; a cavity outer section comprising a cavity outer wall located towards the back end; a cavity heel end wall at a heel end of the cavity; and a cavity toe end wall at a toe end of the cavity; and an insert configured to be at least partially housed in the cavity and comprising: an insert heel zone; an insert toe zone; and an insert center zone; wherein: the insert is in direct contact with the cavity inner wall when at least partially housed in the cavity; the head body comprises a single piece having the front face and the back portion; a density of the head body is greater than a density of the insert; the cavity is wider at the cavity center zone, in a direction from the front face toward the back portion, than at the cavity heel and toe zones; the cavity inner wall comprises: a cavity inner wall centerpoint at the cavity center zone; a cavity inner wall heel end at the cavity heel zone; a cavity inner wall toe end at the cavity toe zone; a cavity heel-ward inner segment measured from the cavity inner wall centerpoint to the cavity inner wall heel end; and a cavity toe-ward inner segment measured from the cavity inner wall centerpoint to the cavity inner wall toe end; this cavity outer wall comprises: a cavity outer wall heel end at the cavity heel zone; and a cavity outer wall toe end at the cavity toe zone; a center face-to-inner-cavity distance comprises a shortest path from the front face to the cavity inner wall centerpoint; a heel-side face-to-inner-cavity distance comprises a shortest path from the front face to a midpoint of the cavity heel-ward inner segment; a toe-side face-to-inner-cavity distance comprises a shortest path from the front face and to a midpoint of the cavity toe-ward inner segment; the heel-side face-to-inner-cavity distance and the toe-side face-to-inner-cavity distance are greater than the center face-to-inner-cavity distance; the insert comprises an insert inner wall complementary to the cavity inner wall; the cavity heel-ward inner segment of the cavity inner wall is substantially straight; the cavity toe-ward inner segment of the cavity inner wall is substantially straight; the cavity heel-ward inner segment and the cavity toe-ward inner segment intersect at the cavity inner wall centerpoint; a first angle from the cavity heel-ward inner segment to the cavity toe-ward inner segment is obtuse; the cavity heel end wall separates the cavity inner wall heel end away from the cavity outer wall heel end; and the cavity toe end wall separates the cavity inner wall toe end away from the cavity outer wall toe end.