Patent ID: 7651411

Claim:
A golf putter head comprising: a face member arranged for impacting a golf ball, the face member having a heel end and a toe end; a first rear mass located substantially rearward of the heel end; a second rear mass located substantially rearward of the toe end; upper and lower arms extending rearwardly from the face member connecting the face member to the first rear mass and to the second rear mass; a cavity defined between the upper and lower arms; an opening to the cavity at a rear of the golf putter head, the opening being bounded by a cross sectional area of the cavity, where the cross sectional area extends from the first rear mass to the second rear mass, and the opening being located between and extending without interruption between the first and second rear masses; and two additional openings to the cavity, one of the additional openings being located between and extending without interruption between the first rear mass and the face member, and the other additional opening being located between and extending without interruption between the second rear mass and the face member.