Patent ID: 6951517

Claim:
A putter-head having a centre of mass located at a distance p millimeters behind its impact-face at a height h c millimeters above the bottom of the head, a moment of inertia/kilogrammes-millimeters 2 about the vertical axis through the centre of mass, a mass of M kilogrammes and a radius of gyration of K millimeters about the heel-toe axis of the head through the centre of mass, wherein: (a) p/l is not more than 0.18; (b) h c is less than [12−p×sin(α 12 )] where α 12 is the loft angle at a height of 12 millimeters above the bottom of the head; and (c) a parameter G defined by: G=p +(3.2+70 ×M )× K 2 /p has a value less than 350.