Patent ID: 6793588
Filing Date: 2004-09-21
Classification: A63B

Abstract:
A putter comprising:a club head comprising a face portion having a recess with a face insert disposed therein; a sole portion extending rearward from the face portion, the sole portion having an internal surface and an external surface, the internal surface of the sole having a visible heel section and a visible toe section, an aft mass portion rearward from the face portion a distance of between 2.5 inches to 4.5 inches, a crown portion extending rearward from the face portion, the crown portion having a central elongated section extending over the aft mass portion and a forward section having a width from a heel end of the face portion to a toe end of the face portion from between 3.0 inches to 5.0 inches, the forward section having a width greater than a width of the central elongated portion; and a shaft connected to the club head; wherein the putter has a swing static imbalance, Sy, greater than 500 grams-centimeter, the swing static imbalance defined as the product of the putter mass and the offset distance of the center of gravity of the club head behind the golfer's hands along the target direction.