Metal wood type golf club head with integral upper internal weighted mass

Claim 1

A metal wood type golf club head formed of a hollow interior metal shell having inner and outer wall surfaces and a first wall thickness, said club head including a hosel, heel, toe, upper surface, rear surface, ball striking face with a center of percussion thereon wherein the improvement comprises: an elongated mass integrally formed with said inner wall surface and under said upper surface and extending beyond said inner wall surface into the interior of said metal shell, said elongated mass located between a point adjacent said ball striking face and a second point adjacent said rear surface in a front to rear direction; said elongated means and said metal shell having a second thickness at least twice the thickness of said first wall thickness, said elongated mass centrally disposed relative to the ball striking face between said heel and said toe; said elongated mass positioning the center of gravity of said club head in a direction toward said upper surface and above and behind said center of percussion on said ball striking face.