Patent ID: 7278924
Filing Date: 2007-10-09
Classification: A63B

Abstract:
1. A method comprising the steps of locating a toroid on a putting surface, the toroid comprised of inner and outer surfaces, the toroid also comprised of a first edge on the outer surface; putting a golf ball so that it rolls and contacts the first edge and the outer surface, next rolls over the first edge, next rolls over the inner surface, and next rolls into the toroid; and wherein the inner and outer surfaces have substantially the same shape; wherein the inner and outer surfaces of the toroid are curved; wherein the inner and outer surfaces of the toroid are curved so that the inner surface has a semicircular shape and the outer surface has a semicircular shape and together the inner and outer surfaces for a circular cross section for the toroid; and wherein the circular cross section for the toroid is about 0.25 inches.