Patent ID: 8277339

Claim:
A ball rolling device comprising: a pair of ball support structures secured together and spaced apart so as to support a golf ball there between, each of the ball support structures having: a first portion having a first end and a second end having a first surface with a clothoid shape; and a second portion having a first end coupled to the second end of said first portion and a second end, said second portion having a first surface having an arc shape; and a third portion having a first end coupled to the second end of said second portion and having a second end, said third portion having a first surface having an inverted clothoid shape, wherein for η=the length of arc; a curvature of the first surface of said first portion is defined by ρ 1 =πη 1 ; a curvature of the first surface of said second portion is defined by ρ 2 =1/R; and a curvature of the first surface of said third portion is defined by ρ 3 =πη 3 .