Practice golf ball
AssigneeYoichi Kawamura
InventorTieko Minami
Life of this patent
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Abstract
A spherical structure constituting a practice golf ball and integrally formed of a tough synthetic resin has a polar axis and has: a circular equatorial vane perpendicular to the polar axis; a tubular hub disposed coaxially around the polar axis; a plurality of meridian vanes of substantially semicircular shape joined at their chordal parts to the hub part and spaced at equal angular intervals; and a middle band engirdling the spherical structure around the circumference of the equatorial vane, the semicircular outer edges of the meridian vanes and the middle band forming the outer spherical contour of the practice golf ball.
Claims5
A golf ball for practice constituted by a spherical structure having a polar axis and made of an elastic tough material, said spherical structure comprising, in integrally formed state:
- a circular equatorial vane lying in an equatorial plane perpendicular to the polar axis;
- a hub part disposed coaxially relative to the polar axis and extending between opposite outer sides of the spherical structure;
- a plurality of meridian vanes of substantially semicircular planar shape lying in respective meridian planes spaced at equal angular intervals and mutually intersecting at the polar axis, the meridian vanes being integrally joined at their chordal parts to the hub part;
- and a middle band of a specific width engirdling the spherical structure around the circumference of the equatorial vane, the semicircular outer edges of the meridian vanes and the middle band forming the outer spherical contour of the golf ball.
Dependencies are inferred from the claim text.