Driving range balls typically weigh 35-40 grams in the standard 1.68 inch size and do not travel nearly as far as the standard balls. Balls popularly known as "Cayman" balls weigh 20-35 grams and are designed to travel a short distance at any club impact rate, including 100 mph or greater. There are lighter weight balls, but they are designed for short distance usage.
#DUNLOP GOLF COVERS DRIVER#
However, such beliefs have been based upon the play of excellent players, usually at the professional level, who have club impact rates (with the driver club) of 100 m.p.h. It has been generally believed that the heavier the ball and smaller the size, the greater the range or distance performance of the ball. The United States Golf Association (USGA) approves golf balls having a maximum weight of 45.93 grams and a minimum diameter of 1.68 inches. This invention relates to golf balls, and is directed more particularly to a golf ball providing increased range when hit at slow to moderate club head velocities. Said ball thereby having a relatively soft cover to exhibit a soft "feel" when hit by a club head at a velocity of 70-95 mph, but exhibiting no higher spin rate than balls weighing 45.0-45.93 grams and having covers of Shore D hardness of 68-70. The golf ball in accordance with claim 13 wherein said center portion weighs 13.0-16.5 grams.Ī cover having a Shore D hardness of 40-65 The golf ball in accordance with claim 9 wherein said ball is a three-piece ball having a center portion, a windings portion, and a cover portion, said center portion having a diameter of 1.0-1.25 inches.ġ4.
The golf ball in accordance with claim 11 wherein said core weighs 31-32.5 grams.ġ3. The golf ball in accordance with claim 10 wherein said core portion is provided with a specific gravity of 1.04-1.07.ġ2. The golf ball in accordance with claim 9 wherein a core portion of said ball is provided with a diameter of 1.51 inch.ġ1. Said ball exhibiting further distance performance when hit at club head velocities of 80-90 mph than do heavier balls having said diameter.ġ0. The golf ball in accordance with claim 7 wherein said initial ball velocity is 253.6-254.3 ft./sec.Ī coefficient of restitution of 0.725-0.732 Īn initial velocity of 253.6-254.3 ft./sec. The golf ball in accordance with claim 4 wherein said ball exhibits an initial ball velocity of less than 255 ft./sec.Ĩ. The golf ball in accordance with claim 4 wherein said ball is provided with dimples thereon occupying a volume of about 400 mm 3 and about 85% of the surface area of said ball.ħ. The golf ball in accordance with claim 4 wherein said coefficient of restitution is 0.725-0.732.Ħ. The golf ball in accordance with claim 3 wherein said ball exhibits a coefficient of restitution of no more than 0.735.ĥ. The golf ball in accordance with claim 1 wherein said core weighs 31-32.5 grams.Ĥ.
The golf ball in accordance with claim 1 wherein said core is molded and is provided with a diameter of 1.495-1.515 inches.ģ. Said cover having a Shore D hardness of 40-65.Ģ. Said cover having a specific gravity of 0.90-0.98 and Said core having a specific gravity of 1.01-1.09 A two-piece golf ball having a core and a cover, said ball having
Having thus described my invention, what IĬlaim as new and desire to secure by Letters Patent of theġ.