Grooved golf ball

• US 4,284,276 A
• Filed: 02/13/1980
• Issued: 08/18/1981
• Est. Priority Date: 02/13/1980
• Status: Expired due to Term

• Current Assignee: Joseph C. Worst
• Original Assignee: Joseph C. Worst
• Inventors: Worst, Joseph C.
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US06/121,030
• Time in Patent Office: 552 Days
• Field of Search: 273/232, 273/62, 273/213, 273/233, 273/183 C
• US Class Current: 473/383
• CPC Class Codes: A63B 37/0004 Surface depressions or protrusions
• CPC Class Codes: A63B 37/0006 Arrangement or layout of dimples
• CPC Class Codes: A63B 37/0009 Polygonal
• CPC Class Codes: A63B 37/0011 Grooves or lines
• CPC Class Codes: A63B 37/0018 Specified number of dimples
• CPC Class Codes: A63B 37/0021 Occupation ratio, i.e. percentage surface occupied by dimples
• CPC Class Codes: A63B 37/0074 Two piece balls, i.e. cover and core

Abstract

A golf ball is shown with an outer surface that is substantially covered with a plurality of spaced dimples that give the ball a suitable long and predictable flight pattern for wood or iron shots due to imparting an increased lift to the ball when the ball is given a backspin. Several modifications of the invention are shown. One or more elongated grooves are formed on the outer surface of the ball for interlocking with grooves that are formed in the face of a golf club so as to increase the grip as well as achieve more "hang time" for a given amount of backspin of the ball. Another modification has a cluster of grooves that is spaced about 90° from the manufacturer'"'"'s brand name indicia that is marked on the ball. The preferred modification has a continuous band of grooves that encircles the ball and increases the amount of backspin the ball will have leaving the tee which will improve the trajectory or "hang time" of the driven ball. Moreover, the use of the grooves improve the aerodynamics of the ball in flight by causing more air turbulence and thereby increasing the lift of the ball.

Claims

1. A golf ball in the shape of a sphere having in its outer surface a plurality of spaced dimples which substantially cover the outer surface, the invention comprising:

a. at least one elongated groove on the outer surface of the ball which encompasses at least two of the said dimples for use in interlocking with the striking face of a golf club;

b. the groove having a transverse width dimension substantially the same as the width of a dimple;

c. the groove having a generally uniform transverse cross section substantially the same as the transverse cross section of a dimple;

d. the groove having reduced ends.

2. The invention as recited in claim 1, wherein there are a plurality of grooves that are generally parallel to each other, and the minimum distance between the longitudinal axes of adjacent grooves is substantially equal to the mean center to center distance between adjacent rows of dimples, and the maximum distance between the longitudinal axes of adjacent grooves is substantially equal to three times the mean center to center distance between adjacent rows of dimples.

3. The invention as recited in claim 1 wherein an indicia is marked on the outer surface of the ball, the center of said indicia being substantially spaced about 90°

from the center of the groove.

4. The invention as recited in claim 1 wherein there are a plurality of grooves that are generally parallel to each other, and the minimum length of the grooves is defined as being substantially equal to the mean center to center distance between adjacent dimples plus one mean diameter of a dimple, while the maximum length of the grooves is defined as being substantially equal to three times the mean center to center distance between adjacent dimples plus one mean diameter of a dimple.

5. The invention as recited in claim 4 wherein the grooves form a continuous band around the circumference of the ball.

6. The invention as recited in claims 2 or 4 wherein the grooves extend in a comtinuous band around the circumference of the ball, there being a mixture of both minimum and maximum length grooves.

7. The invention as recited in claim 4 wherein the grooves are each substantially positioned within a continuous row of dimples.

8. The invention as recited in claims 2 or 4 wherein the grooves form a continuous band around the circumference of the ball, and dimples are spaced between at least some of the adjacent grooves.

9. The invention as recited in claims 2 or 4 wherein a cluster of about four grooves are centered on a great circle of the ball, and an indicia is marked on the outer surface of the ball, the center of said indicia being substantially spaced about 90°

from the center of the cluster of grooves.

10. The invention as recited in claims 2 or 4 wherein a cluster of about four grooves are centered on a great circle of the ball, and an indicia is marked on the outer surface of the ball, the center of said indicia being substantially spaced about 90°

from the center of the cluster of grooves, there being two clusters of grooves located on generally diametrically opposite sides of the ball to form a configuration of symmetry.

11. The invention as recited in claims 2 or 4 wherein the grooves form a continuous band around the circumference of the ball, and where certain grooves are of generally straight lengths while the remainder of the grooves have a chevron-like shape.

13. The invention as recited in claims 1 or 11 wherein there are a plurality of grooves that form a continuous band around the circumference of the ball, certain of the grooves being rectilinear and generally parallel to each other, while other grooves are non-linear while being generally parallel to each other.

14. The invention as recited in claims 1 or 11 wherein there are a plurality of grooves that form a band around the circumference of the ball, certain of the grooves being offset from adjacent grooves.

12. A golf ball in the shape of a sphere having in its outer surface a plurality of spaced dimples which substantially cover the outer surface, the invention comprising:

a. at least one elongated groove arranged within a continuous row of dimples and encompassing at least two of said dimples;

b. the groove having a transverse width dimension substantially the same as the width of a dimple;

c. the groove having a generally uniform transverse cross section that is substantially the same as the transverse cross section of a dimple;

d. the groove having rounded ends;

e. the bottom surface of the groove being generally concentric with the circumference of the ball;

f. the groove having a length that is less than the circumference of the ball.