Golf club head with permanent performance indicating indicia
First Claim
1. A golf club head (100) comprising:
- A) a face (200) having a face center (250) and a center face measured performance variable;
B) a center face permanent indicia (252) on the face that is indicative of the center face measured performance variable; and
C) wherein the center face permanent indicia (252) has a center face permanent indicia CIELab L* value, the face (200) outside of the center face permanent indicia (252) has a face CIELab L* value, and the golf club head (100) has a volume and a loft, wherein the difference between the center face permanent indicia CIELab L* value and the face CIELab L* value is related to the volume and the loft by the equation Δ
L*≦
(volume)/100×
(loft).
13 Assignments
0 Petitions
Accused Products
Abstract
A golf club head having a face with a face center and a center face measured performance variable, which may be a characteristic time, or CT, value, a coefficient of restitution, or COR, value, or a potential smash factor. The face includes a center face permanent indicia that is indicative of the center face measured performance variable. Relationships among the permanent indicia and the face are disclosed to reduce the likelihood of distraction caused by the permanent indicia as a golfer addresses a shot. Further, the surface roughness of the permanent indicia is controlled with respect to the surface roughness of the face to reduce the impact that the permanent indicia has on the performance of the golf club head.
-
Citations
20 Claims
-
1. A golf club head (100) comprising:
-
A) a face (200) having a face center (250) and a center face measured performance variable; B) a center face permanent indicia (252) on the face that is indicative of the center face measured performance variable; and C) wherein the center face permanent indicia (252) has a center face permanent indicia CIELab L* value, the face (200) outside of the center face permanent indicia (252) has a face CIELab L* value, and the golf club head (100) has a volume and a loft, wherein the difference between the center face permanent indicia CIELab L* value and the face CIELab L* value is related to the volume and the loft by the equation Δ
L*≦
(volume)/100×
(loft). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A golf club head (100) comprising:
-
A) a face (200) having a face center (250) and a center face measured performance variable; B) a center face permanent indicia (252) on the face that is indicative of the center face measured performance variable; and C) wherein golf club head (100) has a loft, the center face permanent indicia (252) has a permanent indicia surface roughness, and the face (200) has a face surface roughness and a face area, and wherein the difference between the permanent indicia surface roughness and the face surface roughness is related to the loft and the face area by the equation Δ
SR≧
60*(face area)/(loft), for lofts less than 25 degrees, wherein the permanent indicia surface roughness is greater than the face surface roughness. - View Dependent Claims (12, 13, 14, 15, 16)
-
-
17. A golf club head (100) comprising:
-
A) a face (200) having a face center (250) and a center face measured performance variable; B) a center face permanent indicia (252) on the face that is indicative of the center face measured performance variable; C) a first permanent indicia (310) located on a face toe portion (260) of the face (200) indicative of a first measured performance variable measured at a first face point (300) located on a face toe portion (260), wherein the face (200) has a first thickness (320) at the first face point (300), and the first permanent indicia (310) has a first indicia surface area (340); and D) wherein the golf club head (100) includes; (i) a bore having a center that defines a shaft axis (SA) which intersects with a horizontal ground plane (GP) to define an origin point and establish a vertical shaft axis plane (SAP); and (ii) a center of gravity (CG) located; (i) vertically from the origin point a distance Ycg; (ii) horizontally from the origin point a distance Xcg that parallel to the shaft axis plane (SAP) and the ground plane (GP); and (iii) a distance Zcg from the origin in a direction orthogonal to the shaft axis plane (SAP); (iii) wherein the face (200) has a face perimeter (210) and a shortest distance along the face (200) from the first face point (300) to the face perimeter (210) is less than the Xcg distance. - View Dependent Claims (18, 19, 20)
-
Specification