US2002128090A1PendingUtilityA1
Golf putter with improved curved striking face, putter system, and method of making same
Est. expiryNov 7, 2017(expired)· nominal 20-yr term from priority
A63B 53/0433A63B 53/005A63B 53/0408A63B 53/0487
38
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
An improved vertically-curved strike face for a golf putter, the roll radius for which is determined based on the given strike face height and loft selected, wherein, regardless of a given golfer's putting stroke style, and of variations within that stroke style, the improved curved strike face as determined permits consistently impacting the golf ball in a critical true roll zone just slightly below the equator. Custom-fitting, to accommodate a given golfer's extreme putting style, or a given course's daily Stimpmeter (trademark) reading, or green speed or mowed putting green conditions, can be achieved by selecting a given curved strike face loft and the resultant strike face roll radius. A basic form of the invention comprises a series of putters with different roll radii, for a given loft and strike face height.
Claims
exact text as granted — not AI-modifiedWe claim:
1 . The method of forming an optimal vertically curved strike face for a golf putter, for allowing the curved strike face to consistently impact the golf ball at a point within the ball's true roll impact zone in a range from approximately 0.015 inch to 0.073 inch below the ball's equator, and regardless of the putting stroke style used by a given golfer, comprising the steps of:
a) selecting a putter design having a given strike face height; b) selecting a static loft for the curved strike face based on the putting green speed condition; and c) calculating the required roll radius for the curved strike face, as based on the selected face height and static loft, to allow impacting the ball within the true roll impact zone, using the equations of:
(1) “A”=sin (static loft) (0.5) (face height)
(2) “C”=tan (static loft) (A)
(3) h={square root}{square root over (A 2 +C 2 )}
Diameter = ( h 2 + ( 0.5 face height ) 2 ) h ( 4 ) Curved Radius = Diameter 2 ( 5 )
wherein A, C, and h are as set forth in FIG. 18 of the DRAWINGS.
2 . The method of claim 1 , and wherein the selected static loft falls within the range of from approximately 1° to 5° positive.
3 . The method of claim 1 , and wherein the resulting dynamic loft delivered to the golf ball at impact falls within the range of from approximately 2°to 4° positive.
4 . The method of claim 1 , and wherein the selected static loft is so custom selected that, for use with relatively fast greens having a mowed grass height of from approximately 0.125 inch to 0.156 inch, the resultant putter's curved strike face static loft is from approximately 1° to 3° positive.
5 . The method of claim 1 , and wherein the selected static loft is so custom selected that, for use with relatively moderate speed greens having a mowed grass height of from approximately 0.156 inch to 0.281 inch, the resultant putter's curved strike face static loft is from approximately 2° to 4° positive.
6 . The method of claim 1 , and wherein the selected static loft is so custom selected that, for use with relatively slow speed greens having a mowed grass height of from approximately 0.172 inch to 0.281 inch, the resultant putter's curved strike face static loft is from 3° to 5° positive.
7 . The method of claim 1 , and, so as to accommodate the dynamic shaft angle delivered by a golfer having an extreme forward press putting stroke style, of increasing said static loft in the range of from approximately 3° to 5° positive loft for said static loft selected in step (b) above.
8 . The method of claim 1 , and, so as to accommodate the dynamic short angle delivered by a golfer having an extreme broken wrist putting stroke style, of reducing said static loft in the range of from approximately 1° to 3° positive loft from said static loft selected in step (b) above.
9 . The method of claim 1 , and determining the required X and Y displacements to find the center of curvature of the optimal roll radius calculated by step (c) above, wherein X and Y are determined using the equations of:
(1) “A”=sin (static loft) (0.5) (face height) ( 2 ) “ D ” = A tan ( static loft ) (3) “C”=tan (static loft) (A) (4) “B”=D+C (5) “E”=sin (static loft) (face radius) (6) “Y” dimension=B−E (7) “X” dimension=cos (static loft) (face radius) wherein A, B, C, D, and E are as set forth in FIG. 18 of the DRAWINGS.
10 . A plurality of vertically curved strike face putters, each said putter of the plurality, while having substantially the same face height and static loft, having a different roll radius for that given said putter's curved strike face, whereby a golfer on a given day can select which respective putter within the plurality best accommodates that golfer's putting stroke style and that given day's putting green conditions.
11 . An improved vertically curved strike face putter having an optimal roll radius to permit impacting the golf ball within a true roll impact zone falling within the range from approximately 0.018 inch to 0.073 inch below the ball's equator, the improvement comprising in combination:
a) a known face height (FH) for said curved strike face, b) a known static loft selected for said curved strike face, and c) said optimal roll radius formed on said curved strike face, based on said known face height (FH) and said known static loft, determined through the equations of:
(1) “A”=sin (static loft) (0.5) (face height)
(2) “C”=tan (static loft) (A)
( 3 ) h = A 2 + C 2 ( 4 ) Diameter = ( h 2 + ( 0.5 face height ) 2 ) h
Curved Radius = Diameter 2 ( 5 )
12 . The invention of claim 11 , and wherein said known static loft falls within the range from approximately 1° to 5° positive loft.
13 . The method of determining an optimal roll radius for a vertically curved strike face putter, comprising the steps of:
a) determining the face height of the selected design of curved strike face putter; b) selecting the static loft of the curved strike face; and c) determining the required optimal roll radius, as a function of said determined face height and said selected static loft, whereby said optimal roll radius permits said curved strike face putter, regardless of a given golfer's putting stroke style and the golfer's own tolerance variations within that style, to consistently impact the golf ball within a true roll impact zone below the ball's equator so that the ball will achieve the earliest true roll.
14 . The method of claim 13 , and wherein said true roll impact zone is in the range from approximately 0.015 inch to 0.073 inch below the ball's equator.
15 . The method of claim 13 , and wherein said true roll impact zone for use on relatively fast speed putting greens is in the range from approximately 0.015 inch to 0.044 inch below the ball's equator.
16 . The method of claim 13 , and wherein said true roll impact zone for use on relatively average speed putting greens, is in the range from approximately 0.024 inch to 0.059 inch below the ball's equator.
17 . The method of claim 13 , and wherein said two roll impact zone for use on relatively slow speed putting greens is in the range of from approximately 0.044 inch to 0.073 inch below the ball's equator.
18 . An improved vertically-curved strike face putter able to consistently impact a golf ball within the ball's true roll impact zone below the ball's equator, regardless of a given golfers putting stroke style, said putter's curved strike face formed of a selected face height and of a selected static loft, said curved strike face having an optimal roll radius resulting from said face height and static loft, said face height and said static loft selected from, and said resultant optimal roll radii, and the correlating X and Y displacement data for the center-of-curvature location for such resultant optimal roll radii, are established in, the following optimum roll radii charts:
Loft Angle
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.002
0.002
0.003
0.003
0.003
0.003
0.003
0.004
0.004
0.004
0.004
0.005
0.005
0.005
0.005
0.005
0.006
0.006
0.006
0.006
0.007
C =
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
h =
0.002
0.002
0.003
0.003
0.003
0.003
0.003
0.004
0.004
0.004
0.004
0.005
0.005
0.005
0.005
0.005
0.006
0.006
0.006
0.006
0.007
Diameter =
28.649
31.514
34.379
37.244
40.109
42.974
45.839
48.704
51.569
54.434
57.299
60.164
63.029
65.893
68.758
71.623
74.488
77.353
80.218
83.083
85.948
D =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
B =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“X” =
14.324
15.757
17.189
18.621
20.054
21.486
22.919
24.351
25.783
27.216
28.648
30.081
31.513
32.945
34.378
35.810
37.243
38.675
40.108
41.540
42.972
Roll Radius
14.325
15.757
17.190
18.622
20.055
21.487
22.919
24.352
25.784
27.217
28.649
30.082
31.514
32.947
34.379
35.812
37.244
38.677
40.109
41.542
42.974
Loft Angle
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.004
0.005
0.005
0.006
0.006
0.007
0.007
0.007
0.008
0.008
0.009
0.009
0.010
0.010
0.010
0.011
0.011
0.012
0.012
0.013
0.013
C =
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
h =
0.004
0.005
0.005
0.006
0.006
0.007
0.007
0.007
0.008
0.008
0.009
0.009
0.010
0.010
0.010
0.011
0.011
0.012
0.012
0.013
0.013
Diameter =
14.327
15.760
17.192
18.625
20.058
21.490
22.923
24.356
25.788
27.221
28.654
30.086
31.519
32.952
34.384
35.817
37.250
38.683
40.115
41.548
42.981
D =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
B =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“X” =
7.162
7.879
8.595
9.311
10.027
10.744
11.460
12.176
12.892
13.608
14.325
15.041
15.757
16.473
17.190
17.906
18.622
19.338
20.055
20.771
21.487
Roll Radius
7.163
7.880
8.596
9.312
10.029
10.745
11.461
12.178
12.894
13.611
14.327
15.043
15.760
16.476
17.192
17.909
18.625
19.341
20.058
20.774
21.490
Loft Angle
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.007
0.007
0.008
0.009
0.009
0.010
0.010
0.011
0.012
0.012
0.013
0.014
0.014
0.015
0.016
0.016
0.017
0.018
0.018
0.019
0.020
C =
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.001
h =
0.007
0.007
0.008
0.009
0.009
0.010
0.010
0.011
0.012
0.012
0.013
0.014
0.014
0.015
0.016
0.016
0.017
0.018
0.018
0.019
0.020
Diameter =
9.554
10.509
11.464
12.420
13.375
14.330
15.286
16.241
17.197
18.152
19.107
20.063
21.018
21.973
22.929
23.884
24.840
25.795
26.750
27.706
28.681
D =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
B =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“X” =
4.775
5.253
5.730
6.208
6.685
7.163
7.640
8.118
8.695
9.073
9.550
10.028
10.505
10.983
11.460
11.938
12.416
12.893
13.371
13.848
14.326
Roll Radius
4.777
5.255
5.732
6.210
6.688
7.165
7.643
8.121
8.598
9.076
9.554
10.031
10.509
10.987
11.464
11.942
12.420
12.897
13.375
13.853
14.330
Loft Angle
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Face Height
0.5
0.55
0.6
0.65
0.7
0.75 0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.009
0.010
0.010
0.011
0.012
0.013
0.014
0.015
0.016
0.017
0.017
0.018
0.019
0.020
0.021
0.022
0.023
0.024
0.024
0.025
0.026
C =
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
h =
0.009
0.010
0.010
0.011
0.012
0.013
0.014
0.015
0.016
0.017
0.017
0.018
0.019
0.020
0.021
0.022
0.023
0.024
0.024
0.025
0.026
Diameter =
7.168
7.885
8.601
9.318
10.035
10.752
11.468
12.185
12.902
13.619
14.336
15.052
15.769
16.486
17.203
17.919
18.636
19.353
20.070
20.787
21.503
D =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
B =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“X” =
3.582
3.940
4.298
4.656
5.014
5.373
5.731
6.089
6.447
6.085
7.163
7.522
7.880
8.238
8.596
8.954
9.312
9.671
10.029
10.387
10.745
Roll Radius
3.584
3.942
4.301
4.659
5.017
5.376
5.734
6.093
6.451
6.809
7.168
7.526
7.885
8.243
8.601
8.960
9.318
9.677
10.035
10.393
10.752
Loft Angle
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.011
0.012
0.013
0.014
0.015
0.016
0.017
0.019
0.020
0.021
0.022
0.023
0.024
0.0225
0.026
0.027
0.028
0.0.029
0.031
0.032
0.033
C =
0.000
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
h =
0.011
0.012
0.013
0.014
0.015
0.016
0.017
0.019
0.020
0.021
0.022
0.023
0.024
0.025
0.026
0.027
0.028
0.029
0.031
0.032
0.033
Diameter =
5.737
6.311
6.884
7.458
8.032
8.605
9.179
9.753
10.326
10.900
11.474
12.047
12.621
13.195
13.768
14.342
14.916
15.490
16.063
16.637
17.211
D =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
B =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“X” =
2.866
3.152
3.439
3.725
4.012
4.299
4.585
4.872
5.158
5.445
5.731
6.018
6.305
6.591
6.878
7.164
7.451
7.737
8.024
8.311
8.597
Roll Radius
2.868
3.155
3.442
3.729
4.016
4.303
4.589
4.876
5.163
5.450
5.737
6.024
6.311
6.597
6.884
7.171
7.458
7.745
8.032
8.318
8.605
Loft Angle
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.013
0.014
0.016
0.017
0.018
0.020
0.021
0.022
0.024
0.025
0.026
0.027
0.029
0.030
0.031
0.033
0.034
0.035
0.037
0.038
0.039
C =
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.002
h =
0.013
0.014
0.016
0.017
0.018
0.020
0.021
0.022
0.024
0.025
0.026
0.028
0.029
0.030
0.031
0.033
0.034
0.035
0.037
0.038
0.039
Diameter =
4.783
5.262
5.740
6.218
6.697
7.175
7.653
8.132
8.610
9.088
9.567
10.045
10.523
11.002
11.480
11.958
12.437
12.915
13.393
13.872
14.350
D =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
B =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“X” =
2.388
2.627
2.866
3.105
3.344
3.583
3.821
4.060
4.299
4.538
4.777
5.016
5.255
5.493
5.732
5.971
6.210
6.449
6.688
6.926
7.165
Roll Radius
2.392
2.631
2.870
3.109
3.348
3.588
3.827
4.066
4.305
4.544
4.783
5.023
5.262
5.501
5.740
5.979
6.218
6.458
6.697
6.936
7.175
Loft Angle
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.015
0.017
0.018
0.020
0.021
0.023
0.024
0.026
0.027
0.029
0.031
0.032
0.034
0.035
0.037
0.038
0.040
0.041
0.043
0.044
0.046
C =
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.003
0.003
0.003
0.003
h =
0.015
0.017
0.018
0.020
0.021
0.023
0.024
0.026
0.028
0.029
0.031
0.032
0.034
0.035
0.037
0.038
0.040
0.041
0.043
0.044
0.046
Diameter =
4.103
4.513
4.923
5.334
5.744
6.154
6.564
6.975
7.385
7.795
8.206
8.616
9.026
9.436
9.847
10.257
10.667
1.077
11.488
11.898
12.308
D =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
B =
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.225
0.238
0.250
0.263
0.275
0.288
0.300
0.313
0.325
0.338
0.350
0.363
0.375
“X” =
2.048
2.252
2.457
2.662
2.867
3.071
3.276
3.481
3.686
3.890
4.095
4.300
4.505
4.709
4.914
5.119
5.324
5.528
5.733
5.938
6.143
Roll Radius
2.051
2.257
2.462
2.667
2.872
3.077
3.282
3.487
3.692
3.898
4.103
4.308
4.513
4.718
4.923
5.128
5.334
5.539
5.744
5.949
6.154
Loft Angle
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.017
0.019
0.021
0.023
0.024
0.026
0.028
0.030
0.031
0.033
0.035
0.037
0.038
0.040
0.042
0.044
0.045
0.047
0.049
0.051
0.052
C =
0,001
0.001
0.001
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.003
0/003
0/003
0.003
0.003
0.003
0.003
0.003
0.004
0.004
h =
0.017
0.019
0.021
0.023
0.024
0.026
0.028
0.030
0.031
0.033
0.035
0.037
0.038
0.040
0.042
0.044
0.045
0.047
0.049
0.051
0.052
Diameter =
3.593
3.952
4.311
4.670
5.030
5.389
5.748
6.108
6.467
6.826
7.185
7.545
7.904
8.263
8.622
8.982
9.341
9.700
10.059
10.419
10.778
D =
0.249
0.274
0.299
0.324
0.349
0.374
0.399
0.424
0.449
0.474
0.499
0.524
0.549
0.574
0.599
0.623
0.648
0.673
0.698
0.723
0.748
B =
0.251
0.276
0.301
0.326
0.351
0.376
0.401
0.426
0.451
0.476
0.501
0.526
0.551
0.576
0.601
0.627
0.652
0.677
0.702
0.727
0.752
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.226
0.238
0.251
0.263
0.276
0.288
0.301
0.313
0.326
0.338
0.351
0.363
0.376
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.226
0.238
0.251
0.263
0.276
0.288
0.301
0.313
0.326
0.338
0.351
0.363
0.376
“X” =
1.792
1.971
2.150
2.330
2.509
2.688
2.867
3.046
3.226
3.405
3.584
3.763
3.942
4.121
4.301
4.480
4.659
4.838
5.017
5.197
5.376
Roll Radius
1.796
1.976
2.156
2.335
2.515
2.694
2.874
3.054
3.233
3.413
3.593
3.772
3.952
4.132
4.311
4.491
4.670
4.850
5.030
5.209
5.389
Loft Angle
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.020
0.022
0.024
0.025
0.027
0.029
0.031
0.033
0.035
0.037
0.039
0.041
0.043
0.045
0.047
0.049
0.051
0.053
0.055
0.057
0.059
C =
0.002
0.002
0.002
0.002
0.002
0.002
0.002
0.003
0.003
0.003
0.003
0.003
0.003
0.004
0.004
0.004
0.004
0.004
0.004
0.004
0.005
h =
0.020
0.022
0.024
0.025
0.027
0.029
0.031
0.033
0.035
0.037
0.039
0.041
0.043
0.045
0.047
0.049
0.051
0.053
0.055
0.057
0.059
Diameter =
3.196
3.516
3.835
4.155
4.475
4.794
5.114
5.434
5.753
6.073
6.392
6.712
7.032
7.351
7.671
7.991
8.310
8.630
8.949
9.269
9.589
D =
0.249
0.274
0.299
0.324
0.349
0.374
0.399
0.424
0.449
0.474
0.499
0.524
0.549
0.574
0.599
0.623
0.648
0.673
0.698
0.723
0.748
B =
0.251
0.276
0.301
0.326
0.351
0.376
0.401
0.426
0.451
0.476
0.501
0.526
0.551
0.576
0.601
0.627
0.652
0.677
0.702
0.727
0.752
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.226
0.238
0.251
0.263
0.276
0.288
0.301
0.313
0.326
0.339
0.351
0.363
0.376
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.226
0.238
0.251
0.263
0.276
0.288
0.301
0.313
0.326
0.339
0.351
0.363
0.376
“X” =
1.593
1.753
1.912
2.071
2.230
2.390
2.549
2.708
2.868
3.027
3.186
3.346
3.505
3.664
3.824
3.983
4.142
4.302
4.461
4.620
4.780
Roll Radius
1.598
1.758
1.918
2.078
2.237
2.397
2.557
2.717
2.887
3.036
3.196
3.356
3.516
3.676
3.835
3.995
4.155
4.315
4.475
4.635
4.794
Loft Angle
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.022
0.024
0.026
0.028
0.031
0.033
0.035
0.037
0.039
0.041
0.044
0.046
0.048
0.050
0.052
0.054
0.057
0.059
0.061
0.063
0.065
C =
0.002
0.002
0.002
0.002
0.003
0.003
0.003
0.003
0.003
0.004
0.004
0.004
0.004
0.004
0.005
0.005
0.005
0.005
0.005
0.006
0.006
h =
0.022
0.024
0.026
0.028
0.031
0.033
0.035
0.037
0.039
0.041
0.044
0.046
0.048
0.050
0.052
0.054
0.057
0.059
0.061
0.063
0.065
Diameter =
2.879
3.167
3.455
3.743
4.031
4.319
4.607
4.895
5.183
5.471
5.759
6.047
6.335
6.623
6.911
7.198
7.486
7.774
8.062
8.350
8.638
D =
0.249
0.274
0.299
0.324
0.349
0.374
0.399
0.424
0.449
0.474
0.499
0.524
0.549
0.574
0.599
0.623
0.648
0.673
0.698
0.723
0.748
B =
0.251
0.276
0.301
0.326
0.351
0.376
0.401
0.426
0.451
0.476
0.501
0.526
0.551
0.576
0.601
0.627
0.652
0.677
0.702
0.727
0.752
E =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.226
0.238
0.251
0.263
0.276
0.288
0.301
0.313
0.326
0.339
0.351
0.363
0.376
“Y” =
0.125
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.226
0.238
0.251
0.263
0.276
0.288
0.301
0.313
0.326
0.339
0.351
0.363
0.376
“X” =
1.434
1.578
1.721
1.864
2.008
2.151
2.295
2.438
2.582
2.725
2.868
3.012
3.155
3.299
3.442
3.586
3.729
3.872
4.016
4.159
4.303
Roll Radius
1.440
1.584
1.728
1.872
2.016
2.160
2.304
2.447
2.591
2.735
2.879
3.023
3.167
3.311
3.455
3.599
3.743
3.887
4.031
4.175
4.319
Loft Angle
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.024
0.026
0.029
0.031
0.034
0.036
0.038
0.041
0.043
0.046
0.048
0.050
0.053
0.055
0.058
0.060
0.062
0.065
0.067
0.069
0.072
C =
0.002
0.003
0.003
0.003
0.003
0.003
0.004
0.004
0.004
0.004
0.005
0.005
0.005
0.005
0.006
0.006
0.006
0.006
0.006
0.007
0.007
h =
0.024
0.026
0.029
0.031
0.034
0.036
0.038
0.041
0.043
0.046
0.048
0.050
0.053
0.055
0.058
0.060
0.062
0.065
0.067
0.069
0.072
Diameter =
2.620
2.882
3.145
3.407
3.669
3.931
4.193
4.455
4.717
4,979
5.241
5.503
5.765
6.027
6.289
6.551
6.813
7.075
7.337
7.599
7.861
D =
0.249
0.274
0.299
0.324
0.349
0.374
0.399
0.424
0.449
0.474
0.499
0.524
0.549
0.574
0.599
0.623
0.648
0.673
0.698
0.723
0.748
B =
0.251
0.276
0.301
0.326
0.351
0.376
0.401
0.426
0.451
0.476
0.501
0.526
0.551
0.576
0.601
0.627
0.652
0.677
0.702
0.727
0.752
E =
0.126
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.226
0.238
0.251
0.263
0.276
0.288
0.301
0.313
0.327
0.339
0.352
0.363
0.377
“Y” =
0.126
0.138
0.150
0.163
0.175
0.188
0.200
0.213
0.226
0.238
0.251
0.263
0.276
0.288
0.301
0.313
0.327
0.339
0.352
0.363
0.377
“X” =
1.304
1.435
1.565
1.695
1.826
1.956
2.087
2.217
2.348
2.478
2.608
2.739
2.869
3.000
3.130
3.260
3.391
3.521
3.652
3.782
3.913
Roll Radius
1.310
1,441
1.572
1.703
1.834
1.965
2.096
2.227
2.358
2.489
2.620
2.751
2.882
3.013
3.145
3.276
3.407
3.538
3.669
3.800
3.931
Loft Angle
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
6
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.026
0.029
0.031
0.034
0.037
0.039
0.042
0.044
0.047
0.050
0.052
0.055
0.057
0.060
0.063
0.065
0.068
0.071
0.073
0.076
0.078
C =
0.003
0.003
0.003
0.004
0.004
0.004
0.004
0.005
0.005
0.005
0.005
0.006
0.006
0.006
0.007
0.007
0.007
0.007
0.008
0.008
0.008
h =
0.026
0.029
0.032
0.034
0.037
0.039
0.042
0.045
0.047
0.050
0.053
0.055
0.058
0.060
0.063
0.066
0.068
0.071
0.074
0.076
0.079
Diameter =
2.405
2.645
2.886
3.126
3.367
3.607
3.848
4.088
4.329
4.569
4.810
5.050
5.291
5.531
5.772
6.012
6.253
6.493
6.734
6.974
7.215
D =
0.249
0.273
0.298
0.323
0.348
0.373
0.398
0.423
0.448
0.472
0.497
0.522
0.547
0.572
0.597
0.622
0.646
0.671
0.696
0.721
0.746
B =
0.251
0.277
0.302
0.327
0.352
0.377
0.402
0.427
0.452
0.478
0.503
0.528
0.553
0.578
0.603
0.628
0.654
0.679
0.704
0.729
0.754
E =
0.126
0.138
0.151
0.163
0.176
0.189
0.201
0.214
0.226
0.239
0.251
0.264
0.277
0.289
0.302
0.314
0.327
0.339
0.352
0.364
0.377
“Y” =
0.126
0.138
0.151
0.163
0.176
0.189
0.201
0.214
0.226
0.239
0.251
0.264
0.277
0.289
0.302
0.314
0.327
0.339
0.352
0.364
0.377
“X” =
1.196
1.315
1.435
1.555
1.674
1.794
1.913
2.033
2.153
2.272
2.392
2.511
2.631
2.750
2.870
2.990
3.109
3.229
3.348
3.468
3.588
Roll Radius
1.202
1.323
1.443
1.563
1.683
1.804
1.924
2.044
2.164
2.285
2.405
2.525
2.645
2.766
2.886
3.006
3.126
3.247
3.367
3.487
3.607
Loft Angle
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.028
0.031
0.034
0.037
0.040
0.042
0.045
0.048
0.051
0.054
0.057
0.059
0.062
0.065
0.068
0.071
0.074
0.076
0.079
0.082
0.085
C =
0.003
0.004
0.004
0.004
0.005
0.005
0.005
0.005
0.006
0.006
0.006
0.007
0.007
0.007
0.008
0.008
0.008
0.009
0.009
0.009
0.010
h =
0.028
0.031
0.034
0.037
0.040
0.043
0.046
0.048
0.051
0.054
0.057
0.060
0.063
0.066
0.068
0.071
0.074
0.077
0.080
0.083
0.085
Diameter =
2.223
2.445
2.667
2.890
3.112
3.334
3.556
3.779
4.001
4.223
4.445
4.668
4.890
5.112
5.334
5.557
5.779
6.001
6.224
6.446
6.668
D =
0.248
0.273
0.298
0.323
0.348
0.373
0.397
0.422
0.447
0.472
0.497
0.522
0.546
0.571
0.596
0.621
0.646
0.671
0.696
0.720
0.745
B =
0.252
0.277
0.302
0.327
0.352
0.377
0.403
0.428
0.453
0.478
0.503
0.528
0.554
0.579
0.604
0.629
0.654
0.679
0.705
0.730
0.755
E =
0.126
0.138
0.151
0.164
0.176
0.189
0.201
0.214
0.226
0.239
0.252
0.264
0.277
0.289
0.302
0.315
0.327
0.340
0.352
0.365
0.377
“Y” =
0.126
0.138
0.151
0.164
0.176
0.189
0.201
0.214
0.226
0.239
0.252
0.264
0.277
0.289
0.302
0.315
0.327
0.340
0.352
0.365
0.377
“X” =
1.104
1.215
1.325
1.435
1.546
1.656
1.767
1.877
1.988
2.098
2.208
2.319
2.249
2.540
2.650
2.761
2.871
2.981
3.092
3.202
3.313
Roll Radius
1.111
1.222
1.334
1.445
1.556
1.667
1.778
1.889
2.000
2.112
2.223
2.334
2.445
2.556
2.667
2.778
2.890
3.001
3.112
3.223
3.334
Loft Angle
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
Face Height
0.5
0.55
0.6
0.65
0.07
0.75
0.08
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.030
0.034
0.037
0.040
0.043
0.046
0.049
0.052
0.055
0.058
0.061
0.064
0.067
0.070
0.073
0.076
0.079
0.082
0.085
0.088
0.091
C =
0.004
0.004
0.004
0.005
0,005
0.006
0.006
0.006
0.007
0.007
0.007
0.008
0.008
0.009
0.009
0.009
0.010
0.010
0.010
0.011
0.011
h =
0.031
0.034
0.037
0.040
0.043
0.046
0.049
0.052
0.055
0.058
0.061
0.064
0.068
0.071
0.074
0.077
0.080
0.083
0.086
0.089
0.092
Diameter =
2.067
2.273
2.480
2.687
2.893
3.100
3.307
3.514
3.720
3.927
4.134
4.340
4.547
4.754
4.960
5.167
5.374
5.580
5.787
5.994
6.200
D =
0.248
0.273
0.298
0.323
0.347
0.372
0.397
0.422
0.447
0.471
0.496
0.521
0.546
0.571
0.596
0.620
0.645
0.670
0.695
0.720
0.744
B =
0.252
0.277
0.302
0.327
0.353
0.378
0.403
0.428
0.453
0.479
0.504
0.529
0.554
0.579
0.605
0.630
0.655
0.680
0.705
0.730
0.756
E =
0.126
0.139
0.151
0.164
0.176
0.189
0.202
0.214
0.227
0.239
0.252
0.264
0.277
0.290
0.302
0.315
0.327
0.340
0.353
0.365
0.378
“Y” =
0.126
0.139
0.151
0.164
0.176
0.189
0.202
0.214
0.227
0.239
0.252
0.264
0.277
0.290
0.302
0.315
0.327
0.340
0.353
0.365
0.378
“X” =
1.026
1.128
1.231
1.333
1.436
1.539
1.641
1.744
1.846
1.949
2.051
2.154
2.257
2.359
2.462
2.564
2.667
2.769
2.872
2.974
3.077
Roll Radius
1.033
1.137
1.240
1.343
1.447
1.550
1.653
1.757
1.860
1.963
2.067
2.170
2.273
2.377
2.480
2.583
2.867
2.790
2.893
2.997
3.100
Loft Angle
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.033
0.036
0.039
0.042
0.046
0.049
0.052
0.055
0.059
0.062
0.065
0.069
0.072
0.075
0.078
0.082
0.085
0.088
0.091
0.095
0.098
C =
0.004
0.005
0.005
0.006
0.006
0.006
0.007
0.007
0.008
0.008
0.009
0.009
0.009
0.010
0.010
0.011
0.011
0.012
0.012
0.012
0.013
h =
0.033
0.036
0.039
0.043
0.046
0.049
0.053
0.056
0.059
0.063
0.066
0.069
0.072
0.076
0.079
0.082
0.086
0.089
0.092
0.095
0.099
Diameter =
1.932
2.125
2.318
2.511
2.705
2.898
3.091
3.284
3.477
3.671
3.864
4.057
4.250
4.443
4.636
4.830
5.023
5.216
5.409
5.602
5.796
D =
0.248
0.273
0.297
0.322
0.347
0.372
0.397
0.421
0.446
0.471
0.496
0.521
0.545
0.570
0.595
0.620
0.644
0.669
0.694
0.719
0.744
B =
0.252
0.277
0.303
0.328
0.353
0.378
0.403
0.429
0.454
0.479
0.504
0.530
0.555
0.580
0.605
0.630
0.656
0.681
0.706
0.731
0.756
E =
0.126
0.139
0.151
0.164
0.177
0.189
0.202
0.214
0.227
0.240
0.252
0.265
0.277
0.290
0.303
0.315
0.328
0.340
0.353
0.366
0.378
“Y” =
0.126
0.139
0.151
0.164
0.177
0.189
0.202
0.214
0.227
0.240
0.252
0.265
0.277
0.290
0.303
0.315
0.328
0.340
0.353
0.366
0.378
“X” =
0.958
1.053
1.149
1.245
1.341
1.436
1.632
1.628
1.724
1.820
1.915
2.011
2.107
2.203
2.298
2.394
2.490
2.586
2.681
2.777
2.873
Roll Radius
0.966
1.063
1.159
1.256
1.352
1.449
1.545
1.642
1.739
1.835
1.932
2.028
2.125
2.222
2.318
2.415
2.511
2.608
2.705
2.801
2.898
Loft Angle
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calculations
A =
0.035
0.038
0.042
0.045
0.049
0.052
0.056
0.059
0.063
0.066
0.070
0.073
0.077
0.080
0.084
0.087
0.090
0.094
0.097
0.101
0.104
C =
0.005
0.005
0.006
0.006
0.007
0.007
0.008
0.008
0.009
0.009
0.010
0.010
0.011
0.011
0.012
0.012
0.013
0.013
0.014
0.014
0.015
h =
0.035
0.039
0.042
0.046
0.049
0.053
0.056
0.060
0.063
0.067
0.070
0.074
0.077
0.081
0.084
0.088
0.091
0.095
0.098
0.102
0.105
Diameter =
1.814
1.995
2.177
2.358
2.540
2.721
2.902
3.084
3.265
3.447
3.628
3.809
3.991
4.172
4.354
4.535
4.716
4.898
5.079
5.261
5.442
D =
0.248
0.272
0.297
0.322
0.347
0.371
0.396
0.421
0.446
0.470
0.495
0.520
0.545
0.569
0.594
0.619
0.644
0.668
0.693
0.718
0.743
B =
0.252
0.278
0.303
0.328
0.353
0.379
0.404
0.429
0.454
0.480
0.505
0.530
0.555
0.581
0.606
0.631
0.656
0.682
0.707
0.732
0.757
E =
0.126
0.139
0.151
0.164
0.177
0.189
0.202
0.215
0.227
0.240
0.252
0.265
0.278
0.290
0.303
0.316
0.328
0.341
0.353
0.366
0.379
“Y” =
0.126
0.139
0.151
0.164
0.177
0.189
0.202
0.215
0.227
0.240
0.252
0.265
0.278
0.290
0.303
0.316
0.328
0.341
0.353
0.366
0.379
“X” =
0.898
0.988
1.078
1.168
1.257
1.347
1.437
1.527
1.617
1.707
1.796
1.886
1.976
2.066
2.156
2.245
2.335
2.425
2.515
2.605
2.694
Roll Radius
0.907
0.998
1.088
1.179
1.270
1.360
1.451
1.542
1.633
1.723
1.814
1.905
1.995
2.086
2.177
2.267
2.358
2.449
2.540
2.630
2.721
Loft Angle
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
8.5
Face Height
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
1.05
1.1
1.15
1.2
1.25
1.3
1.35
1.4
1.45
1.5
Calcalations
A =
0.037
0.041
0.044
0.048
0.052
0.055
0.059
0.063
0.067
0.070
0.074
0.078
0.081
0.085
0.089
0.092
0.096
0.100
0.103
0.107
0.111
C =
0.006
0.006
0.007
0.007
0.008
0.008
0.009
0.009
0.010
0.010
0.011
0.012
0.012
0.013
0.013
0.014
0.014
0.015
0.015
0.016
0.017
h =
0.037
0.041
0.045
0.049
0.052
0.056
0.060
0.064
0.067
0.071
0.075
0.078
0.082
0.086
0.090
0.093
0.097
0.101
0.105
0.108
0.112
Diameter =
1.710
1.881
2.052
2.223
2.394
2.565
2.736
2.907
3.078
3.249
3.420
3.591
3.762
3.933
4.104
4.275
4.446
4.617
4.788
4.959
5.130
D =
0.247
0.272
0.297
0.321
0.346
0.371
0.396
0.420
0.445
0.470
0.495
0.519
0.544
0.569
0.593
0.618
0.643
0.668
0.692
0.717
0.742
B =
0.253
0.278
0.303
0.329
0.354
0.379
0.404
0.430
0.455
0.480
0.506
0.531
0.556
0.581
0.607
0.632
0.657
0.682
0.708
0.733
0.758
E=
0.126
0.139
0.152
0.164
0.177
0.190
0.202
0.215
0.227
0.240
0.253
0.265
0.278
0.291
0.303
0.316
0.329
0.341
0.354
0.367
0.379
“Y” =
0.126
0.139
0.152
0.164
0.177
0.190
0.202
0.215
0.227
0.240
0.253
0.265
0.278
0.291
0.303
0.316
0.329
0.341
0.354
0.367
0.379
“X” =
0.846
0.930
1.015
1.099
1.184
1.269
1.353
1.438
1.522
1.607
1.691
1.776
1.861
1.945
2.030
2.114
2.199
2.283
2.368
2.452
2.537
Roll Radius
0.855
0.941
1.026
1.112
1.197
1.283
1.368
1.454
1.539
1.625
1.710
1.796
1.881
1.967
2.052
2.138
2.223
2.309
2.394
2.480
2.565
as comprising FIGS. 20A through 20E, inclusive, of the Drawings.
19 . The improved curved strike face putter of claim 18 , wherein said true roll impact zone falls within the range of approximately 0.015 inch to 0.073 inch below the ball's equator.
20 . An improved vertically-curved face golf putter formed with a curved strike for having an optimal roll radius so as to permit consistently impacting a golf ball, regardless of a specific golfers putting stroke style, within the true roll impact zone below the golf ball's equator, said curved strike face having a given face height and a selected static loft, said face height and static loft, and the resultant said optimal roll radius thereof, are as set forth in the charts comprising FIGS. 20A through 20E, inclusive, of the Drawings.
21 . The improved vertically-curved face golf putter of claim 20 , and wherein the required X- and Y- displacements for locating the center of curvature for the resultant said optimal roll radius are as given in the charts comprising FIGS. 20A through 20E, inclusive, of the Drawings.
22 . The invention of claim 20 , and wherein said putter includes two different roll radii, a first roll radius being the primary strike roll radius for impacting the golf ball in the true roll impact zone, said first roll radius vertically extending within the range of approximately 45% to 85% of the lower height of said curved strike face; a second roll radius being provided to create the visual appearance of a curved strike face, said second roll radius vertically extending within the range of approximately 15% to 40% of the upper height of said curved strike face; and the radius of said second roll radius is less than the radius of said first roll radius.
23 . The invention of claim 22 , and a third roll radius for said curved strike face and formed at the lowermost edge portion of said curved strike face.
24 . The invention of claim 22 , wherein the value for said first roll radius is selected from the charts of FIGS. 20A to 20 E, inclusive, of the Drawings.Join the waitlist — get patent alerts
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