IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0407824
(2009-03-20)
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등록번호 |
US-8137217
(2012-03-20)
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발명자
/ 주소 |
- Madson, Michael R.
- Nardacci, Nicholas M.
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출원인 / 주소 |
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대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
8 |
초록
▼
The present invention concerns a golf ball with dimples having a cross-sectional profile comprising a conical base shape and a spherical cap with a prescribed point of tangency to the cone sidewall. More particularly, the conical profiles of the present invention are defined by three independent par
The present invention concerns a golf ball with dimples having a cross-sectional profile comprising a conical base shape and a spherical cap with a prescribed point of tangency to the cone sidewall. More particularly, the conical profiles of the present invention are defined by three independent parameters: dimple diameter (DD), edge angle (ΦEDGE), and saucer ratio (Sr) which is a measure of the relative curvature of the dimple bottom. These parameters fully define the dimple shape and allow for greater flexibility in constructing a dimple profile versus conventional spherical dimples. Further, conical dimples provide a unique dimple cross-section which is visually distinct.
대표청구항
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1. A golf ball dimple consisting of a top conical edge and a bottom spherical cap, and having a defined point of tangency at an intersection between the top conical edge and the bottom spherical cap, wherein a difference between a slope of the conical edge and a slope of the spherical cap at the poi
1. A golf ball dimple consisting of a top conical edge and a bottom spherical cap, and having a defined point of tangency at an intersection between the top conical edge and the bottom spherical cap, wherein a difference between a slope of the conical edge and a slope of the spherical cap at the point of tangency is less than about 2°, wherein said dimple has a shape defined by at least a saucer ratio (Sr) and edge angle (ΦEDGE),wherein Sr is defined as a ratio of dimple diameter (DD) to spherical cap diameter (DS) and the value of said ratio is between about 0.05 and about 0.75, andwherein ΦEDGE is defined as an angle between a first line T1 tangent to the conical edge and a second line T2 tangent to a phantom spherical surface. 2. The golf ball dimple according to claim 1, wherein the difference between the slope of the conical edge and the slope of the spherical cap is less than about 1°. 3. The golf ball dimple according to claim 1, wherein the slope of the conical edge and the slope of the spherical cap is about equal. 4. The golf ball dimple according to claim 1, wherein ΦEDGE is calculated by the mathematical equation ΦEDGE=ΦCAP+ΦCHORD, wherein ΦCAP is defined by the equation sin−1(DD/DB), wherein DD represents the dimple diameter and DB represents the ball diameterwherein ΦCHORD is defined by the equation tan−1{(dCHORD−dSAUCER)÷(RD−RS)}, wherein dCHORD represents chord depth, RD represents dimple radius, and RS represents saucer radius, and dSAUCER is defined by the equation dSAUCER=rAPEX√{square root over ((rAPEX2−RS2))} and rAPEX is defined by the equation rAPEX=RS/sin(ΦCHORD). 5. The golf ball dimple according to claim 1, wherein said dimple has a volume ratio (VR) defined by the ratio of dimple volume (VD) to theoretical cylindrical volume (VC) and the value of said ratio is in the range of about ⅓≦VR≦½, wherein VD is defined by the equation VD=[⅓πD2(dCHORD)]−[⅓πRS2(dSAUCER)]+[π(dSAUCER)(3RS2dSAUCER2)÷6], wherein dCHORD represents chord depth, RD represents dimple radius, RS represents saucer radius, andwherein VC is defined by the equation πRD2 (dCHARD). 6. The golf ball dimple according to claim 1, wherein said dimple has a saucer ratio Sr of about 0.10≦Sr≦0.70. 7. The golf ball dimple according to claim 1, wherein said dimple has a saucer ratio Sr of about 0.20≦Sr≦0.60. 8. The golf ball dimple according to claim 1, wherein said dimple has a saucer ratio Sr of about 0.25≦Sr≦0.55. 9. The golf ball dimple according to claim 1, wherein said dimple has a saucer ratio Sr of about 0.30≦Sr≦0.50. 10. The golf ball dimple according to claim 1, wherein said dimple has a saucer ratio Sr of about 0.35≦Sr≦0.45. 11. A golf ball comprising: a generally spherical surface;a plurality of dimples separated by a land area formed on the surface, wherein at least one of the dimples consists of a top conical edge and a bottom spherical cap, and having a defined point of tangency at an intersection between the top conical edge and the bottom spherical cap, wherein a difference between a slope of the conical edge and a slope of the spherical cap at the point of tangency is less than about 2°,wherein said dimple has a shape defined by at least a saucer ratio (Sr) and edge angle (ΦEDGE),wherein Sr is defined as a ratio of dimple diameter (DD) to spherical cap diameter (DS) and the value of said ratio is between about 0.05 and about 0.75, andwherein ΦEDGE is defined as an angle between a first line T1 tangent to the conical edge and a second line T2 tangent to a phantom spherical surface. 12. The golf ball according to claim 11, wherein the difference between the slope of the conical edge and the slope of the spherical cap is less than about 1°. 13. The golf ball dimple according to claim 11, wherein the slope of the conical edge and the slope of the spherical cap is about equal. 14. The golf ball according to claim 11, wherein ΦEDGE is calculated by the mathematical equation ΦEDGE=ΦCAP+ΦCHORD, wherein ΦCAP is defined by the equation sin−1(DD/DB), wherein DD represents the dimple diameter and DB represents the ball diameterwherein ΦCHORD is defined by the equation tan−1{(dCHORD−dSAUCER)÷(RD−RS)}, wherein dCHORD represents chord depth, dSAUCER represents saucer depth, RD represents dimple radius, and RS represents saucer radius, andwherein dSAUCER is defined by the equation dSAUCER=rAPEX−√{square root over ((rAPEX2−RS2))} and rAPEX is defined by the equation rAPEX=RS/sin(ΦCHORD). 15. The golf ball according to claim 11, wherein said at least one dimple has a volume ratio (VR) defined by the ratio of dimple volume (VD) to theoretical cylindrical volume (VC) and the value of said ratio is in the range of about ⅓≦VR≦½, wherein VD is defined by the equation VD=[ 1/3πRD2(dCHORD)]−[ 1/3πRS2(dSAUCER)]+[π(dSAUCER) (3RS2+dSAUCER2)÷6], wherein dCHORD represents chord depth, dSAUCER represents saucer depth, RD represents dimple radius, and RS represents saucer radius, andwherein VC is defined by the equation πRD2 (dCHORD). 16. The golf ball according to claim 11, wherein said at least one dimple has a saucer ratio Sr of about 0.10≦Sr≦0.70. 17. The golf ball according to claim 11, wherein said at least one dimple has a saucer ratio Sr of about 0.20≦Sr≦0.60. 18. The golf ball according to claim 11, wherein said at least one dimple has a saucer ratio Sr of about 0.25≦Sr≦0.55. 19. The golf ball according to claim 11, wherein said at least one dimple has a saucer ratio Sr of about 0.30≦Sr≦0.50. 20. The golf ball according to claim 11, wherein said at least one dimple has a saucer ratio Sr of about 0.35≦Sr≦0.45.
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