Particular Dimple Detail Patents (Class 473/383)
  • Patent number: 10463918
    Abstract: Golf balls including at least one modified dimple group are disclosed. The modified dimple group comprises one or more modified dimples forming an axially symmetric pattern about a Correction Area Centroid located on an axis of symmetry at a latitude greater than 0°, where 0° represents the hemispherical pole and 90° represents the equator. The modified dimples can be altered, for example, by changing dimple coverage, dimple diameter, dimple depth, dimple edge angle, dimple volume, dimple cross-sectional shape, and/or dimple plan shape. Optionally, the dimples have a catenary cross-sectional shape and the modified dimples are altered by changing the shape factor and/or chord depth. Such modifications preferably produce a golf ball that flies more consistently regardless of orientation when struck than a corresponding golf ball without such modifications.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: November 5, 2019
    Assignee: Acushnet Company
    Inventors: Michael R. Madson, Nicholas M. Nardacci
  • Patent number: 10369417
    Abstract: The present invention provides a golf ball having an aerodynamic subsurface for packing dimples. More particularly, the invention relates to a golf ball having an exterior surface and at least a first subsurface containing at least two dimples located solely on the subsurface and lying below the exterior surface of the golf ball. A transition zone between the exterior surface and the subsurface is disclosed having an angle of transition and a top radius and a bottom radius.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: August 6, 2019
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson, Chris Hixenbaugh
  • Patent number: 10363457
    Abstract: The present invention provides a golf ball having an aerodynamic subsurface for packing dimples. More particularly, the invention relates to a golf ball having an exterior surface and at least a first subsurface containing at least two dimples located solely on the subsurface and lying below the exterior surface of the golf ball. The present invention also describes a method for creating the dimple pattern including providing a spherical section having an exterior surface and at least a first subsurface, arranging at least two dimples located solely on the first subsurface and then tessellating the spherical surfaces around the golf ball.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: July 30, 2019
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson, Chris Hixenbaugh
  • Patent number: 10245468
    Abstract: In a golf ball, dimples are arranged on a spherical polyhedron formed by dividing a surface of a sphere using small circles and great circles only on the equator, without arranging the dimples on a spherical polyhedron formed by dividing a surface of a sphere using great circles. The formed spherical polyhedron includes two spherical regular hexagons centered on a pole, twelve near-pole spherical isosceles triangles, twelve near-equator spherical pentagons, and twelve near-equator spherical isosceles triangles, in which the dimples are arranged. Thus, a dimple area ratio may be improved by 2 to 4%, compared to the prior art in which dimples are arranged in spherical polygons of a cubeoctahedron (or an octahedron) divided by great circles.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: April 2, 2019
    Assignee: VOLVIK INC.
    Inventors: In Hong Hwang, Kyung Ahn Moon
  • Patent number: 10241967
    Abstract: The present invention is a golf ball which comprises dimples having a cross-sectional shape defined by the superposition of a weighted profile and one or more additional profiles, and a method of making such dimples. The dimples preferably have a circular boundary and maintain an axis coincident with the center of the circular boundary.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: March 26, 2019
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson
  • Patent number: 10166440
    Abstract: The present invention concerns a golf ball having dimples with a cross-sectional profile comprising a conical top portion and a non-conical bottom portion. More particularly, the profiles of the present invention are defined by three independent parameters: dimple diameter (DD), edge angle (?EDGE), and saucer ratio (Sr). 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.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: January 1, 2019
    Assignee: Acushnet Company
    Inventors: Michael R. Madson, Nicholas M. Nardacci
  • Patent number: 10155136
    Abstract: A golf ball having dimples with cross-sectional profile shapes defined by the product of a base profile and one or more weighting functions, where at least two dimples are modified with a continuous weighting function having different base profiles is disclosed.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: December 18, 2018
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson
  • Patent number: 10150005
    Abstract: Golf balls including at least one modified dimple group are disclosed. The modified dimple group comprises one or more modified dimples forming an axially symmetric pattern about a Correction Area Centroid located on an axis of symmetry at a latitude greater than 0°, where 0° represents the hemispherical pole and 90° represents the equator. The modified dimples can be altered, for example, by changing dimple coverage, dimple diameter, dimple depth, dimple edge angle, dimple volume, dimple cross-sectional shape, and/or dimple plan shape. Optionally, the dimples have a catenary cross-sectional shape and the modified dimples are altered by changing the shape factor and/or chord depth. Such modifications preferably produce a golf ball that flies more consistently regardless of orientation when struck than a corresponding golf ball without such modifications.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: December 11, 2018
    Assignee: Acushnet Company
    Inventors: Michael R. Madson, Nicholas M. Nardacci
  • Patent number: 10046203
    Abstract: The present invention concerns a golf ball having dimples with a cross-sectional profile comprising a conical top portion and a non-conical bottom portion. More particularly, the profiles of the present invention are defined by three independent parameters: dimple diameter (DD), edge angle (?EDGE), and saucer ratio (Sr). 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.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: August 14, 2018
    Assignee: Acushnet Company
    Inventors: Michael R. Madson, Nicholas M. Nardacci
  • Patent number: 10039958
    Abstract: A golf ball includes plural dimples formed on a surface thereof and plural depressed or protruded portions spaced apart from each other and arranged along an outer periphery of at least one of the plural dimples. The plural depressed or protruded portions each has, as a part of a contour thereof, a shape substantially similar to a part of a contour of the dimple surrounded with the plural depressed or protruded portions. The plural depressed or protruded portions each has a length of more than 1/10 and less than ½ of an outer peripheral length of the dimple surrounded with the plural depressed or protruded portions.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: August 7, 2018
    Assignee: Bridgestone Sports Co., Ltd.
    Inventor: Katsunori Sato
  • Patent number: 9950215
    Abstract: The present invention is directed to a golf ball having a non-planar parting line about non-circular dimples on its spherical surface. The parting line comprises non-concentric arcs having straight connecting line segments between the arcs. Each arc maintains a tangency with its connecting lines and a relief distance greater than or equal to 0.003 inches when measured from an average non-circular dimple diameter to one of the non-concentric arcs and an absolute relief distance of at least 0.001 inches when measured from all points on the non-circular dimple perimeter to one of the non-concentric arcs. The sum of the lengths of the non-concentric arcs relates to the sum of the straight connecting line segments according to the equation: (0.15)?LARCS??LLINES?(0.50)?LARCS.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: April 24, 2018
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson, David P. Hunt
  • Patent number: 9868032
    Abstract: Golf ball dimples having a cross-sectional profile shape defined by the product of a base profile and one or more weighting functions are disclosed.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: January 16, 2018
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson
  • Patent number: 9868031
    Abstract: Golf ball dimples having a cross-sectional profile shape defined by the product of a base profile and one or more weighting functions are disclosed.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: January 16, 2018
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson
  • Patent number: 9861859
    Abstract: Golf ball dimples having a cross-sectional profile shape defined by the product of a base profile and one or more weighting functions are disclosed.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: January 9, 2018
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson
  • Patent number: 9849340
    Abstract: A golf ball 2 has a large number of dimples 10 on a surface thereof. The contours of the dimples 10 are non-circular. A standard deviation of areas of the dimples 10 is equal to or less than 1.7 mm2. A ratio of a total area of the dimples 10 relative to a surface area of a phantom sphere of the golf ball 2 is equal to or greater than 80%. By comparting lines CS obtained by projecting sides of a regular dodecahedron, which is inscribed in the phantom sphere, onto the phantom sphere, a surface of the phantom sphere can be divided into 12 units Ut each of which meets the following mathematical formula (I): ?2?(Nt/12)?Nu?2??(I), where Nt represents the total number of the dimples 10 and Nu represents the number of the dimples 10 on one unit.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: December 26, 2017
    Assignee: DUNLOP SPORTS CO. LTD.
    Inventors: Kohei Mimura, Takahiro Sajima, Hyoungchol Kim
  • Patent number: 9844701
    Abstract: The present invention provides a golf ball having an outer surface comprising a plurality of dimples covering greater than 70 percent of the outer surface, wherein at least 20 percent of the dimples incorporate directional surface texturing therein. The directional surface texturing preferably comprises substantially parallel channels or protrusions formed within the dimples.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: December 19, 2017
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson, Chris Hixenbaugh
  • Patent number: 9789363
    Abstract: The present invention concerns a golf ball having dimples with a cross-sectional profile comprising a conical top portion and a non-conical bottom portion. More particularly, the profiles of the present invention are defined by three independent parameters: dimple diameter (DD), edge angle (?EDGE), and saucer ratio (Sr). 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.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: October 17, 2017
    Assignee: Acushnet Company
    Inventors: Michael R. Madson, Nicholas M. Nardacci
  • Patent number: 9776044
    Abstract: In a golf ball including dimples having coma shapes, the dimples are arranged such that one comma shaped dimple replaces a circular dimple, two or more comma shaped dimples of different sizes replace one circular dimple, comma shaped dimples having different shapes are arranged in a mixed type arrangement, circular dimples and comma shaped dimples are arranged in a mixed type arrangement, or a discontinuous annular dimple is added to the comma shaped dimples. Thus, a disadvantage of a large circular dimple may be removed and simultaneously a golf ball with stable flight capability and a long flight distance may be provided.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: October 3, 2017
    Assignee: VOLVIK, INC.
    Inventors: In Hong Hwang, Kyung Ahn Moon
  • Patent number: 9764193
    Abstract: Golf balls including at least one modified dimple group are disclosed. The modified dimple group comprises one or more modified dimples forming an axially symmetric pattern about a Correction Area Centroid located on an axis of symmetry at a latitude greater than 0°, where 0° represents the hemispherical pole and 90° represents the equator. The modified dimples can be altered, for example, by changing dimple coverage, dimple diameter, dimple depth, dimple edge angle, dimple volume, dimple cross-sectional shape, and/or dimple plan shape. Optionally, the dimples have a catenary cross-sectional shape and the modified dimples are altered by changing the shape factor and/or chord depth. Such modifications preferably produce a golf ball that flies more consistently regardless of orientation when struck than a corresponding golf ball without such modifications.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: September 19, 2017
    Assignee: Acushnet Company
    Inventors: Michael R. Madson, Nicholas M. Nardacci
  • Patent number: 9744405
    Abstract: In a golf ball including dimples having comma shapes, the dimples are arranged such that one comma shaped dimple replaces a circular dimple, two or more comma shaped dimples of different sizes replace one circular dimple, comma shaped dimples having different shapes are arranged in a mixed type arrangement, circular dimples and comma shaped dimples are arranged in a mixed type arrangement, or a discontinuous annular dimple is added to the comma shaped dimples. Thus, a disadvantage of a large circular dimple may be removed and simultaneously a golf ball with stable flight capability and a long flight distance may be provided.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: August 29, 2017
    Assignee: VOLVIK INC.
    Inventors: In Hong Hwang, Kyung Ahn Moon
  • Patent number: 9707451
    Abstract: The present invention is directed to golf balls having improved aerodynamic performance due, at least in part, to the alteration of the dimple surfaces. In particular, the present invention relates to a golf ball that includes at least a portion of its dimples having circular perimeters and dimple profiles having a concentric groove on the surface of the dimple. The golf ball dimples of the present invention provide golf ball surfaces having unique appearances, while maintaining ideal aerodynamic characteristics.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: July 18, 2017
    Assignee: Acushnet Company
    Inventors: Michael R. Madson, Nicholas M. Nardacci, Chris Hixenbaugh
  • Patent number: 9656125
    Abstract: A golf ball 2 has, on a surface thereof, a plurality of types of dimples 8 having different diameters from each other. A standard deviation V? of the volumes of all the dimples 8 is equal to or less than 0.095 mm3. The ratio (V?/D?) of the standard deviation V? to a standard deviation D? of the diameters of all the dimples 8 is equal to or less than 0.35. Preferably, the shape of each dimple 8 is a portion of a spherical surface. The standard deviation V? is preferably equal to or less than 0.087 mm3. The ratio (V?/D?) is preferably equal to or less than 0.29.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: May 23, 2017
    Assignee: DUNLOP SPORTS CO. LTD.
    Inventor: Hirotaka Nakamura
  • Patent number: 9649536
    Abstract: The present invention is directed to a golf ball comprising of non-concentric arcs defining a non-planar parting line on its spherical surface resulting in having a large size disparity between non-circular dimples in one hemisphere and adjacent non-circular dimples from the opposing hemisphere. The parting line is produced by a pair of adjacent non-circular dimples, wherein ?d indicates the average non-circular dimple diameter and N indicates dimples from the Northern hemisphere and those from the Southern hemisphere are indicated by S. A large disparity may be created, if the following condition is satisfied: ? d ? ( N ) ? d ? ( S ) > 1.25 ? ? or ? ? ? d ? ( N ) ? d ? ( S ) < 0.80 .
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: May 16, 2017
    Assignee: Acushnet Company
    Inventors: Nicholas M. Nardacci, Michael R. Madson, David P. Hunt
  • Patent number: 9421423
    Abstract: Non-circular dimples such as oval form dimples are provided on the spherical surface of a ball body. A golf ball includes a spherical land surface of the ball body and a dimple pattern of a plurality of dimples formed on the spherical land surface, the spherical surface of the ball body being divided into a plurality of spherical surface parts (land surfaces) with each polygon faces of polyhedron which is virtually inscribed in said spherical surface of ball body, by a projection method from each polygon faces of the inscribed polyhedron, on each spherical surface parts some or all of the dimples being formed as non-circular dimple having a width of more than 1.5 mm and a length of more than 2 times of the width and the dimple pattern is disposed so as to make vortices generated in the non-circular dimples flow out in at least two different directions.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: August 23, 2016
    Assignee: HANABI CO., LTD.
    Inventors: Sunao Umemura, Mitsuhiro Saso
  • Patent number: 9403063
    Abstract: The present invention relates to golf balls, specifically to a golf ball comprising an aerodynamic pattern having novel shaped dimple structures which reduce the variation in airflow turning angle thereby improving the golf ball's flight performance. The dimple structures have a conical shaped base with a dimple in the center and reduced or no flat land areas between the dimples.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: August 2, 2016
    Assignee: Acushnet Company
    Inventors: Steven Aoyama, Traci L. Olson
  • Patent number: 9259623
    Abstract: Golf balls include: (a) a golf ball having a first set of construction specifications; (b) a coating of the golf ball having an exterior surface and (c) the exterior surface having an enhanced micro surface roughness. The enhanced micro surface roughening affects the aerodynamic properties of the ball as compared to golf balls having the same set of construction specifications but without enhanced micro surface roughness.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: February 16, 2016
    Assignee: Nike International, Ltd.
    Inventors: Derek A. Fitchett, Nicholas Yontz, Johannes Anderl
  • Patent number: 9248345
    Abstract: Embodiments of golf balls and methods to manufacture golf balls are generally described herein. In one example, a golf ball may include a plurality of round dimples and a plurality of non-round dimples. Each round dimple may have a dimple diameter, and each non-round dimple may have a dimple diagonal. Other examples and embodiments may be described and claimed.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: February 2, 2016
    Assignee: Slick Golf, LLC
    Inventors: Robert R. Parsons, Bradley D. Schweigert
  • Patent number: 9199133
    Abstract: Golf balls having an exterior surface with a predetermined area which is smaller than the entire surface area of the exterior surface and includes enhanced micro surface roughness. The enhanced micro surface roughness affects the aerodynamic properties of the ball as compared to golf balls having the same set of construction specifications but without enhanced micro surface roughness.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: December 1, 2015
    Assignee: NIKE, Inc.
    Inventors: Derek A. Fitchett, Nicholas Yontz, Johannes Anderl
  • Patent number: 9186558
    Abstract: Golf balls having an exterior surface with a predetermined area which is smaller than the entire surface area of the exterior surface, includes enhanced micro surface roughness, and is in the form of an asymmetrical pattern on the exterior surface of the golf ball. The enhanced micro surface roughness affects the aerodynamic properties of the ball as compared to golf balls having the same set of construction specifications but without enhanced micro surface roughness.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: November 17, 2015
    Assignee: NIKE, Inc.
    Inventors: Derek A. Fitchett, Nicholas Yontz, Johannes Anderl
  • Patent number: 9108085
    Abstract: Golf balls include: (a) a golf ball having a first set of construction specifications; (b) a coating of the golf ball having an exterior surface and (c) the exterior surface having an enhanced micro surface roughness. The enhanced micro surface roughening affects the aerodynamic properties of the ball as compared to golf balls having the same set of construction specifications but without enhanced micro surface roughness.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: August 18, 2015
    Assignee: NIKE, Inc.
    Inventors: Derek A. Fitchett, Nicholas Yontz, Johannes Anderl
  • Patent number: 9033827
    Abstract: Golf ball dimples having a cross-sectional profile shape defined by a semi-cubical parabola function are disclosed.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: May 19, 2015
    Assignee: Acushnet Company
    Inventors: Michael R. Madson, Nicholas M. Nardacci, Chris Hixenbaugh
  • Patent number: 8992344
    Abstract: A golf ball may include an inner core layer and an outer cover layer disposed radially outward of the inner core layer. The outer cover layer may be formed of an outer cover layer material having one or more grooves extending radially inward from an outer surface of the outer cover layer. In addition, the golf ball may include a groove material disposed within the one or more grooves. The groove material may have a compressibility that is different from a compressibility of the outer cover layer material. Also, the outer surface of the groove material may extend radially outward beyond the outer surface of the outer cover layer.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: March 31, 2015
    Assignee: Nike, Inc.
    Inventor: Mark Alan
  • Patent number: 8986136
    Abstract: A method of making a golf ball may include molding at least one core layer and molding an outer cover layer radially outward of the at least one core layer, from an outer cover layer material, including forming one or more grooves extending radially inward from an outer surface of the outer cover layer. The method may also include molding a groove material within the one or more grooves, the groove material having a compressibility that is different from a compressibility of the outer cover layer material. In addition, molding the groove material may include forming the groove material such that an outer surface of the groove material extends radially outward beyond the outer surface of the outer cover layer.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: March 24, 2015
    Assignee: Nike Inc.
    Inventor: Mark Alan
  • Publication number: 20150057106
    Abstract: [Problem to be solved] To provide a golf ball with improved flight distance due to improvement in aerodynamic properties by means of contriving dimple designs. The golf ball is in the shape of a sphere and is composed of dimples and lands excluding dimples, wherein said dimples are formed by elliptical dimples together with circular dimples, wherein one said elliptical dimple overlaps said circular dimples at both end parts in its major axis direction, said circular dimples and said elliptical dimples are connected with each other, and one said land is formed between three said elliptical dimples.
    Type: Application
    Filed: January 23, 2012
    Publication date: February 26, 2015
    Inventor: Yoshihiro Kishishita
  • Patent number: 8956252
    Abstract: A golf ball 2 includes a spherical core 4 and a cover 6 positioned outside the core 4. The golf ball 2 further has dimples 8 on a surface thereof. The core 4 is obtained by crosslinking a rubber composition. The difference between a hardness H(5.0) at a point that is located at a distance of 5 mm from the central point of the core 4, and a hardness Ho at the central point is equal to or greater than 6.0. The difference between a hardness H(12.5) at a point that is located at a distance of 12.5 mm from the central point, and the hardness H(5.0) is equal to or less than 4.0. The difference between a hardness Hs at the surface of the core 4 and the hardness H(12.5) is equal to or greater than 10.0. The difference between the hardness Hs and the hardness Ho is equal to or greater than 22.0. There is no zone in which a hardness decreases from the central point to the surface. The rubber composition of the core 4 includes 2-naphthalenethiol. A cross-sectional shape of each dimple 8 is a wave-like curve.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: February 17, 2015
    Assignee: SRI Sports Limited
    Inventors: Hirotaka Nakamura, Kazuhiko Isogawa, Seiichiro Endo, Hyoungchol Kim
  • Publication number: 20150045150
    Abstract: Golf ball dimples having a non-circular plan shape and a cross-sectional profile shape defined by the envelope of the response of an under damped harmonic oscillator are disclosed.
    Type: Application
    Filed: October 27, 2014
    Publication date: February 12, 2015
    Applicant: Acushnet Company
    Inventor: Chris Hixenbaugh
  • Publication number: 20150031476
    Abstract: Provided is a spherical polyhedron division structure of a golf ball where dimples are arranged to have a well-defined symmetry and a dimple pattern. In the spherical polyhedron division structure, wherein an arbitrary point on a surface of a spherical body constituting a golf ball is defined as a pole, a great circle dividing the spherical body into a northern hemisphere and a southern hemisphere with respect to the pole as a reference point is defined as an equator, the surface of the spherical body is divided into six areas formed by segments connecting the pole and points obtained by dividing the equator in units of 60°, each area is divided into spherical polygons formed by four spherical rectangles and two spherical triangles having sides with different lengths, and the spherical polygons arranged in different adjacent areas are symmetric with each other.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 29, 2015
    Applicant: VOLVIK INC.
    Inventors: In Hong HWANG, Kyung Ahn MOON
  • Publication number: 20150031477
    Abstract: A golf ball has a large number of dimples on a surface thereof. The golf ball meets the following mathematical formula (I): Su?9.0*So?6.04??(I), Where: So represents a ratio of a sum of spherical surface areas of all the dimples to a surface area of a phantom sphere of the golf ball; and Su represents a standard deviation (mm2) of the spherical surface areas of all the dimples. Preferably, the ratio So is equal to or greater than 0.780. Preferably, the standard deviation Su is equal to or less than 2.150 mm2. Preferably, a number of the dimples is equal to or greater than 300 but equal to or less than 390. Preferably, an average Sa of the spherical surface areas s of all the dimples is equal to or greater than 14.00 mm2.
    Type: Application
    Filed: July 28, 2014
    Publication date: January 29, 2015
    Inventors: Takahiro SAJIMA, Hyoungchol KIM
  • Patent number: 8905865
    Abstract: A golf ball includes a core, a cover covering the core, and a clear layer covering the cover. The cover has dimples and a land. An xy coordinate of a hue of an outermost layer in the core excluding a colorless and transparent layer is included in any one of eight zones I to VIII. An xy coordinate of a hue of the cover is included in any one of the eight zones I to VIII which is different from and is not adjacent to the zone in which the xy coordinate of the hue of the outermost layer is included. A ratio (T1/T2) of a thickness T1 of the cover immediately below a deepest portion of each dimple and a thickness T2 of the cover immediately below the land is equal to or greater than 0.50 but equal to or less than 0.80.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: December 9, 2014
    Assignee: Dunlop Sports Co., Ltd.
    Inventor: Kosuke Tachibana
  • Patent number: 8905866
    Abstract: A method for arranging dimples on a golf ball surface includes: determining an initial arrangement of dimples; dividing the surface of a golf ball into multiple equivalent unit regions; based on a dimple interval between two freely selected dimples within one of the unit regions, determining whether or not the two dimples are in an adjacent relationship to each other; and changing the positions of the two dimples corresponding to the dimple interval between the two freely selected dimples in the adjacent relationship, wherein determining of the adjacent relationship and changing of the position are repeated until the maximum interval, which is a maximum value of the dimple interval between two freely selected dimples in the adjacent relationship in the unit region, falls below a predetermined value.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: December 9, 2014
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Takuma Nakagawa, Katsunori Sato
  • Publication number: 20140349782
    Abstract: A golf ball having a plurality of dimples formed on its outer surface, the outer surface of the golf ball being divided into plural areas, a first group of areas containing a plurality of first dimples and a second group of areas containing a plurality of second dimples, each area of the second group abutting one or more areas of the first group, the first and second groups of areas and dimple shapes and dimensions being configured such that the golf ball is spherically symmetrical as defined by the United States Golf Association (USGA) Symmetry Rules, and such that the golf ball exhibits a negative inflection in drag coefficient (CD) during the flight of the golf ball.
    Type: Application
    Filed: August 4, 2014
    Publication date: November 27, 2014
    Applicant: AERO-X GOLF, INC.
    Inventors: David L. Felker, Douglas C. Winfield, Rocky Lee
  • Patent number: 8894510
    Abstract: Golf ball dimples having a cross-sectional profile shape defined by the envelope of the response of an under damped harmonic oscillator are disclosed.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: November 25, 2014
    Assignee: Acushnet Company
    Inventor: Chris Hixenbaugh
  • Patent number: 8888612
    Abstract: Provided is a golf ball having an improved structure of a plurality of circular dimples formed on a surface of the golf ball to improve flight stability and increase a flying distance. With a golf ball having a plurality of circular dimples on a surface thereof, a plurality of concaves, each of which has a shape of an arc concentric with the circular dimple, are formed at a predetermined interval along a circumference of the entire or a portion of the circular dimple.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: November 18, 2014
    Assignee: Volvik Inc.
    Inventors: In Hong Hwang, Kyung Ahn Moon
  • Patent number: 8834302
    Abstract: A cross-sectional shape of each of dimples 8 of a golf ball is a wave-like curve. The wave-like curve has two first projections 16, two second projections 18, two first recesses 20, and two second recesses 22. A circular arc 14 passes through one edge Ed, a deepest point Pd, and another edge Ed. Each first projection 16 is located above the circular arc 14. Each second projection 18 is located above the circular arc 14. Each first recess 20 is located below the circular arc 14. Each second recess 22 is located below the circular arc 14. The ratio of the distance Lp from an edge Ed to a peak Pp to the radius (Di/2) of the dimple 8 is equal to or greater than 20% but equal to or less than 70%.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: September 16, 2014
    Assignee: Sri Sports Limited
    Inventors: Hirotaka Nakamura, Hyoungchol Kim
  • Patent number: 8821320
    Abstract: A golf ball includes a plurality of circular dimples formed on the surface thereof, each of the circular dimples having a flat bottom surface; and a plurality of noncircular dimples formed on the surface of the golf ball, at least about 10 percent of dimples of all the dimples on the surface being the noncircular dimples, wherein a boundary line between a land part of the golf ball and the noncircular dimples each comprise a curved line part and a straight line part. The plurality of noncircular dimples each having a flat bottom surface. The bottom surface of the noncircular dimple may has a planar shape approximately similar to the boundary line. The lift coefficient CL at Re 70000/2000 rpm may be at least about 70 percent of the lift coefficient CL at Re 80000/2000 rpm, and the drag coefficient CD at Re 180000/2520 rpm is up to about 0.225.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: September 2, 2014
    Assignee: Bridgestone Sports Co., Ltd.
    Inventor: Katsunori Sato
  • Patent number: 8808113
    Abstract: A golf ball having an improved surface pattern is disclosed. The golf ball has one or more channels on its surface. The channels form spherical polygonal tiles that may include a plurality of dimples. These dimples may be circular or polygonal in shape.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: August 19, 2014
    Assignee: Acushnet Company
    Inventors: Steven Aoyama, Michael J. Sullivan, Edmund A. Hebert
  • Patent number: 8795103
    Abstract: A golf ball having a plurality of dimples formed on its outer surface, the outer surface of the golf ball being divided into plural areas, a first group of areas containing a plurality of first dimples and a second group of areas containing a plurality of second dimples, each area of the second group abutting one or more areas of the first group, the first and second groups of areas and dimple shapes and dimensions being configured such that the golf ball is spherically symmetrical as defined by the United States Golf Association (USGA) Symmetry Rules, and such that the golf ball exhibits a negative inflection in drag coefficient (CD) during the flight of the golf ball.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: August 5, 2014
    Assignee: Aero-X Golf, Inc.
    Inventors: David L. Felker, Douglas C. Winfield, Rocky Lee
  • Publication number: 20140200099
    Abstract: A golf hall dimple having a plurality of arms wherein each arm includes a leading edge, a trailing edge, side walls, and a sloped floor. The dimples of the invention may be included in a dimple pattern that may also include other types of dimples.
    Type: Application
    Filed: January 14, 2013
    Publication date: July 17, 2014
    Applicant: ACUSHNET COMPANY
    Inventor: Steven Aoyama
  • Publication number: 20140187355
    Abstract: Golf ball dimples having a cross-sectional profile shape defined by the envelope of the response of an under damped harmonic oscillator are disclosed.
    Type: Application
    Filed: December 31, 2012
    Publication date: July 3, 2014
    Applicant: ACUSHNET COMPANY
    Inventor: Chris Hixenbaugh
  • Publication number: 20140187356
    Abstract: A golf ball 2 has a large number of dimples 8 on a surface thereof. A trajectory of the golf ball 2 is divided into first to fourth segments. An average CD1 of drag coefficients CD and an average CL1 of lift coefficients CL in the first segment are equal to or less than 0.225 and 0.180, respectively. An average CD2 of drag coefficients CD and an average CL2 of lift coefficients CL in the second segment are equal to or less than 0.250 and 0.220, respectively. An average CD3 of drag coefficients CD and an average CL3 of lift coefficients CL in the third segment are equal to or greater than 0.260 and 0.220, respectively. An average CD4 of drag coefficients CD and an average CL4 of lift coefficients CL in the fourth segment are equal to or greater than 0.250 and 0.200, respectively.
    Type: Application
    Filed: December 9, 2013
    Publication date: July 3, 2014
    Applicant: DUNLOP SPORTS CO. LTD.
    Inventors: Hyoungchol KIM, Masahide ONUKI