EP 0897732 B1 20081231 - Multi-piece solid golf ball
Title (en)
Multi-piece solid golf ball
Title (de)
Mehrteiliger, fester Golfball
Title (fr)
Balle de golf solide en plusieurs pièces
Publication
Application
Priority
JP 22890297 A 19970811
Abstract (en)
[origin: EP0897732A2] A multi-piece solid golf ball is provided which is improved in spin, feeling, and durability, prevents its trajectory from rising or dropping, and offers an increased flight distance. A multi-piece solid golf ball comprising a solid core and a cover having an inner and an outer layer surrounding the core wherein the outer cover layer has a surface formed with a plurality of dimples is characterized in that a product of the Shore D hardness of the inner cover layer multiplied by the Shore D hardness of the outer cover layer and a proportion VR (%) of the total of the volumes of dimple spaces each defined below a plane circumscribed by the dimple edge to the overall volume of a phantom sphere given on the assumption that the golf ball surface is free of dimples satisfy any one of the following combinations (1) to (5): (1) the product of Shore D hardnesses of inner and outer cover layers: 1,500 to less than 2,000 VR: 0.8 to 1.1% (2) the product of Shore D hardnesses of inner and outer cover layers: 2,000 to less than 2,500 VR: 0.75 to 1.05% (3) the product of Shore D hardnesses of inner and outer cover layers: 2,500 to less than 3,000 VR: 0.7 to 1% (4) the product of Shore D hardnesses of inner and outer cover layers: 3,000 to less than 3,500 VR: 0.65 to 0.95% (5) the product of Shore D hardnesses of inner and outer cover layers: 3,500 to 4,000 VR: 0.6 to 0.9%, and the dimples include at least three types of dimples which are different in at least one of a diameter, a depth, and a value V0 which is the volume of one dimple space defined below a plane circumscribed by the dimple edge divided by the volume of a cylinder whose bottom is the plane and whose height is the maximum depth of the dimple from the bottom. <IMAGE>
IPC 8 full level
A63B 37/00 (2006.01); A63B 37/04 (2006.01); A63B 37/12 (2006.01)
CPC (source: EP US)
A63B 37/0003 (2013.01 - EP); A63B 37/00215 (2020.08 - EP US); A63B 37/0016 (2013.01 - EP); A63B 37/0019 (2013.01 - EP); A63B 37/002 (2013.01 - EP); A63B 37/0031 (2013.01 - EP); A63B 37/0075 (2013.01 - EP); A63B 37/12 (2013.01 - EP)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0897732 A2 19990224; EP 0897732 A3 20010606; EP 0897732 B1 20081231; DE 69840396 D1 20090212; JP H1157067 A 19990302
DOCDB simple family (application)
EP 98306409 A 19980811; DE 69840396 T 19980811; JP 22890297 A 19970811