EP 0897732 A3 20010606 - 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 1-7
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)
Citation (search report)
- [XA] GB 2301291 A 19961204 - BRIDGESTONE SPORTS CO LTD [JP]
- [A] GB 2298583 A 19960911 - BRIDGESTONE SPORTS CO LTD [JP]
- [A] GB 2306118 A 19970430 - SUMITOMO RUBBER IND [JP]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
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