US 2003/0083155 A1Published application

Three-piece solid golf ball

AssigneeSRI Sports Limited

InventorsSeiichiro Endo, Keiji Ohama

Life of this patent

Estimating the term…

Loading patent…

Abstract

The present invention provides a three-piece solid golf ball, of which flight distance is improved by accomplishing high launch angle and low spin amount in initial flight performance, while maintaining soft and good shot feel when hitting at low head speed. The present invention relates to a three-piece solid golf ball comprising a center, intermediate layer and cover, wherein the center has a deformation amount of 3.5 to 5.5 mm, a hardness difference (HS−HC) from a central point hardness (HC) of 10 to 40 and a surface hardness HS of 36 to 50, base resins of the intermediate layer and cover are formed from thermoplastic resin, and the intermediate layer has a hardness HM of 36 to 50, the cover has a hardness HL of 58 to 69, a hardness difference (HS−HM) is 0 to 15, and (HL−HM) is 10 to 28.

Claims2

Dependent claims

A three-piece solid golf ball comprising a center, an intermediate layer formed on the center and a cover covering the intermediate layer, wherein

the center has a deformation amount of 3.5 to 5.5 mm, when applying from an initial load of 98 N to a final load of 1275 N, a hardness difference in Shore D hardness (HS−HC) between a surface hardness (HS) and a central point hardness (HC) of 10 to 40, and the surface hardness (HS) of 36 to 50,
a base resin of the intermediate layer is formed from thermoplastic resin having a weight ratio of thermoplastic elastomer to ionomer resin of 20/80 to 70/30, and the intermediate layer has a hardness (HM) in Shore D hardness of 36 to 50,
a base resin of the cover is formed from thermoplastic resin mainly comprising ionomer resin, and the cover has a hardness (HL) in Shore D hardness of 58 to 69, and
a hardness difference (HS−HM) between the surface hardness of the center (HS) and the hardness of the intermediate layer (HM) is within the range of 0 to 15, and a hardness difference (HL−HM) between the hardness of the cover (HL) and the hardness of the intermediate layer (HM) is within the range of 10 to 28.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 10/212,117Filed 6 Aug 2002
Priority: JP 250339/200121 Aug 2001
Published: 1 May 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

A63B 37/0003
Solid balls; Rigid hollow balls; Marbles: golf balls
A63B 37/00621
Hardness: centre hardness
A63B 37/00622
Hardness: surface hardness
A63B 37/00921
Hardness distribution amongst different ball layers: whereby hardness of the cover is higher than hardness of the intermediate layers

Family

US 7,192,366 B2Related patent
US 2003/0083155 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key