Mizuno Corporation

Norikazu Ninomiya

Masao Ogawa

Kenji Onoda

Yuri Naka

Kei Tsuji

Hiroshi Nagao

Yoshihiro Fujikawa

Kensuke Maenaka

Masahiro Michishita

Yudai Washida

Kosuke Miyakoshi

A sports glove includes an index finger portion, a middle finger portion, a ring finger portion, and a little finger portion, as well as a back portion and a first resistance portion. The back portion is connected to the index finger portion, the middle finger portion, the ring finger portion, and the little finger portion. The back portion covers a back of the wearer's hand. The first resistance portion has flexibility. The first resistance portion is disposed on at least one selected from the group consisting of the back portion, the ring finger portion, and the little finger portion such that when the index finger, the middle finger, the ring finger, and the little finger are bent, a magnitude of bending resistance applied to the little finger or the ring finger is greater than that applied to the middle finger or the index finger.

Sports glove

A golf ball includes a land portion, and a plurality of dimples configured to be recessed from the land portion. Each of the plurality of dimples includes a circular bottom face, a circular opening configured to have a larger diameter than the bottom face, and a side face configured to connect the bottom face and the opening. The side face is configured to be linearly inclined so that the diameter of each of the plurality of dimples increases from the bottom face toward the opening. The diameter of the bottom face is 0.45 mm or more and 0.60 mm or less.

Golf ball

The present invention relates to a mold having a parting line along dimples which allows manufacturing of golf balls free from burrs, and to golf balls manufactured using such a mold. The mold of the present invention is provided with a spherical cavity inside thereof; and an upper mold and a lower mold separable from each other, wherein a plurality of convex portions for forming dimples is provided in the inner surface of the cavity, at least one of the plurality of convex portions lies over the equator of the cavity, a parting line, which corresponds to the boundary between the upper mold and the lower mold, extends along the inner surface of the cavity, the parting line comprises first lines extending along the peripheries of the convex portions lying over the equator and second lines connecting the first lines, and the first line is disposed apart from the periphery by a distance of 0.1 to 0.5 mm.

Mold for manufacturing golf balls and golf balls

This invention is directed to A composition for forming a golf ball, the composition comprising polyurethane gel composite particles and at least one base material selected from the group consisting of synthetic resins and elastomers, the polyurethane gel composite particles consisting of colloidal polyurea particles precipitated from a non-aqueous solvent solution of colloidal polyurea and polyurethane gel particles covered with the polyurea particles, the polyurethane gel particles being three-dimensionally crosslinked and each of the polyurethane gel particles being formed of a polyisocyanate compound and a polyethylene oxide group-free, active-hydrogen-containing compound, at least one of the compounds being trifunctional or higher valency, and is also directed to a multi-piece golf ball having one or more layers formed of this composition.

Composition for producing golf balls and multi-piece golf balls

A multi-piece golf ball has a core, an interlayer, and a cover, the corehaving a spherical main partand a plurality of ribsprovided on the surface of the main part, the interlayerbeing inserted into depressions surrounded by the ribs, and the hardness of the interlayerbeing less than that of the core. The multi-piece golf ball can achieve an especially long carry distance.

Multi-piece golf ball and manufacturing method thereof

A multi-piece golf ball has a core (), an interlayer (), and a cover (), the core () being provided with a spherical main part () and a plurality of ribs () formed on the main part (), the interlayer () being accommodated in depressions () surrounded by the ribs () and having a thickness substantially the same as the height of the ribs (), each of the ribs () extending in such a manner that the width thereof becomes greater from the cover towards the core, each of the depressions () being formed into a cone-like shape by side faces of the ribs (), and the hardness of the interlayer () being less than that of the core (). This structure achieves satisfactory soft feeling and high bounce resilience.

The present invention relates to a high-strength golf ball comprising a core having a main core and optionally a sub-core comprising one or more layers, and a cover having one or more layers; and to a high-strength golf ball comprising a core having a main core and optionally a sub-core comprising one or more layers, an interlayer having one or more layers, and a cover having one or more layers; wherein at least one of the portions contains at least one member selected from the group consisting of carbon nanotubes and fullerenes.

High-strength golf ball

A golf ball comprising a core (), intermediate layer (), and cover (), wherein the intermediate layer () is provided with a plurality of apertures through which the core () is exposed, wherein the outer surface of the intermediate layer () and the surface of the core () exposed through the apertures are on substantially the same spherical surface, and wherein the hardness of the intermediate layer () is greater than that of the core (). The golf ball achieves both a high ball resilience and a soft impact feel.

Golf ball and mold for manufacturing core thereof

The present invention provides a multi-piece golf ball comprising a core, a first intermediate layer, a second intermediate layer, and a cover, wherein the first intermediate layercomprises a plurality of ribsformed on the core; the second intermediate layeris placed in concave portions surrounded by the ribs; and the coverforms an outermost layer; with each of the ribs extending so that its width increases from the cover side to the core side; the concave portions being shaped into a funnel-like form by the side surfaces of the ribs; the hardness of the core, the first intermediate layerand the second intermediate layerbeing different from each other; and the hardness of the first intermediate layerbeing greater than that of the second intermediate layer

Multi-piece golf ball, manufacturing method thereof and mold for manufacturing the same

This invention relates to a multi-layered, multi-piece golf ball that comprises a core, an intermediate layer, and a cover, wherein the core comprises a spherical body and ribs that are arranged on the surface of the spherical body and that have almost the same height as the thickness of the intermediate layer, wherein the intermediate layer fills a plurality of concave portions formed on the surface of the spherical body while being surrounded by the ribs. This arrangement enables the golf ball to have both high ball bounce resilience and a soft feel when hit.

A golf ball comprising a spherical core () and a cover () covering the spherical core (), wherein the core () is provided with grooves () along three great circles drawn on the surface of the core () so as to intersect each other at right angles, and projections () engaging in the grooves () are provided on the inner surface of the cover (). A golf ball with such a structure has both high resilience and soft feel when hit.

Growing community of inventors

Osaka, Japan

Norikazu Ninomiya