Bridgestone Sports Co., Ltd.

Tadatoshi Yamada

Hiroshi Higuchi

Hisashi Yamagishi

Yoshinori Egashira

Takayuki Niikura

Mitsuhiko Morimoto

A three-piece solid golf ball comprising a center core, an intermediate layer, and a cover. The center core () has a diameter of at least 29 mm, a hardness in the range of 45-80 JIS C and a specific gravity of less than 1.4. The intermediate layer () has a thickness of at least 1 mm, a specific gravity of less than 1.2, and a hardness of at least 85 on JIS C scale. The cover () has a thickness of 1-3 mm and a hardness of 50-85 JIS C. The ball has a good total balance of properties in that feeling and controllability are improved at no sacrifice of flying performance and durability.

Three-piece solid golf ball

An athletic shoe has a sole composed of an inner layer and an outer layer that comes into contact with the ground surface. In the athletic shoe, a plurality of downward projecting projections are formed on the lower surface of the outer layer as parts of the outer layer, and a ring-shaped flange portion is formed as a part of the outer layer to surround the corresponding projection. The ring-shaped flange portion slants upward from its outer edge toward the inner edge. When a downward pressure greater than a predetermined value acts onto a portion where the projection and the corresponding flange portion are formed, the flange deforms in order to move the projection downward. In another athletic shoe, a plurality of projections is formed on the outer surface of a sole, and a depression is formed in the outer surface of the sole in the vicinity of each of the projections. The athletic shoe is excellent in terms of performance in gripping a soft ground surface such as a lawn surface and the easiness of walking on hard surfaces such as a paved path or a floor.

Athletic shoe

A spike for a sole is provided with a pin and a receiving portion for receiving a rear end portion of the pin, an elastic member is provided between the rear end portion of the pin and the receiving portion, a sports shoe having elastic spikes is also provided with the sole, and the rubber spikes being arranged in combination with the elastic spikes each including the pin, the receiving portion and the elastic member.

Elastic spikes and sports shoes with the elastic spikes

A three-piece solid golf ball comprising; a center core, an intermediate layer, and a cover enclosing the core through the intermediate layer,

A three-piece solid golf ball comprising a center core, an intermediate layer, and a cover. The center core (1) has a diameter of at least 29 mm, a hardness in the range of 45-80 JIS C and a specific gravity of less than 1.4. The intermediate layer (2) has a thickness of at least 1 mm, a specific gravity of less than 1.2, and a hardness of at least 85 on JIS C scale. The cover (3) has a thickness of 1-3 mm and a hardness of 50-85 JIS C. The ball has a good total balance of properties in that feeling and controllability are improved at no sacrifice of flying performance and durability.

Growing community of inventors

Mitaka, Japan

Tadatoshi Yamada