Abstract: A sports bat such as used to play baseball or softball, comprising a shell which includes a first layer of titanium alloy-fiber reinforced composite laminate, a second layer of titanium alloy-fiber reinforced composite laminate and a core layer between the first layer and the second layer. Further, a method of making a bat comprising a shell which includes a first layer of titanium alloy-fiber reinforced composite laminate, a second layer of titanium alloy-fiber reinforced composite laminate and a core layer between the first layer and the second layer.

Abstract: A vibration damper device (1) intended to be mounted on a sports article such as, in particular, a tennis or squash racket, a gliding board or a golf club, whereinthe device includes at least two elements (3, 4) superposed to form a stack and mounted so as to slide relative to one another, each element (3, 4) in said stack being secured to the article by one end, the ends (13, 14) of the adjacent elements being offset relative to one another so that the deformations of the article (8) due to the vibrations cause the adjacent elements (3, 4) to slideand at least one of the superposed elements (4) is magnetized, one of the other elements (3) in the stack being made of a material which is sensitive to the magnetic field generated by the magnetized element (4).

Abstract: A board game comprises a board and a set of movable pieces for each of two players. The board is marked into a matrix of spaces forming a plurality of concentric perimeters, the innermost perimeter surrounding a single central space. Each perimeter comprises a separate level, the outermost perimeter being the lowermost level, and the central space forming the uppermost level. Each level has selected "jumping" spaces. A player may move a piece may only to an adjacent space on the same level, except when (1) the piece is on a jumping space, or (2) another piece is on an adjacent space on the same level, or (3) another piece is on adjacent space on the next higher level. When a piece is on a jumping space, it may jump to the immediately adjacent space on the next higher level. When another piece is on an adjacent space on the same level, the piece to be moved may jump over that piece to the next space on the same level.

Abstract: A golf club shaft is composed of a fiber layer formed by employing a filament winding process using filaments each impregnated with a thermosetting resin, and a reinforcement layer formed by partially inserting a braid impregnated with a thermosetting resin onto a predetermined position on the fiber layer. A method of producing a golf club shaft of the foregoing type comprises a step of winding filaments each impregnated with a thermosetting resin around a mandrel to form a fiber layer, a step of inserting a braid composed of filaments each impregnated with a thermosetting resin onto a predetermined position on the fiber layer, a step of allowing the thermosetting resin to be thermally cured, and a step of disconnecting the mandrel.

Abstract: A driver head for golf of which main body is a core member, the core member comprising a required number of small pieces of aluminum plate or small masses of foamed aluminum, the small pieces of aluminum plate or small masses of foamed aluminum being put into a mold for compression molding and welded to each other by use of an electric current.