摘要:
A high volume aerodynamic golf club head having a post apex attachment promoting region with a club head volume of at least 400 cc and a front-to-back dimension of at least 4.4 inches producing a face-on normalized aerodynamic drag force of less than 1.5 lbf when exposed to a 100 mph wind parallel to the ground plane and oriented at the front of the club head. The post apex attachment promoting region is on the surface of the crown section at an elevation above a maximum face height and begins at the crown apex and extends toward the back of the club head. The post apex attachment promoting region is a relatively flat portion of the crown section that is behind the crown apex, yet above the maximum top edge plane, and aides in keeping airflow attached to the club head once it flows past the crown apex.
摘要:
A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, and a skirt extending between the crown and the sole and between the toe and the heel. The club head includes a drag-reducing structure that may include one or both of a continuous groove extending from a front portion to a rear edge of the toe, and along an entire length of the skirt, and a substantially V-shaped recess formed in the sole and having a vertex positioned proximate the ball striking face and the heel and away from the skirt and the toe, and a pair of legs extending to a point proximate the toe and away from the ball striking face, and curving toward the skirt and away from the ball striking face.
摘要:
A shaft (1) for a sport stick comprising an elongate hollow tube (2) with an external surface provided with a plurality of indentations (7, 8, 15, 16), such that the aerodynamics of the shaft is modified by the indentations as compared to a shaft with a smooth surface. The invention further relates to a hockey stick, preferably a floor ball stick (1') comprising such a shaft, a mould (30) for producing such a shaft and a method to produce such a shaft.
摘要:
A racket (10, 40, 50, 60, 70, 80) with improved strength and low air resistance includes a head frame (20, 41, 66, 72, 82), a connecting portion (30) extending from the head frame (20, 41, 66, 72, 82), and a handle fastened to a free end (31) of the connecting portion (30). The head frame (20, 41, 66, 72, 82) is provided with an inner circumference surface (22, 44, 56), an outer circumference surface (25) and two annular surfaces (26, 52, 62, 74, 84) connecting between the inner circumference surface (22, 44, 56) and the outer circumference surface (25). The annular surfaces (26, 52, 62, 74, 84) are provided with a plurality of concavities (27, 54, 64, 76, 86) adjacent to the inner circumference surface (22, 44, 56) such that an edge of the inner circumference surface (22, 44, 56) has a waved shape. By means of the aforesaid arrangement, the racket (10, 40, 50, 60, 70, 80) has improved strength and low air resistance and is easy to manipulate.
摘要:
A golf club (1) composed of a head (2), a shaft (3), a grip and the like, the golf club comprising: a roughened surface portion (4) capable of reducing the value of air resistance by forming a turbulent boundary layer around the head (2) when a golfer swings the golf club (1), the roughened surface portion (4) being formed in a neck portion (5) and a socket portion (6) of the head and at least a portion of the shaft (3) adjacent to the head (2).
摘要:
A shaft (1) for a sport stick comprising an elongate hollow tube (2) with an external surface provided with a plurality of indentations (7, 8, 15, 16), such that the aerodynamics of the shaft is modified by the indentations as compared to a shaft with a smooth surface. The invention further relates to a hockey stick, preferably a floor ball stick (1') comprising such a shaft, a mould (30) for producing such a shaft and a method to produce such a shaft.
摘要:
A handle is adapted to be held by a player and a striking end is adapted to contact and propel an object. A structure for a hockey stick is described by using a single, hollow tube of composite material, wherein tubular "ports" extend through the hollow tube. The ends of the ports are bonded to the walls of the hollow tube. The ports improve the stiffness, strength, aerodynamics and comfort of the hockey stick.
摘要:
An article for reducing the drag caused by a fluid flowing over a surface comprises a backing layer having an outer, exposed patterned surface that reduces drag, and an adhesive bonding layer for bonding the backing layer to the surface of a substrate, the article being free of a reinforcing layer.
摘要:
Raquette de jeu de balle ou assimilé (tennis, squash, badmington,... ). Son cadre (6) est visuellement symétrique par rapport au plan longitudinal médian (1) passant par le manche (3) et contenant le centre de gravité de la raquette, mais, grâce par exemple à l'incorporation d'éléments amortisseurs (9 à 11) d'un côté (6g) du cadre (6), elle se divise en deux demi-parties droite-gauche qui, bien que de forme visuellement identique, ont en réalité des caractéristiques physiques différentes.
摘要:
A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, and a skirt extending between the crown and the sole and between the toe and the heel. The club head includes a drag-reducing structure that may include one or both of a continuous groove extending from a front portion to a rear edge of the toe, and along an entire length of the skirt, and a substantially V-shaped recess formed in the sole and having a vertex positioned proximate the ball striking face and the heel and away from the skirt and the toe, and a pair of legs extending to a point proximate the toe and away from the ball striking face, and curving toward the skirt and away from the ball striking face.