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    • 49. 发明授权
    • Game ball
    • 游戏球
    • US4856781A
    • 1989-08-15
    • US945617
    • 1986-12-23
    • Hideomi ShishidoShigeo DoiHideki SumidaMasayuki Tanaka
    • Hideomi ShishidoShigeo DoiHideki SumidaMasayuki Tanaka
    • A63B41/08A63B41/00
    • A63B41/08A63B2243/0025A63B2243/0095
    • A ball for ball game comprises a rubber hollow spherical bladder, a valve holder fixed to the tube for charging air into the tube, a valve member attached to the valve holder; a fabric layer covering the bladder surface and a leather layer. The fabric layer is composed of a plurality of equilateral quadrilateral pieces sewn together to form a sphere. The equilateral quadrilateral pieces each include two sheets of approximately trapezodial fabric pieces that are sewed together symmetrically at a central seam line. The equilateral quadrilaterla pieces are sewed together such that central seam lines of adjacent equilateral quadrilateral pieces fall at right angles to ech other. The fabric layer gives sphericity, dimensional stability and durability to the ball. The leather layer is adhered to the fabric layer directly or through a rubber based thin intermediate layer. On a circumferential line in the fabric layer which includes one seam line, at least one other seam line exists at a prescribed interval to equally divide the un-sewn portions. All segments on the spherical surface of the fabric layer, which are divided by a plurality of circumferential lines including all of the seam lines, have the same shape.
    • 用于球赛的球包括橡胶空心球形球囊,固定到管上以将空气充入管中的阀座,连接到阀座的阀构件; 覆盖膀胱表面的织物层和皮革层。 织物层由缝合在一起形成球体的多个等边四边形片组成。 等边四边形件各自包括两张约中间缝线对称地缝合的大致梯形织物片。 等边四边形片缝合在一起,使得相邻等边四边形片的中心接缝线与其他方向成直角。 织物层赋予球的球形度,尺寸稳定性和耐久性。 皮革层直接或通过基于橡胶的中间层粘附到织物层。 在包括一条接缝线的织物层的周向线上,以规定的间隔存在至少一条另外的接缝线,以均匀分割未缝制的部分。 由包括所有接缝线的多个圆周线划分的织物层的球形表面上的所有部分具有相同的形状。