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    • 4. 发明授权
    • Metal springboard
    • 金属弹簧
    • US3862754A
    • 1975-01-28
    • US18879871
    • 1971-10-13
    • PATTERSON JAMES A
    • PATTERSON JAMES A
    • A63B5/10
    • A63B5/10A63B2208/12B21C23/142
    • A metal springboard particularly adapted for use in diving into swimming pools. The springboard is fabricated of aluminum or a similar metal, and is designed so that it can be continuously extruded. The cross-sectional shape of the preferred springboard is composed of a plurality of hollow sections, preferably inverted triangles with a strengthening member attached to the apex of each triangle. The use of this particular shape provides a board which is light in weight, resistant to torsional forces over the entire length of the board, and which has an extended service life due to the elimination of stress concentration and corrosion generating areas. The use of constant-area hollow tubes in conjunction with strengthening members permits the deflection curve of this board to be finely tailored for any chosen application.
    • 特别适用于潜水游泳池的金属跳板。 跳板由铝或类似的金属制成,并被设计成可以连续地挤出。 优选的跳板的横截面形状由多个中空部分组成,优选地具有连接到每个三角形的顶点的加强构件的倒三角形。 使用这种特定的形状提供了一种重量轻,耐板材整个长度上的扭转力的板,并且由于消除应力集中和腐蚀产生区域而延长了使用寿命。 使用恒定面积的中空管与加强构件结合使得该板的偏转曲线可以精确地定制成任何选定的应用。
    • 8. 发明授权
    • Tennis racket for developing tennis swing
    • TENNIS RACKET FOR TUNNIS SWING
    • US3679205A
    • 1972-07-25
    • US3679205D
    • 1970-07-08
    • EUGENE D FINKLEPATTERSON JAMES A
    • FINKLE EUGENE DPATTERSON JAMES A
    • A63B49/02A63B69/38
    • A63B69/38A63B49/035A63B60/34A63B2060/0081
    • A tennis racket is provided with a hinge intermediate the handle and racket head for providing hinged movement of the racket in the plane of the racket head. The hinge is preferably provided with a bias which tends to maintain the racket handle and head in a normal linear relation. When the racket is used to swing and hit the tennis ball so that the centrifugal momentum of the racket head propels the ball, the bias of the spring is not overcome and the racket handle and the head through the hinge are maintained in a normal linear relation. However, when the racket is used to push the tennis ball so that the racket head and handle is used as a lever to propel the ball, the bias of the spring is overcome and the racket handle and head fold at the hinge out of normal relation.
    • 一种网球拍在手柄和球拍头之间设置有铰链,用于提供球拍在球拍头的平面内的铰接运动。 铰链优选地设置有倾向于将球拍柄和头保持在正常线性关系的偏压。 当球拍用于摆动并撞击网球时,球拍头的离心动量推动球,弹簧的偏压不能克服,并且球拍手柄和通过铰链的头部保持在正常的线性关系 。 然而,当球拍用于推动网球使得球拍头和手柄用作杠杆来推动球时,弹簧的偏压被克服,并且球拍手柄和头部在铰链处折回正常关系 。