315,603. Arozarena, R., Santos, I., and Acosta, A. Aug. 24, 1928. Endless-track vehicles.-An endlesstrack device for vehicles comprises a supporting structure, an endless chain of tread members, a series of balls resting on the inner faces of the tread members, and means for retaining the balls at predetermined distances apart. In the construction shown the treads 1 are hinged together at a and are formed with a central projection 5 acting as a guide for two sets of balls 7. The balls in each set are spaced apart by a ball cage formed as a chain and comprising two-part links 8, 9 which surround each ball and are connected together by pivots 10 or universal joints. The balls run over endless strips 11 supported by cross-bars 12 secured to side plates 13, 14 which are fixed to a sleeve 15 mounted on a shaft or axle (not shown).
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机译：315,603。 R. Arozarena，I。Santos和Acosta，于1928年8月24日。无轨履带车辆。-一种用于车辆的无轨履带装置，包括支撑结构，无尽的胎面链条，一系列搁在其上的球胎面构件的内表面，以及用于将球保持在预定距离处的装置。在所示的结构中，胎面1在a处铰接在一起，并形成有中央凸起5，该中央凸起5用作两组球7的导向。每组中的球由形成为链条的球笼隔开，球笼包括两个零件的连杆8、9围绕每个球，并通过枢轴10或万向节连接在一起。球越过环形条11，环形条11由横杆12支撑，横杆12固定到侧板13、14上，侧板固定到安装在轴或轴（未示出）上的套筒15上。
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