Universal joint
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United States of America Patent
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-
Jan 6, 1998
Grant Date -
N/A
app pub date -
Sep 8, 1995
filing date -
Sep 10, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A universal joint for small articulation angles has parallel, longitudinally extending tracks in the inner joint part and in the outer joint part and axially freely movable torque transmitting balls held in an uncontrolled way in the tracks. The tracks in the two joint parts include a constant cross-section adapted substantially, without a clearance, to the balls. The rolling movement of the balls is limited by axial stops in one of the joint members. The inner joint part includes outer spherical surface parts which are interrupted by the tracks. The spherical surface parts act as sliding faces. The outer joint part includes inner surface parts which are interrupted by the tracks and which act as guiding faces. When the joint is articulated, the surface parts which act as guiding faces, supportingly act on the surface parts acting as sliding faces around at least one fulcrum positioned on the longitudinal axis of the outer joint part.
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