Line-contact-type spherical bearing for connecting piston to connecting rod
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United States of America Patent
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Mar 6, 1990
Issued Date -
N/A
app pub date -
Oct 26, 1988
filing date -
Jun 26, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A hydraulically-operated piston machine includes at least one cylinder and a piston axially movably guided in the cylinder. The piston is connected to a crankshaft or the like by means of a connecting rod. The connecting rod and the piston each have spherically-shaped bearing surfaces serving for connecting the connecting rod and the piston with each other in an articulated manner. The connecting rod defines at its end connected to the piston a radially outwardly facing spherical surface portion which is arranged concentrically with the spherical bearing surface of the connecting rod. The spherical surface portion rests against the surface of a recess defined in the piston, so that a hollow space is defined between the surface of the recess and the spherical surface portion. The piston defines a bore for effecting communication of fluids between the interior of the cylinder and the hollow space.
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