Fluid pump with radial bearing between inner rotor and rotary shaft and lubrication groove in outer peripheral surface of radial bearing
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United States of America Patent
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Feb 13, 2018
Issued Date -
N/A
app pub date -
Apr 12, 2016
filing date -
Apr 13, 2015
priority date (Note) -
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Abstract
A pump housing receives an outer rotor and an inner rotor. A joint member couples between a rotatable shaft and the inner rotor to transmit a rotational torque from the rotatable shaft to the inner rotor. A radial bearing is shaped into a cylindrical tubular form. A cylindrical inner peripheral surface of the radial bearing rotatably and slidably supports the rotatable shaft. A cylindrical outer peripheral surface of the radial bearing rotatably and slidably supports an inner peripheral surface of the inner rotor. A lubrication groove is formed in the cylindrical outer peripheral surface of the radial bearing and accumulates fluid, which is present in an inside of the pump housing.
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