ROTARY VANE VACUUM PUMP
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United States of America Patent
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Issued Date -
Dec 11, 2014
app pub date -
Jun 7, 2013
filing date -
Jun 7, 2013
priority date (Note) -
Abandoned
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Abstract
A rotary vane vacuum pump includes a pump casing having a gas inlet port and a gas outlet port, a stator provided within the pump casing and defining a cylindrical stator chamber and a cylindrical rotor eccentrically arranged in the stator chamber and equipped with radially movable radial vanes, the vanes cooperating with the inner wall of the stator chamber for pumping a gas from the gas inlet port to the gas outlet port, the pump casing being filled with such an amount of oil that the stator is immersed in an oil bath acting as cooling and lubricating fluid, wherein a motor for driving the pump is further provided, the motor being arranged in a motor casing that is in fluid communication with the pump casing, whereby the motor is immersed in the oil bath.
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