| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary pump capable of reducing the load on a rotor and motor generated by a high viscosity of the coil in the case of low temperature, i.e., the rotary pump is to be started, and shortening the time required to raise the pump operation, without separately providing any heating means for heating the oil put fully in the pump casing. SOLUTION: The rotary pump is structured so that the rotor having a movable vane is installed rotatably inside a casing furnished with a suction hole and exhaust hole and one end of the movable vane abuts to the inner wall of the casing and rotates as following the rotation of the rotor, and thereby the fluid sucked into the casing from the suction hole is exhausted from the exhaust hole, wherein two pump working chambers are formed in such a way as put in communication to each other at least when the pump is to be started, one bounded by the movable vane, rotor and casing inner wall and the other bounded by the movable vane, rotor and casing inner wall.
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