To lead a hermetically sealed case to an atmosphere of low pressure, and meanwhile surely place a compression mechanism part under a positive lubricating condition.
An electrically driven mechanism part 17 composed of a stator 11, and of a rotor 15, and a compression mechanism part 9 which is provided on a roller 25 capable of applying turning movement to a cylinder 23 by means of the electrically driven mechanism part 7, and allows spiral shaped blades 39 different in spiral pitch to be formed into an operation chamber, are disposed on the upper and lower parts of a hermetically sealed case 1 respectively so as to allow a feeding head for lubrication to be lowered, and meanwhile, the inside of the hermetically sealed case 1 is led to an atmosphere of low pressure by leading suction gas to the hermetically sealed case 1 by way of a suction pipe 5.
SAKATA KANJI
MORISHIMA AKIRA
OZU MASAO
