MOTOR UNIT AND VACUUM CLEANER INCORPORATING THIS UNIT Russian patent published in 2008 - IPC A47L9/00 

FIELD: engines and pumps.

SUBSTANCE: in compliance with the fist version, the vacuum cleaner has a housing, a motor, an inner and outer casings, with the motor arranged in vacuum cleaner housing. In the second version, the vacuum cleaner features the first casing, the second casing and an air dispersion means. The second casing can accommodate a part of the first casing. The first casing can accommodate a part of the motor. The first casing contains a device to suck air in the motor. In the first version, the motor assemble incorporates an inner and outer casings to accommodate there between a diffusion passage the mean section of which gradually increases to ensure air dispersion in the said passage. The inner casing contains the first inner casing and the second inner casing. The inner casing has the first opening to let air to forced into motor. The second inner casing has the second opening for air to be forced to the diffusion passage. In the second version, the motor assembly consists of the first casing, second casing and air dispersion means. The first casing incorporates a means to suck air into the motor.

EFFECT: lower noise in operation.

13 cl, 6 dwg