A vacuum cleaner including a two-stage filtering system positioned within a cleaner body for filtering the air before it passes through an electric motor fan unit. The two-stage filtering system comprises a first dust collecting receptacle having incorporated therein a filtering screen of a relatively large mesh size and detachably positioned within the cleaner body. The filtering system further includes a second filtering member of fine mesh size located immediately downstream of the first dust collecting receptacle within the cleaner body with its inlet opening communicating with the outlet opening of the first receptacle. Air with entrained dirt and dust particles taken into the cleaner body passes initially through the first receptacle where dust having a relatively large size is filtered from the air stream by the filtering screen and through the second filtering member where fine dust particles are removed from the air flow.
The invention comprehends a canister type cleaner having an intermediate piece which extends over the major horizontal extent of the cleaner and is utilized for bag chamber forming and operating element support.
Disclosed is a mounting structure of a blower for a vacuum cleaner comprising a mounting cover for fixing the blower to a body base so that the blower is structurally separated from a body cover. The mounting cover is put on the upper surface of the blower disposed on supporting ribs, and connected to the body base, and then the body cover is put on the body base. The blower is fixedly interposed between the supporting ribs and the mounting cover and separated from the body cover, thereby preventing oscillation generated by the blower from being transmitting to the body cover and then preventing the oscillation of the body cover and the consequently occurring noise of the body cover.
A vacuum cleaner uses a special self-cleaning filter arrangement including an initial fabric filter having a relatively large mesh size with a broad open mesh ratio of 5 to 15% and a total opening area of 5 to 45 times the cross section of the inlet, which inlet faces away from the filter. The initial filter is preferably backed up by secondary filters and is arranged so that dirt collected on the filter is periodically sloughed off and dropped into a receptacle after building to a critical level.
A vacuum cleaner uses a special self-cleaning filter arrangement including an initial fabric filter having a relatively large mesh size with a broad open mesh ratio of 5 to 11 flat filter threads 0.025 to 0.045 inches in width defining oblong filter openings 0.002 to 0.006 inches in width and having a length not greater than will maintain the structural integrity of the filter openings and a total opening area of 5 to 45 times the cross section of the inlet, which inlet faces away from the filter. The initial filter is preferably backed up by secondary filters which filter particulates passing through the initial fabric filter especially during startup and while the filter cleans itself.
A vacuum cleaner includes a motor, a housing enclosing the motor, and a fan driven by the motor for producing a vacuum. A canister is removably attached to the front end of the housing and has an intake nozzle for the reception of foreign matter, liquid and air drawn into the canister is response to the vacuum developed by the fan. A filter assembly includes a filter for filtering foreign matter from the air entering the canister. The assembly also includes a filter housing for housing the filter. The assembly further includes means for removably and positively securing the filter to the filter housing to allow the filter and the filter housing to form an integral unit.
