Abstract: A vacuum cleaner having an air non-pervious body in the shape of a closed bellows in the suction chamber thereof with one end of the bellows bearing against the dust container, and the other end bearing against a partition separating the suction chamber from a positive pressure chamber housing the motor-fan unit. The bellows communicates with the pressure chamber through a conduit so that the bellows can be brought into communication with the positive pressure side of the fan so that the bellows expands and compresses said dust container and its contents, and thus increases the filling capacity of the dust container. The running costs of operating a vacuum cleaner is thus substantially reduced.

Abstract: A compressible dust container for a vacuum cleaner, which is compressed by means of a device that causes a change in pressure between the outside and inside of the dust container, as well as agitating the container. The dust container is then able to be filled to substantial capacity without a false reading on the dust indicator of the vacuum cleaner.

Abstract: The combination of a vacuum cleaner and a dust filter container. The dust filter container does not have a conventional attachment plate. A support structure is located in the vacuum cleaner housing having a projecting member provided with a hole, the latter is inserted through a slot in the dust container whereby the hole aligns with an opening in the dust container. The hole in the projecting member and the opening form a through passage into the dust container from the inlet suction conduit of the vacuum cleaner. A seal is arranged in the vacuum cleaner housing between a flange on the suction conduit and a portion of the dust filter container surrounding the hole therein.

Abstract: The combination of a vacuum cleaner and dust container wherein the latter is provided with an air pervious portion connected to an attachment plate in the form of cardboard and the like. The attachment plate is provided with an inlet for dust-laden air. The attachment plate has a pressure-sensitive element, the movement of which indicates the degree of clogging of the dust container without the use of seals or filters.

Abstract: A vacuum cleaner in which the fan motor is rendered inoperative when there is no dust bag in the apparatus. The arrangement includes a servomotor having a pressure-responsive member, such as a diaphragm that operates a switch which, when closed upon the presence of a dust bag in the vacuum cleaner, permits electric current to be supplied to the fan motor. When no dust bag is present in the vacuum cleaner, the switch, which is responsive to the position of a diaphragm, will return to its original position whereby the electric current to the fan motor is disconnected.