Abstract: The motor 3 of the vacuum cleaner is surrounded by the elastomeric shroud 4, which is air-tightly joined to the blower 2. The blower 2 moves the drawn in air into the space defined by the shroud, which the air can only leave through the air outlet ports 13 formed in the wall of the shroud. Behind the air outlet ports 13 there is a filter 10, which cleans the air coming from the shroud. The air passes into the space between the shroud and the vacuum cleaner housing, where it is distributed and comes to rest. It passes through numerous air outlet ports 15 in the vacuum cleaner housing at a low speed.
Abstract: A housing for a hand vacuum cleaner having a front dust chamber and a rear motor chamber separated from each other by a baffle, a dust chamber cover linked at the baffle, and a tightly connected motor chamber cover. In the area adjacent to the motor chamber cover there is designed a handle hollow in the dust chamber cover. This handle hollow is partially covered by a handhold which may be arranged at the motor chamber cover as an integral part thereof. In another embodiment of the housing, the handhold is incorporated in the dust chamber cover. At the motor chamber cover there may be arranged a cross-piece projecting toward the dust chamber cover, covering the rear area of the handle hollow and supporting a cross-piece of the dust chamber cover, thus providing a particularly robust handhold.
Abstract: A vacuum cleaner with constant air flow for household and industrial purposes. The vacuum cleaner includes a suction fan driven by an electric motor. An air flow measuring device is arranged in the working air flow of the suction fan, and has an electrical output signal proportional to the air flow. This electrical output signal is conveyed to a regulating and control circuit which adjusts the working air flow to a predetermined value as a function of the output signal.
Abstract: A vacuum cleaner, for household and industrial purposes, including a suction fan, driven by an electric motor, for generating a working air flow, and an electrical converter, in the form of a generator driven by the working air flow, for detecting the strength of the working air flow, the output of the generator being connected with a regulating and control circuit.