Progettazione e produzione di macchine per saldatura e taglio al plasma

A vacuum cleaner is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from floors, and optionally from other surfaces as well. The air vacuumed up must be cleaned by the dust particles before to be airborne. The filter-bag is the typical method to capture the debris vacuumed up. It involves a paper or fabric bag that allows air to pass through, but attempts to trap all dust and debris in the bag. The bag may be disposable, or designed to be cleaned and re-used
Typically the filter is positioned so that the incoming air passes through it before it reaches the motor.
Vacuum cleaners, which are used in homes as well as in industry, exist in a variety of sizes and models.
Cylinder models consists of a large vertically positioned drum, which can be stationary or on wheels. The motor, protected from dust by a filter, is placed in the upper part of the drum, from which a flexible hose comes out, at the end of it usually a section of rigid hose and a brush are located. Their main advantage is flexibility, as you can attach different brushes for different tasks, and maneuverability, the brush can reach under furniture and makes it very easy to vacuum stairs and vertical surfaces.
Wet or wet/dry vacuum cleaners are a specialized form of the cylinder/drum models that can be used to clean up wet or liquid spills.