Abstract: Cleaning device employing air under pressure is coupled to an external air source and cleans workpieces being carried. The cleaning device includes a mounting base, an air conduit, and a controller. The air conduit and the controller are mounted on the mounting base. The mounting base defines an air inlet communicating with the air conduit, and a free end of the air conduit is facing the workpiece. The controller is capable of sealing the air inlet and turning on and turning off the air conduit. The free end of the air conduit is designed and made of such material that the conduit swings across the moving workpieces to enable the air flow to blow metal chips and all other contaminants from the surfaces of the workpieces.

Abstract: An apparatus for spraying an oil mist on a pull-push basis includes a vacuum generator, a gas transport assembly, an oil transport assembly, and a nozzle. The vacuum generator defines a vacuum chamber. The gas transport assembly can include a gas transport pipe. The gas transport pipe couples an outer high pressure gas source with the vacuum chamber. The oil transport assembly includes an oil transport pipe. The oil transport pipe couples an outer oil tank with the vacuum chamber. The nozzle is coupled to the vacuum chamber and is separated from the gas transport pipe. Oil in the oil transport pipe is sucked into the vacuum chamber when at low pressure and, when a high pressure gas burst is provided to the vacuum generator, an oil mist is sprayed out from the nozzle.