Abstract: The sprayer comprises a tank carrying the liquid to be sprayed and a motor-compressor assembly intended to supply air under pressure to the tank for the liquid, which comprises a self-contained assembly that can be coupled to the tank for the liquid and an elongate body which is introduced into the tank for the liquid and which carries an assembly of dry or rechargeable batteries, said self-contained assembly also having an upper body carrying the handle for holding the sprayer, the electric motor with its reduction gear train and the compressor, which communicates directly via an internal pipe with the inside of the tank carrying the liquid. It is intended for agriculture, gardening and other applications.

Abstract: A process for the airless spray-coating of a surface with a aqueous-containing Newtonian or non-Newtonian architectural coating composition wherein the composition can contain an associative thickener and is subjected to a pressure of from 2 to 5 bar generated such as by a hand-operated or battery operated electrical compressor and then sprayed from a slot-shaped outlet orifice (52) in a nozzle (50) to produce an outflow (31) of composition having boundaries (35) which diverge at least until it has formed a front of at least 30 mm in width. The composition preferably has a Brookfield viscosity of at least 0.5 pa.sec and a solids content of 7 wt %. Also apparatus for performing the process comprising a container containing the coating compositions together with a nozzle having an outlet orifice, a compressor and a pressure release valve actuatable in the pressure range 2 to 5 bar and preferably an auxiliary orifice upstream of the outlet orifice.