Nozzle for emission of a mixture of water and air for hydromassage

An improved nozzle for emission of a mixture of water and air for hydromassage, capable of being fixed to a wall of a tub, comprising:

• an outer housing capable of being fixed to a hole in the wall of the tub, said outer housing having a concave and substantially spherical inner surface facing the inside of said tub;
• an inner housing having a convex and substantially spherical outer surface fitted within said inner surface of said outer housing so that the orientation of said inner housing with respect to said outer housing can be varied, said inner housing having an inner duct opened towards the interior space of the tub, said inner housing in combination with said outer housing defining a posterior first chamber in communication with an air supply duct, and a second lateral and annular chamber separated from said first chamber, said second chamber in communication with a water supply duct and an anterior mouth of said inner duct;
• a tubular member joined to said inner housing and communicating posteriorly with said first chamber, said tubular member having an anterior mouth arranged inside said inner duct, said anterior mouth of said tubular member having an inside and outside diameter smaller than the inside and outside diameter respectively, of a posterior portion of said tubular member, the diameter of said tubular member decreasing sharply from said posterior portion to said anterior mouth, and said anterior mouth of said tubular member and said posterior portion being connected by an intermediate portion;
• a one-way valve means applied to said anterior mouth of said tubular member capable of closing the passage through said mouth of said tubular member when the pressure in the space anterior to said mouth of said tubular member is greater than the pressure in an interior space of said posterior portion, said one-way valve means comprising a spherical obturator lodged inside a cavity of said anterior mouth of said tubular member, said anterior mouth of said tubular member having a posterior tapered seat for said spherical obturator, said posterior tapered seat defining an air passage hole, and said anterior mouth of said tubular member also having radial anterior elevations to retain said spherical obturator, said spherical obturator having a diameter smaller than the diameter of said cavity of said anterior mouth of said tubular member and being capable, by resting against said seat, of closing said passage hole;
• and
• a tubular obturator slidable with a seal inside said inner duct.