Patent ID: 7108018

Claim:
Multiple layer reinforced flexible hose comprising at least one inner tubular first layer made of extruded plastic material, at least one outer tubular second layer made of extruded plastic material, a tubular reinforcement made of a textile material interposed between said first and said second layer, said first and said second layer extending over substantially the entire length of said tubular reinforcement and being homogeneously joined in correspondence of their mutual contact surface so as to define a wall having an overall predetermined thickness, an end portion of said wall having an increased thickness along a longitudinal portion of predetermined extension to thereby provide watertight sealing action with external connection organs, wherein said increased thickness is substantially constant along the whole extension of each said longitudinal portion and a non-linear, stepped increase with respect to the rest of the hose, said end portion with said increased thickness having a substantially constant outer diameter and a smooth and continuous outer surface without discontinuities over an entire length of said end portion, said stepped increase being of substantially circular shape.