Baths having displacements of fluid jets in a straight line

A bath comprising:

• walls defining a bottom and sides upwardly extending therefrom, each of said walls having an inner surface and an outer surface, and said walls cooperating to define a receptacle for water and at least one person,
• a longitudinal opening in one of said walls, in order to communicate between the inner surface and the outer surface of one of said walls, said opening being defined by longitudinal sides, said longitudinal sides extending from one end to an opposite end,
• at least one pair of fluid injectors,
• each injector producing a fluid jet defining a trajectory in a straight line to impinge at a point, upon a portion of a human body,
• said injectors being mounted on a carriage, and defining at least one row, said row being across said longitudinal opening,
• said carriage being provided with a motorized means to mechanically reciprocate said carriage, for displacement of said carriage and thereby said injectors,
• and thus said trajectory from each fluid jet in a straight line, running across said trajectory, and along said longitudinal opening, from said one end to said opposite end of said longitudinal opening, for allowing impinging fluid from each of said injectors, via said longitudinal opening and towards said bath, in order to obtain a path of impinging points in a substantially straight line on said body portion, and to continuously repeat said displacement in a straight line,
• and a housing to confine said injectors, said carriage and partly said motorized means to mechanically reciprocate said carriage, said housing being behind said longitudinal opening and water-tight sealed to said outer surface of said walls,
• said carriage having opposite ends, said opposite ends of said carriage being substantially parallel to said longitudinal sides of said longitudinal opening,
• said opposite ends of said carriage being slidably mounted into said housing, for reciprocating said fluid injectors along said longitudinal opening,
• whereby each of said injectors delivers one fluid jet which is repeatedly continuously displaced as a straight line along said longitudinal opening to impinge upon said portion of a human body in said bath near said longitudinal opening.